WO2016154844A1

WO2016154844A1 - Method and apparatus for recording jaw position relationship

Info

Publication number: WO2016154844A1
Application number: PCT/CN2015/075370
Authority: WO
Inventors: 孙玉春; 王勇; 吕培军; 李伟伟
Original assignee: 北京大学口腔医院
Priority date: 2015-03-30
Filing date: 2015-03-30
Publication date: 2016-10-06
Also published as: CN106456305B; CN106456305A

Abstract

A method for recording a jaw position relationship, comprising: scanning exposed buccal labial surfaces, located between double corners of the mouth, of upper and lower jaws under a pre-determined jaw position relationship so as to obtain upper-lower jaw buccal labial surface scanning data (101); scanning an upper jaw model and a lower jaw model separately so as to obtain upper jaw model scanning data and lower jaw model scanning data (102); and aligning, according to common areas in the upper-lower jaw buccal labial surface scanning data, the upper jaw model scanning data and the lower jaw model scanning data, the upper jaw model scanning data and the lower jaw model scanning data with the upper-lower jaw buccal labial surface scanning data so as to obtain three-dimensional jaw position relationship scanning data (103). Also provided is an apparatus for recording a jaw position relationship.

Description

Jaw position relationship recording method and device

Technical field

The invention relates to the field of stomatology, in particular to a method and a device for recording a jaw position relationship.

Background technique

In the process of oral prosthesis, in order to simulate the spatial positional relationship of the upper and lower dentition or the edentulous gingival ridge in the physiological position of the recorded person in vitro, it is often necessary for the doctor to soften the wax or flow in the clinic. Materials such as silicone rubber are placed between the upper and lower jaw dentition or the alveolar ridge, hardened and removed and accurately placed on the plaster model. The operation process is cumbersome, especially for those who need full-mouth occlusion reconstruction, not only low efficiency, but also difficult to control the material hard time, which is easy to cause errors in the recording process and affect the accuracy of the restoration related to the jaw position. Beginners and dentists are difficult to master quickly and with high quality. Even high-grade doctors need to spend a lot of clinical time, affecting the rate of clinical diagnosis.

Summary of the invention

It is an object of the present invention to improve the operational efficiency and accuracy of jaw position recording.

According to an aspect of the invention, a method for recording a jaw position relationship is provided, comprising:

Obtaining scan data of the upper and lower jaw and cheek surface, the scan data of the upper and lower jaw and cheek surface were generated by scanning the exposed upper and lower jaws on the lip and cheek surface between the bilateral mouths while maintaining the predetermined jaw position; obtaining the maxillary model scan data and the jaw model scan Data, wherein the maxillary model scan data is obtained by scanning the obtained maxillary model, and the mandibular model scan data is obtained by scanning the obtained jaw model; according to the upper and lower jaw cheek scan data and the maxillary model scan data and the mandibular model scan data In the common area, the maxillary model scan data and the mandibular model scan data were respectively aligned with the upper and lower jaw and cheek scan data to obtain the three-dimensional scan data of the jaw relationship.

Optionally, obtaining the scan data of the upper and lower jaw and cheeks is: obtaining scan data of the upper and lower jaws and the cheeks, wherein the upper and lower jaws are scanned by scanning the exposed upper and lower jaws while maintaining the predetermined jaw position. The dentition is generated on the cheeks of the cheeks between the two sides of the mouth; The scan data of the jaw model and the scan data of the mandibular model were obtained by obtaining the scan data of the maxillary dentition model and the scan data of the mandibular dentition model. The scan data of the maxillary dentition model was obtained by scanning the obtained maxillary dentition model, and the scan data of the mandibular model was passed. The model of the mandibular dentition prepared by scanning was obtained.

Optionally, obtaining the scan data of the upper and lower jaw and cheek surface is: obtaining scan data of the upper and lower jaw edentulous alveolar ridge and cheek surface, wherein the upper and lower jaw edentulous alveolar ridge and cheek scan data pass through maintaining the predetermined jaw position The upper and lower jaw edentulous alveolar ridges exposed by the scan were generated on the cheek and buccal surfaces between the bilateral sulcus; the maxillary model scan data and the mandibular model scan data were obtained: the maxillary edentulous alveolar ridge model scan data and the mandible were obtained. Scanning data of the edentulous alveolar ridge model, in which the scan data of the maxillary edentulous alveolar ridge model was obtained by scanning the maxillary edentulous jaw alveolar ridge model, and the scan data of the mandibular edentulous alveolar ridge model was scanned. The model of the mandibular edentulous alveolar ridge was obtained.

Optionally, the predetermined jaw position includes a cusp stagger, a mandibular advance margin, and/or left and right lateral margins.

Optionally, the predetermined jaw position is a muscle position.

Optionally, the method for recording the position of the jaw position further comprises: obtaining a vertical distance of the maxillofacial region of the recorded person, and the vertical distance of the maxillofacial region is a distance from the eyebrow center to the base of the jaw when the jaw position of the recorded person is the muscle position; The muscle position maintaining device is used for the vertical distance, the muscle position maintaining device is used to maintain the jaw position of the recorded person as the muscle position, and the muscle position maintaining device is used to maintain the jaw position of the recorded person as the muscle position.

