WO2013169054A1

WO2013169054A1 - Coordinate synchronization plate for providing and fixing coordinates to workpiece

Info

Publication number: WO2013169054A1
Application number: PCT/KR2013/004134
Authority: WO
Inventors: 이태경; 정제교
Original assignee: Yi Tae-Kyoung; Jung Je-Kyo
Priority date: 2012-05-11
Filing date: 2013-05-10
Publication date: 2013-11-14
Also published as: KR101353335B1; CN104284638A; KR20130126213A

Abstract

The coordinate synchronization plate according to the present invention comprises: a main body having a plate shape; and a fixing element which is formed on an upper surface of the main body, and which prevents the plaster poured on the upper surface of the main body, as well as a processing model coupled to the plaster, from rotating. Image data on the processing model integrally coupled to the main body via the plaster is obtained, and the processing model is fixed at a processing device and processed.

Description

Plate for coordinate synchronization to coordinate and fix the workpiece

The present invention relates to a coordinate synchronization plate used for coordinate synchronization that integrates a plurality of pieces of image data for a work object or the equivalent model acquired or determined in a heterogeneous coordinate system into one coordinate system.

In general, when additional work is to be performed on a workpiece, for example, an object formed without a machined object or an index (the term "machining" herein means a broad concept encompassing not only a change in shape but also a shift in position , Which is used in the same sense throughout this specification unless otherwise specified), the machining results do not meet the planned target values, and a new workpiece is prepared again and machined again. Furthermore, since it is difficult to accurately grasp the desired machining position or shape, if the failure is repeated many times, a lot of material and processing costs as well as time are wasted.

Therefore, it is necessary to determine the proper machining position and machining type through simulation before the actual machining. In order to do this, it is necessary to simulate an appropriate machining plan based on the scanned image data after scanning the workpiece, It is efficient to process the actual workpiece.

Such a simulation technique has been developed with the development of a digital image processing technology, and a device for extracting a three-dimensional image of an object almost in the same manner as an actual device, for example, a CT device, has been developed. Level image-based simulation technology has become possible.

However, since the image extracted from the workpiece, which is the basis of the machining plan determined by the simulation, follows the coordinate system of the image extracting apparatus, the machining of the actual workpiece follows the coordinate system of the machining apparatus. A separate process and / or device is required.

The above-mentioned simulation technique is applied to the latest implant treatment combined with the image diagnosis technology and the image processing technique. The applicant of the present application has filed a patent application No. 2008-0108291, 2009-0112529, 10-2010-0012387 No. 10-2010-0033112, and the like.

In particular, the patent application No. 10-2010-0012387 discloses a method of forming a reference marker which is a reference for coordinate synchronization on a plate itself having a plate-shaped body, in which a gypsum is poured on the plate, (Corresponding to the object to be worked on) of the gypsum model, and a shape complementary to the reference marker is included on the bottom surface of the gypsum model. Based on the three reference points extracted from the complementary shape of the reference marker, Discloses a technique for performing coordinate synchronization.

1 shows a series of processes for making a gypsum model including a complementary shape of a reference marker using a plate of Patent Application No. 10-2010-0012387.

(a) to (b) are to cut a few slices of the bottom surface of the gypsum model (mandible) to increase the bonding force with the gypsum poured on the plate, and steps (c) to (d) This is the process of inserting the female screw plug into the hole on the shaft. Then, plaster is poured into a recessed receptacle on the upper surface of the plate as shown in (e) to (f), and a plaster model with cutting grooves is placed thereon to sufficiently harden the gypsum. (g) shows the process of blowing compressed air through the hollow shaft to separate the plaster model from the plate. Through this series of processes, the plaster of the plaster containing the complementary shape of the reference markers as shown in (h) and (i) Model is obtained.

It has been found that the plate of the above-mentioned Patent Application No. 10-2010-0012387 is a highly efficient method of coordinate synchronization when transferring simulated machining data on a computer to a machining apparatus, but it has also been found that some improvement is required in this process.

This problem is caused by the fact that the existing plate is made of gypsum material. Plate made of gypsum may be damaged by pressure applied during plate production, and the reference marker portion is often broken. It was also not easy to fix and process the fragile gypsum plate to the processing apparatus.