Optionally, obtaining the vertical distance of the maxillofacial region of the recorded person comprises: using a vertical distance measuring ruler of the maxillofacial region to obtain a distance from the eyebrow of the recorded subject in the jaw position to the bottom of the sac; and narrowing the distance from the acquired eyebrow to the bottom of the sputum 2mm to 3mm, as the vertical distance of the maxillofacial part of the recorded person.

Optionally, the muscle position maintaining device is configured according to the vertical distance of the maxillofacial region: a pointer for locking the vertical distance measuring rod of the maxillofacial region according to the vertical distance of the maxillofacial region.

Optionally, the making the muscle position maintaining device according to the vertical distance of the maxillofacial region further comprises: filling the space between the vertical distance measuring piece of the maxillofacial region and the skin surface of the front surface of the ankle surface with the fluid quick-setting material.

Optionally, the muscle position maintenance device is used to maintain the position of the recorded jaw as the muscle position: Align the upper pointer of the maxillofacial vertical distance measuring ruler with the eyebrow of the recorded person; and make the crotch of the recorded person against the lower hand of the vertical distance measuring ruler of the maxillofacial region.

Optionally, according to the common area of the upper and lower jaw and cheek scan data and the maxillary model scan data and the mandibular model scan data, the maxillary model scan data and the mandibular model scan data are respectively aligned with the upper and lower jaw and cheek scan data to obtain the jaw position. The three-dimensional scan data of the relationship is: aligning the maxillary model scan data and the mandibular model scan data with the upper and lower jaw and cheek scan data by iterative near point method ICP, and obtaining the three-dimensional scan data of the jaw position relationship.

Optionally, according to the common area of the upper and lower jaw and cheek scan data and the maxillary model scan data and the mandibular model scan data, the maxillary model scan data and the mandibular model scan data are respectively aligned with the upper and lower jaw and cheek scan data to obtain the jaw position. The relationship three-dimensional scan data is: respectively calibrating the corresponding points of the common area of at least 3 pairs of maxillary model scan data and the upper and lower jaw cheek scan data, and the corresponding points of the common region in the scan data of the mandibular model and the scan data of the upper and lower jaw and cheek surface; According to the corresponding points, the transformation relationship between the maxillary model scan data and the upper and lower jaw cheek scan data coordinate system, and the transformation relationship between the mandibular model scan data and the upper and lower jaw cheek scan data coordinate system are obtained respectively; according to the conversion relationship, the upper jaw is respectively The model scan data and the mandibular model scan data were converted to the coordinate system of the upper and lower jaw and cheek scan data, and the three-dimensional scan data of the jaw position relationship was obtained.

By such a method, it is possible to replace the cumbersome manual operation steps of recording various jaw relationships in the conventional oral clinical diagnosis, and to quickly record the spatial positional relationship of the upper and lower jaws of the recorded jaw when the mandible is in a predetermined jaw position by scanning data and data alignment. At the same time, the error that may be caused by the application of various jaw relationship recording materials can be reduced, and the operation efficiency and precision are greatly improved.

According to another aspect of the present invention, a jaw position recording apparatus is provided, comprising: a lip and cheek data acquisition module for obtaining scan data of the upper and lower jaw and cheek surface, and scanning data of the upper and lower jaw and cheek surface by maintaining a predetermined jaw position In the relationship, the upper and lower jaws exposed by the scan are located on the cheek surface of the bilateral appendages; the model data acquisition module is used to obtain the maxillary model scan data and the mandibular model scan data, wherein the maxillary model scan data is obtained by scanning the obtained maxillary model. Obtained, the mandibular model scan data was obtained by scanning the prepared mandibular model; the data alignment module was used to scan the data based on the upper and lower jaw and cheek scan data and the maxillary model scan data and In the common region of the jaw model scan data, the maxillary model scan data and the mandibular model scan data were respectively aligned with the upper and lower jaw and cheek scan data, and the three-dimensional scan data of the jaw position relationship was obtained.

Optionally, a lip and buccal data acquisition module is configured to acquire scan data of the upper and lower jaws and the cheeks, wherein the upper and lower jaws scan the exposed upper and lower teeth by maintaining a predetermined jaw position. The lip-cheek surface is generated between the two sides of the mouth; the model data acquisition module is used to obtain the maxillary model scan data and the mandibular model scan data: obtaining the upper jaw dentition model scan data and the mandibular dentition model scan data, wherein the upper jaw teeth The column model scan data was obtained by scanning the obtained upper jaw dentition model, and the mandibular model scan data was obtained by scanning the obtained jaw dentition model.

Optionally, the lip and buccal data acquisition module is configured to obtain scan data of the upper and lower jaw edentulous alveolar ridges and cheeks, wherein the scan data of the upper and lower jaw edentulous alveolar ridges and cheeks are maintained in a predetermined jaw position. The upper and lower jaw edentulous alveolar ridges exposed by the lower scan are generated on the cheeks and cheeks of the bilateral sulcus; the model data acquisition module is used to obtain the scan data of the maxillary edentulous alveolar ridge model and the mandibular edentulous alveolar ridge. Model scan data, in which the scan data of the maxillary edentulous alveolar ridge model was obtained by scanning the maxillary edentulous jaw alveolar ridge model. The mandibular edentulous alveolar ridge model scan data was obtained by scanning the mandible edentulous jaw. The alveolar ridge model was obtained.

Optionally, the predetermined jaw position is a muscle position.

Optionally, the data alignment module is configured to align the maxillary model scan data and the mandibular model scan data with the upper and lower jaw and cheek scan data by an iterative near point method ICP to obtain a three-dimensional scan data of the jaw relationship.

Optionally, the data alignment module is configured to: respectively calibrate at least three pairs of maxillary model scan data and corresponding points in the common region of the upper and lower jaw and cheek scan data, and the common region of the mandibular model scan data and the upper and lower jaw and cheek scan data. Corresponding points; according to the corresponding points, respectively obtain the conversion relationship between the maxillary model scan data and the upper and lower jaw cheek scan data coordinate system, and the conversion relationship between the mandibular model scan data and the upper and lower jaw cheek scan data coordinate system; , convert the maxillary model scan data and the jaw model scan data to Three-dimensional scan data of the jaw relationship were obtained under the coordinate system of the mandibular and lip buccal scan data.

Such a device can replace the cumbersome manual operation steps of recording various jaw relationships in the conventional oral clinical diagnosis, and quickly record the spatial positional relationship of the upper and lower jaws of the recorded jaw when the mandible is in a predetermined jaw position by scanning data and data alignment. It can reduce the error caused by the application of various jaw position recording materials, and greatly improve the operation efficiency and precision.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flow chart of one embodiment of a method of recording a jaw position relationship of the present invention.

2 is a flow chart of another embodiment of a method of recording a jaw position relationship of the present invention.

3 is a flow chart of still another embodiment of the method of recording a jaw position relationship of the present invention.

4 is a partial flow chart of one embodiment of a method of recording a jaw position relationship of the present invention.

Figure 5 is a flow chart showing still another embodiment of the method of recording a jaw position relationship of the present invention.

Fig. 6 is a structural view showing an embodiment of a jaw position recording apparatus of the present invention.

detailed description

The technical solution of the present invention will be further described in detail below through the accompanying drawings and embodiments.

In step 101, the lips and cheeks between the two corners of the recorded person are exposed, the recorded person is kept in a predetermined jaw position, and the scanning data of the upper and lower jaw and cheeks are scanned. The predetermined jaw position is the relationship of the jaw position that needs to be acquired, which may be the interdigitated position of the cusp, the margin of the mandibular advancement, the left and right lateral margins, and the muscle position. The lip-cheek surface between the two corners of the recorded person can be exposed by means of an oral photography pull hook, pulling open the upper and lower lips of the recorded person, and opening the soft tissue and the corner of the upper and lower lips of the recorded person. In one embodiment, it is desirable to absorb oral saliva and clean the surface of the dry gums or alveolar mucosa to ensure accurate scanning. Scanned data can be stored as STL Format file.

In step 102, the maxillary model and the mandibular model are scanned separately, and the maxillary model scan data and the mandibular model scan data are obtained. The maxillary model and the mandibular model can be obtained by making an impression and filling a plaster model. The scanned data can be stored as an STL format file.

In step 103, according to the common area of the upper and lower jaw cheek scan data and the maxillary model scan data, the maxillary model scan data is aligned with the upper and lower jaw and cheek scan data; according to the upper and lower jaw cheek scan data and the jaw model scan data. In the common area, the mandibular model scan data was aligned with the upper and lower jaw and cheek scan data, and the three-dimensional scan data of the jaw position under the predetermined jaw position was obtained.

A flowchart of one embodiment of the jaw position recording method of the present invention is shown in FIG. 2 when the recorded person does not need to perform the occlusion reconstruction.

In step 201, the upper and lower jaw teeth and cheeks between the two corners of the recorder are exposed, the recorded position is maintained in a predetermined jaw position, and the scan data of the upper and lower jaws are obtained by scanning. The predetermined jaw position is the relationship of the jaw position that needs to be acquired, which may be the interdigitated position of the cusp, the margin of the mandibular advancement, and the left and right lateral margins. The upper and lower jaws can be exposed by the oral photography to pull the upper and lower lips of the recorded person, and the soft tissue and the corner of the upper and lower lips of the recorded person are opened to expose the upper and lower jaws of the recorded mouth. In one embodiment, the oral saliva needs to be aspirated to clean the dry teeth and the gingival mucosal surface to ensure accurate scanning. The scanned data can be stored as an STL format file.

In step 202, the upper jaw dentition model and the lower jaw dentition model are respectively scanned, and the upper jaw dentition model scan data and the mandibular dentition model scan data are obtained. The maxillary dentition model and the mandibular dentition model can be obtained by preparing the impression mold and filling the plaster model. The scanned data can be stored as an STL format file.

In step 203, according to the common area of the upper and lower dentition scan data and the upper jaw dentition model scan data, the upper jaw dentition model scan data is aligned with the upper and lower dentition lip and cheek scan data; The scan data of the buccal surface and the scan data of the mandibular dentition model were used to align the scan data of the mandibular model with the scan data of the upper and lower jaws, and obtain the three-dimensional scan data of the jaw relationship under the predetermined jaw position.

In this way, it is possible to quickly record the spatial positional relationship of the recorded jaw of the recorded mandible in a certain jaw position without the need for occlusion reconstruction by scanning data and data alignment, and at the same time, can reduce the recording material due to the application of various jaw relationships. The error greatly improves the operation efficiency and accuracy.

For a recorded person requiring occlusion reconstruction, a flowchart of one embodiment of the jaw position recording method of the present invention is shown in FIG.

In step 301, the upper and lower jaws of the upper and lower jaws of the recorded subject are exposed to the cheeks and cheeks of the upper and lower jaws. Keeping the recorded person in a predetermined jaw position, scanning and obtaining the scan data of the cheek and cheek of the upper and lower jaw edentulous jaws, because the recorded person is in a toothless state, the top surface of the ridge is also exposed, and the top surface scan can be simultaneously acquired. data. The scan data is intended to be a muscle position. The oral imaging hook can be used to open the upper and lower lips of the recorded person, and the soft tissue and the corner of the upper and lower lips of the recorded person can be opened to expose the upper and lower jaws of the upper and lower jaws of the recorded person. . In one embodiment, it is necessary to absorb the oral saliva and clean the surface of the dry gums and alveolar ridges to ensure accurate scanning. The scanned data can be stored as an STL format file.

In step 302, the maxillary edentulous alveolar ridge model and the mandibular edentulous alveolar ridge model are respectively scanned, and the scan data of the maxillary edentulous jaw alveolar ridge model and the scan data of the mandibular edentulous jaw alveolar ridge model are obtained. The maxillary edentulous alveolar ridge model and the mandibular edentulous jaw alveolar ridge model can be obtained by preparing the impression mold and filling the plaster model.

In step 303, the scan data of the maxillary edentulous alveolar ridge model is aligned with the upper and lower jawless teeth according to the common area of the upper and lower jaw edentulous gingival cheek scan data and the maxillary edentulous alveolar ridge model scan data. Scanning data of the cheeks and cheeks of the jaws; aligning the scan data of the mandibular model with the upper and lower jaw edentulous jaws according to the common area of the scan data of the upper and lower jaw edentulous alveolar cheek and cheeks and the mandibular edentulous alveolar ridge model Alveolar cheek cheek scan data, Three-dimensional scan data of the jaw relationship under the predetermined jaw position was obtained.

By such a method, it is possible to quickly record the spatial positional relationship of the recorded mandible in the predetermined jaw position by the alignment of the scan data and the data alignment, and at the same time, reduce the error that may be caused by the application of various jaw relationship recording materials. , greatly improve operational efficiency and accuracy.

Since the occlusion reconstruction is recorded and the teeth cannot be used to assist in maintaining the position of the lower jaw, the recorded position can be maintained by the recorder by a certain auxiliary method, as shown in FIG.

In step 401, the vertical distance of the maxillofacial region of the recorded person is obtained. The vertical distance of the maxillofacial region may be the distance from the eyebrow of the recorder to the bottom of the skull. Let the recorded person sit, the neck is approximately perpendicular to the horizontal plane, and a black marker can be drawn on the eyebrow point with a black pen. Place the vertical distance of the maxillofacial distance measurement rod against the black marker point, and the lower measurement rod close to the bottom skin to obtain the vertical distance of the maxillofacial region. In one embodiment, the recorded position can be maintained by the recorded person, and the measured distance from the eyebrow to the base of the fund is reduced by 2 mm to 3 mm as the vertical distance of the maxillofacial region. The resting jaw position refers to the position of the lower jaw where the recorded person sits, the lower jaw is slightly drooping, the facial muscles are relaxed, and the upper and lower lips are gently closed. In one embodiment, the averaging may be measured multiple times (eg, 3 times) to reduce the error of the measurement.

In step 402, a muscle position maintaining device is created for assisting the edentulous jaw to keep the mandible in the muscle position. The upper finger of the maxillofacial distance measuring rod can be aligned with the eyebrow of the recorded person, the upper pointer is fixed, and the lower pointer of the vertical distance measuring ruler of the maxillofacial region is adjusted and fixed on the scale of the vertical distance of the maxillofacial portion in step 401. In one embodiment, since the lower portion of the maxillofacial distance measuring rod has a certain distance from the front surface of the subject's ankle, in order to reduce the error, the scale of the maxillofacial vertical distance measuring scale is adjusted to be the vertical distance of the maxillofacial region. The eyebrow of the recorded person is aligned with the upper pointer of the vertical distance measuring ruler of the maxillofacial region. When the bottom is pressed against the lower pointer, the space between the measuring ruler body and the skin of the front surface of the ankle is filled with fluid quick-setting silicone rubber. In order to help fix the horizontal positional relationship between the ankle and the maxillofacial vertical distance measuring ruler.

In step 403, the positional relationship of the recorded person is maintained as a muscle position using the muscle position maintaining device. The maxillofacial position of the adjusted pointer position is aligned with the upper pointer of the measuring ruler to the eyebrow of the recorded person, and if there is a marked point, the eyebrow marking point is aligned; the bottom of the recorded person is pressed against the bottom The pointer is held so that the mandible of the recorded person is in the muscle position.

By such a method, it is possible to assist the edentulous jaw to maintain the muscle position by the recorder, and on the other hand, the accuracy is improved, and on the other hand, the requirement for maintaining the posture of the recorded person is also reduced.

A flow chart of still another embodiment of the jaw position recording method of the present invention is shown in FIG.

In step 501, the distance from the eyebrow of the recorded subject in the jaw position to the base of the jaw is measured. In the measurement process, the recorder needs to sit, the neck is approximately perpendicular to the horizontal plane, and a black marker can be drawn on the eyebrow point with a black pen. Repeatedly confirm that the mandible of the edentulous jaw is in the position of the jaw, and measure the distance between the eyebrow mark point and the bottom of the eye with the vertical distance measuring ruler of the maxillofacial region, and the average value can be measured three times.

In step 502, the distance from the eyebrow center obtained in step 501 to the bottom of the crotch is reduced by 2 to 3 mm as the vertical distance of the maxillofacial region.

In step 503, the pointer of the maxillofacial vertical distance measuring ruler is locked according to the vertical distance of the maxillofacial region obtained in step 502.

In step 504, the upper and lower jaws of the recorded person are exposed on the cheeks and cheeks between the two sides of the mouth. Since the recorded person needs to be occluded and reconstructed, the exposed teeth are the edentulous jaws, the cheeks and the cheeks, and some of the teeth. The top surface of the trough ridge. The oral photography hook can be used to open the upper and lower lips of the edentulous jaw and open the soft tissue and the corner of the upper and lower lips of the recorded person, thereby exposing the upper and lower edentulous alveolar ridges on the cheeks and cheeks between the two sides. Alveolar crest top surface.

In step 505, the recorded jaw is closed to the upper and lower edentulous alveolar ridges, and then the upper pointer of the measuring ruler is coincident with the eyebrow center, and the lower jaw of the recorder is placed against the vertical distance of the maxillofacial measurement.

In step 506, the space between the maxillofacial vertical distance measuring ruler and the anterior surface of the ankle surface is filled with a fluid quick-setting material. It is possible to repeat the movement of the small number of times (5-10 times) by the recorded person, and open the mouth to the lower part of the measuring rod to support the pointer (which can be gently rolled up with the tip of the tongue to the back) to confirm the mandibular position. After the position is stable, the space between the body of the measuring ruler and the skin of the front surface of the ankle is filled with fluid quick-setting silicone rubber.

In step 507, the exposed areas in step 504 are scanned to obtain upper and lower jaw cheek scan data. You can first clean the oral saliva, clean the upper and lower jaw alveolar mucosa Face, then use a 3D scanner to scan directly to get the data. The scanned data can be stored as an STL format file.

In step 508, the maxillary edentulous alveolar ridge model and the mandibular edentulous alveolar ridge model are scanned by a three-dimensional scanner, and the maxillary model scan data and the mandibular model scan data are obtained respectively. The maxillary edentulous alveolar ridge model and the mandibular edentulous jaw alveolar ridge model can be obtained by making an impression and casting a plaster model. The scanned data can be stored as an STL format file.

In step 509, based on the common area of the upper and lower jaw cheek scan data and the maxillary model scan data on the lip and cheek surface, in 3D reverse engineering software (such as Geomagic 2012, reverse engineering and 3D detection by Raindrop (USA) In the software), the maxillary model scan data is aligned with the upper and lower jaw and cheek scan data; similarly, based on the upper and lower jaw cheek scan data and the mandibular model scan data in the common area of the cheek and cheek, in the three-dimensional reverse engineering software, The mandibular model scan data was aligned with the upper and lower jaw cheek scan data. The upper and lower jaw and cheek scan data also includes the edentulous jaws in the top surface of the alveolar ridge ridge scan data, the partial scan data is also common to the scan data of the upper and lower jaw models, so it can also be based on The data is aligned in the common area of the top surface of the ridge, and the three-dimensional scan data of the jaw position relationship is obtained, or the data is aligned by the lip cheek surface and the ridge top surface of the alveolar ridge in the common area, and the three-dimensional scan data of the jaw position relationship is obtained.

By such a method, the scan data and the data alignment can be quickly recorded to obtain the jaw position relationship of the edentulous jaw recorder who needs the occlusion reconstruction, and the recording efficiency is improved, and the operation efficiency and precision are greatly improved.

In one embodiment, the operation of aligning the maxillary model scan data and the mandibular model scan data with the upper and lower jaw and cheek scan data can be performed by ICP (Iterative Closest Point), which minimizes the source data through continuous iteration. The target data corresponds to points to achieve accurate flattening. Through such a method, the software can automatically realize the alignment of the data, reduce the manual operation steps, realize the upper and lower jaw cheek surface scan data including the position relationship of the upper and lower jaws, and the upper jaw model scan data and the lower jaw respectively containing the entire maxillary data. The splicing of the data of the mandibular model of all the data, in order to obtain the complete three-dimensional data of the jaw relationship.

In one embodiment, the maxillary model scan data and the jaw model scan data are respectively The operation of aligning the scan data of the upper and lower jaw and cheek can be obtained by converting the coordinate system of the maxillary model scan data and the scan data of the mandibular model to the coordinate system of the upper and lower jaw cheek scan data, respectively. At least three pairs of common points in the common area of the maxillary model scan data and the upper and lower jaw cheek scan data can be calibrated, and the coordinate conversion relationship between the maxillary model scan data and the upper and lower jaw cheek scan data is obtained according to the coordinates of the three pairs of common points, such as rotation The matrix R and the translation vector T are used to convert the points in the maxillary model scan data to the coordinate system of the upper and lower jaw and cheek scan data according to the coordinate conversion relationship, so that the maxillary model scan data is aligned with the upper and lower jaw and cheek scan data. The mandibular model scan data is aligned with the upper and lower jaw cheek scan data can be achieved in a similar manner. Through such a method, data alignment can be realized by manually calibrating corresponding points to obtain a coordinate transformation matrix, which reduces the burden of computer calculation, reduces the cost of purchasing professional software, and can realize the upper and lower jaw and cheek surface including the position relationship of the upper and lower jaws. The scan data was spliced with the maxillary model scan data of the maxillary model data and the mandibular whole data, respectively, to obtain the complete three-dimensional data of the jaw relationship.

A schematic diagram of one embodiment of the jaw position recording apparatus of the present invention is shown in FIG. Wherein 601 is a lip cheek data acquisition module for acquiring lip and cheek scan data by scanning the lip cheek surface between the bilateral corners exposed by the recorder. The recorded person needs to be in a predetermined jaw position, and the predetermined jaw position may be a cusp staggered position, a mandibular forward margin, a left and right lateral margin, and a muscle position. 602 is a model data acquisition module for acquiring maximal model scan data and jaw model scan data, respectively. It can be obtained by directly scanning the maxillary model and the mandibular model using a three-dimensional scanner. 603 is a data alignment module, configured to align the maxillary model scan data with the upper and lower jaw lips according to the common region of the upper and lower jaw cheek scan data acquired by the lip and cheek data acquisition module 601 and the maxillary model scan data acquired by the model data acquisition module 602. Buccal scan data; according to the common area of the upper and lower jaw cheek scan data and the mandibular model scan data, the mandibular model scan data is aligned with the upper and lower jaw cheek scan data, and the three-dimensional scan data of the jaw relationship under the predetermined jaw position is obtained.

Such a device can replace the cumbersome manual operation steps of recording various jaw relationships in the conventional oral clinical diagnosis, and quickly record the spatial positional relationship of the upper and lower jaws of the recorded jaw when the mandible is in a predetermined jaw position by scanning data and data alignment. Can be reduced due to Recording errors caused by materials with various jaw relationships greatly improves operational efficiency and accuracy.

In one embodiment, the recorded person does not need occlusion reconstruction, and the lip and cheek data acquisition module 601 is configured to scan for the upper and lower jaw visceral scan data between the two corners of the recorded subject without occlusion reconstruction. The recorded person needs to maintain a predetermined jaw position, and the predetermined jaw position may be a cusp staggered position, a mandibular forward margin, and left and right lateral margins. The model data acquisition module 602 is configured to scan the upper jaw dentition model and the lower jaw dentition model respectively, and obtain scan data of the upper jaw dentition model and scan data of the lower jaw dentition model. The data alignment module 603 aligns the upper and lower dentition model scan data acquired by the lip and cheek data acquisition module 601 with the upper jaw dentition model scan data acquired by the model data acquisition module 602, and aligns the upper jaw dentition model scan data with the upper and lower dentition columns. The lip and cheek scan data; the scan data of the upper and lower jaw dentition scan acquired by the lip and cheek data acquisition module 601 and the scan data of the lower jaw dentition model acquired by the model data acquisition module 602, and the scan data of the lower jaw dentition model are aligned with the upper and lower jaws The occlusal cheek surface scan data was used to obtain three-dimensional scan data of the jaw position under the predetermined jaw position.

In one embodiment, the recorded person needs to perform the occlusion reconstruction, and the lip and cheek data acquisition module 601 is configured to scan and acquire the scan data of the upper and lower jaw edentulous jaws and the cheeks and cheeks between the two corners of the recorded person. Since the recorded person is in a toothless state, the top surface of the ridge is also exposed, and the top surface scan data can be acquired at the same time. The recorded person needs to maintain a predetermined jaw position, and the predetermined jaw position is the muscle position. The model data acquisition module 602 is configured to respectively scan the maxillary edentulous alveolar ridge model and the mandibular edentulous alveolar ridge model, and obtain the upper jaw dentition model scan data and the mandibular dentition model scan data. The data alignment module 603 aligns the upper and lower jaw dentition scan data of the upper and lower jaws and the upper jaw dentition model scan data acquired by the model data acquisition module 602 according to the lip and cheek data acquisition module 601. Scanning data of the upper and lower jaw edentulous jaw alveolar cheeks and cheeks; scan of the upper and lower jaw edentulous alveolar ridges and cheeks obtained by the lip and cheek data acquisition module 601 and the model of the mandibular dentition acquired by the model data acquisition module 602 Data, the scan data of the mandibular dentition model was aligned with the scan data of the upper and lower jaw edentulous alveolar ridges and cheeks, and the three-dimensional scan data of the jaw relationship under the predetermined jaw position was obtained.

In one embodiment, the data alignment module 603 is configured to implement the maxillary model scan data and the jaw model by ICP (Iterative Closest Point). The scan data is respectively aligned with the scan data of the upper and lower jaw and cheek surface, and the stitching of the source data and the target data is minimized by continuous iteration to achieve accurate flattening. Such a device enables software to automatically generate data alignment, reduces manual steps, achieves upper and lower jaw cheek scan data including upper and lower jaw positional relationships, and maximal model scan data and lower jaws including all maxillary data respectively. The data of the mandibular model scans the data for splicing, thereby obtaining a complete 3D data of the jaw relationship.

In one embodiment, the data alignment module 603 aligns the maxillary model scan data and the mandibular model scan data with the upper and lower jaw cheek scan data, respectively, and can convert the coordinate system of the maxillary model scan data and the mandibular model scan data to Obtained in the coordinate system of the upper and lower jaw and cheek scan data. At least three pairs of common points in the common area of the maxillary model scan data and the upper and lower jaw cheek scan data can be calibrated, and the coordinate conversion relationship between the maxillary model scan data and the upper and lower jaw cheek scan data is obtained according to the coordinates of the three pairs of common points, such as rotation The matrix R and the translation vector T are used to convert the points in the maxillary model scan data to the coordinate system of the upper and lower jaw and cheek scan data according to the coordinate conversion relationship, so that the maxillary model scan data is aligned with the upper and lower jaw and cheek scan data. The mandibular model scan data is aligned with the upper and lower jaw cheek scan data can be achieved in a similar manner. Such a device can realize data alignment by manually calibrating corresponding points to obtain a coordinate transformation matrix, reduce the burden of computer operation, reduce the cost of purchasing professional software, and realize the scanning of the upper and lower jaw and cheek surface including the position relationship of the upper and lower jaws. The data was spliced with the maxillary model scan data of the maxillary model data and the mandibular whole data, respectively, to obtain the complete three-dimensional data of the jaw relationship.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not the alignment limitations; although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that The specific embodiments are modified or equivalently substituted for some of the technical features; without departing from the spirit of the technical solution of the present invention, it should be included in the scope of the technical solutions claimed in the present invention.

Claims

A method for recording a jaw position relationship, comprising:

Obtaining scan data of the upper and lower jaw and cheeks, the scan data of the upper and lower jaw and cheeks are generated by scanning the exposed upper and lower jaws between the bilateral mouths and the cheeks while maintaining the predetermined jaw position;

Obtaining maxillary model scan data and mandibular model scan data, wherein the maxillary model scan data is obtained by scanning the obtained maxillary model, and the mandibular model scan data is obtained by scanning the obtained jaw model;

Aligning the maxillary model scan data and the mandibular model scan data with the upper and lower jaw lips respectively according to the upper and lower jaw cheek scan data and the common region in the maxillary model scan data and the mandibular model scan data The buccal scan data was used to obtain three-dimensional scan data of the jaw position.
The method of claim 1 wherein

The obtained scan data of the upper and lower jaw and cheek surface is: obtaining scan data of the upper and lower jaws and the cheeks and cheeks, wherein the upper and lower jaws are scanned by scanning the exposed upper and lower jaws while maintaining the predetermined jaw position. The dentition is formed on the cheeks of the cheeks between the two sides of the mouth;

Obtaining the maxillary model scan data and the mandibular model scan data: obtaining the upper jaw dentition model scan data and the mandibular dentition model scan data, wherein the upper jaw dentition model scan data is obtained by scanning the obtained upper jaw dentition model, The mandibular model scan data is obtained by scanning a mandible dentition model.
The method of claim 1 wherein

The obtained scan data of the upper and lower jaw and cheek surface is: obtaining scan data of the upper and lower jaw edentulous alveolar ridge and cheek surface, wherein the upper and lower jaw edentulous alveolar ridge and cheek scan data pass through maintaining the predetermined jaw position The upper and lower jaw edentulous alveolar ridges exposed by scanning under the relationship are generated on the cheek surface of the bilateral sulcus;

The obtained maxillary model scan data and the mandibular model scan data are: obtaining scan data of a maxillary edentulous alveolar ridge model and a scan data of a mandibular edentulous alveolar ridge model, wherein the maxillary edentulous jaw alveolar ridge model scan The data was obtained by scanning the obtained maxillary edentulous jaw alveolar ridge model, and the scan data of the mandibular edentulous alveolar ridge model was obtained by scanning. The model of the jawless edentulous alveolar ridge was obtained.
The method of claim 2 wherein said predetermined jaw position comprises a cusp stagger, a mandibular advance margin and/or a left and right lateral margin.
The method of claim 3 wherein said predetermined jaw position is a muscle position.
The method of claim 5, wherein the method further comprises:

Obtaining a vertical distance of the maxillofacial region of the recorded person, wherein the vertical distance of the maxillofacial region is a distance from the eyebrow center to the bottom of the eye when the jaw position of the recorded person is the muscle position;

Forming a muscle position maintaining device according to the vertical distance of the maxillofacial region, wherein the muscle position maintaining device is configured to maintain the jaw position of the recorded person as a muscle position;

The positional relationship of the recorded person is maintained as a muscle position by the muscle position maintaining device.
The method of claim 6 wherein said obtaining a vertical distance of the subject's maxillofacial region comprises:

Using the maxillofacial vertical distance measuring ruler to obtain the distance from the eyebrow of the recorded person in the jaw position to the base of the jaw;

The obtained distance from the eyebrow to the bottom of the crotch is reduced by 2 mm to 3 mm as the vertical distance of the maxillofacial region of the recorded person.
The method according to claim 6, wherein the making the muscle position maintaining device according to the vertical distance of the maxillofacial region is: locking the pointer of the maxillofacial vertical distance measuring scale according to the vertical distance of the maxillofacial region .
The method according to claim 8, wherein the making the muscle position maintaining device according to the vertical distance of the maxillofacial region further comprises: filling the maxillofacial vertical distance measuring ruler with the fluid quick-setting material The space between the skin on the front surface of the ankle.
The method according to claim 8 or 9, wherein the positional relationship of the subject is maintained by the muscle position maintaining device as a muscle position: an upper finger of the maxillofacial vertical distance measuring ruler Targeting the eyebrow of the recorded subject; causing the subject's ankle to abut the lower pointer of the maxillofacial vertical distance measuring ruler.
The method according to claim 1, 2 or 3, wherein said scan data based on said upper and lower jaw and said maxillary model scan data and said mandibular mold The common region in the scan data is respectively aligned with the maxillary model scan data and the mandibular model scan data, and the three-dimensional scan data of the jaw relationship is obtained as follows:

The maxillary model scan data and the mandibular model scan data are respectively aligned with the upper and lower jaw cheek scan data by an iterative near point method ICP to obtain three-dimensional scan data of the jaw position relationship.
Method according to claim 1, 2 or 3, characterized in that

Aligning the maxillary model scan data and the mandibular model scan data with the upper and lower jaw lips respectively according to the upper and lower jaw cheek scan data and the common region in the maxillary model scan data and the mandibular model scan data Scanning data on the buccal surface to obtain the 3D scan data of the jaw position is:

Calibrating at least three pairs of corresponding points of the maxillary model scan data and the common region in the upper and lower jaw and cheek scan data, and corresponding to the common region of the mandibular model scan data and the upper and lower jaw cheek scan data point;

Obtaining, according to the corresponding points, a conversion relationship between the maxillary model scan data and the upper and lower jaw cheek scan data coordinate system, and the mandibular model scan data and the upper and lower jaw and cheek scan data coordinate system Conversion relationship

According to the conversion relationship, the maxillary model scan data and the mandibular model scan data are respectively converted into coordinate systems of the upper and lower jaw and cheek scan data, and the three-dimensional scan data of the jaw position relationship is obtained.
A jaw position recording device comprising:

a lip cheek data acquisition module for obtaining upper and lower jaw cheek scan data, wherein the upper and lower jaw and cheek scan data are scanned by exposing a predetermined jaw position to expose the upper and lower jaws between the bilateral cheeks generate;

a model data acquisition module, configured to obtain maximal model scan data and a mandibular model scan data, wherein the maxillary model scan data is obtained by scanning a prepared upper jaw model, and the mandibular model scan data is obtained by scanning the obtained jaw model;

a data alignment module, configured to respectively perform the upper and lower jaw cheek scan data and the common region in the maxillary model scan data and the mandibular model scan data The jaw model scan data and the mandibular model scan data are aligned with the upper and lower jaw and cheek scan data to obtain three-dimensional scan data of the jaw position relationship.
The device of claim 13 wherein:

The lip and cheek data acquisition module is configured to acquire scan data of the upper and lower jaws and the cheeks, wherein the upper and lower jaws scan the exposed upper and lower teeth by maintaining the predetermined jaw position. Columns are formed on the cheeks of the cheeks between the sides of the mouth;

The model data acquisition module is configured to obtain scan data of a maxillary dentition model and scan data of a mandibular dentition model, wherein the scan data of the upper jaw dentition model is obtained by scanning an acquired upper jaw dentition model, and the mandibular model scan The data was obtained by scanning a model of the mandibular dentition.
The device of claim 13 wherein:

The lip and cheek data acquisition module is configured to acquire scan data of the upper and lower jaw edentulous alveolar ridges and cheeks, wherein the upper and lower jaw edentulous alveolar ridges and cheeks scan data pass through maintaining a predetermined jaw relationship The upper and lower jaw edentulous alveolar ridges exposed by the lower scan are located on the cheek surface of the bilateral sulcus;

The model data acquisition module is configured to obtain scan data of a maxillary edentulous alveolar ridge model and scan data of a mandibular edentulous alveolar ridge model, wherein the scan data of the maxillary edentulous jaw alveolar ridge model is obtained by scanning The maxillary edentulous alveolar ridge model was obtained, and the scan data of the mandibular edentulous alveolar ridge model was obtained by scanning the mandible edentulous jaw alveolar ridge model.
The device of claim 14 wherein said predetermined jaw position comprises a cusp stagger, a mandibular advance margin and/or a left and right lateral margin.
The device of claim 15 wherein said predetermined jaw position is a muscle position.
The apparatus according to claim 13, 14 or 15, wherein said data alignment module is configured to respectively align said maxillary model scan data and said mandibular model scan data by said iterative near point method ICP The mandibular and labial scan data were obtained, and the three-dimensional scan data of the jaw position was obtained.
A device according to claim 13, 14 or 15, wherein said said The data alignment module is configured to respectively calibrate at least three pairs of the corresponding points of the maxillary model scan data and the common region of the upper and lower jaw and cheek scan data, and the mandibular model scan data and the upper and lower jaw cheek scan data Corresponding points of the common area; obtaining, according to the corresponding points, a conversion relationship between the maxillary model scan data and the upper and lower jaw cheek scan data coordinate system, and the mandibular model scan data and the upper and lower jaw lips a conversion relationship of the buccal scan data coordinate system; according to the conversion relationship, respectively converting the maxillary model scan data and the mandibular model scan data to a coordinate system of the upper and lower jaw and cheek scan data to obtain a jaw position Relational 3D scan data.