Nevertheless, the inventor of the plaster-made plate is to extract the reference point from the reference marker engraved in the gypsum model or to extract the reference point from the integrally formed marker in the gypsum model itself or to obtain the same degree of blackening in the CT photographing to be.

A method of extracting a reference point from a marker integrally formed in the gypsum model itself is related to the patent application 10-2011-0042392 and 10-2011-0053291 filed by the present applicant. The patent application is to attach a fiducial marker for coordinate synchronization between the gypsum model of the intraoral structure and the actual image data (including the simulated processing data) to the patient's own tooth or fix it to the alveolar bone, The number of visits to the patient, and the reproducibility. Thus, when the reference marker is directly mounted on the patient's wrist and the impression of the gypsum model is performed, the shape of the reference marker is conveniently left in the gypsum model .

However, depending on the patient, it may be difficult to directly attach the reference marker to the patient's premises, so that it is difficult to discard the method of inscribing the complementary shape of the reference marker in the gypsum model. It is necessary to develop an improved plate for coordinate synchronization.

The present invention overcomes the disadvantages of the conventional plate for coordinate synchronization of gypsum materials and provides a method of inscribing the complementary shape of the reference marker in the gypsum model and a method of forming both the shape of the marker in the process of producing the gypsum model And to provide a plate for an improved coordinate synchronization that can be used for coordinate synchronization.

Another object of the present invention is to improve the reference marker embedded in the complementary shape of the gypsum model so as to be extracted as image data suitable for coordinate synchronization.

A coordinate synchronization plate according to the present invention comprises: a plate-shaped body; And an object fixing element mounted on an upper surface of the body for preventing rotation or disengagement of a curable binder poured on an upper surface of the body and a workpiece coupled to the binder, The body is fixed to the machining apparatus so that the image data of the workpiece is integrally combined and has a predetermined geometric relationship with reference points extracted from the object fixing elements included in the image data, And the object is machined.

Here, the coordinate synchronization plate is made of a metal, an alloy thereof, or a synthetic resin having a density of 2.0 to 3.0 g / cm < 3 >, preferably made of aluminum.

Alternatively, the coordinate synchronization plate may be made of a synthetic resin having a density of 2.3 g / cm 3 or less and a mixture of materials having a density of 2.3 g / cm 3 or more.

Meanwhile, the object fixing element may be constituted by one or more protruding elements or recessed elements.

At this time, the protruding element and depressing element may be made of a metal, an alloy thereof, or a synthetic resin having a density of 0.5 to 4.5 g / cm < 3 >.

It is also possible that the density of the object fixing elements is 3.0 to 4.5 g / cm 3 and the density of the body is lower than the density of the object fixing elements by at least 0.5 g / cm 3, or an alloy thereof or a synthetic resin.

It is also possible that the density of the object fixing elements is 0.5 to 2.0 g / cm 3, the density of the body is at least 0.5 g / cm 3 higher than the density of the object fixing elements, or the alloy or synthetic resin.

Here, in an embodiment of the object fixing element, the object fixing element has a cross section of one protruding element or depressed element which is a polygon which is in contact with a circle or a circle, and the diameter of the circle is 30 mm or more.

At least one auxiliary fixing element independent from the object fixing element may protrude or sink into the body.

Alternatively, in another embodiment of the object fixing element, the cross section of the object fixing element is at least three or more protruding elements or depressed elements that are polygons that are in contact with a circle or a circle, and the diameter of the circle is 2 mm or more.

The projecting element or depression element is disposed so as to satisfy the condition that the area of the triangle connecting the three reference points selected from the vertices of the circumference or polygon, which is one end face of the object fixing element, is at least 900 mm2.

On the other hand, the body has a device fixing element coupled to the processing device, and the device fixing element is formed at a predetermined geometric position with respect to a reference point extracted from the object fixing element.

Further, the embodiment of the present invention may further include a step formed so that a cross-sectional shape of the inner space surrounding the object fixing element along the perimeter of the body has a horseshoe shape.

In addition, a groove for a marker or a projection for a marker for use as a marker may be formed on an upper surface or a lower surface of the body, wherein the groove for a marker or the projection for a marker has a predetermined geometric .

In particular, the marker groove or the marker projection formed on the upper surface of the body may be formed on the protruding surface of the step, and the marker groove may have a density of at least 0.5 g / cm < 3 & The material that is immersed can be filled.

The coordinate synchronizing plate of the present invention having the above configuration can overcome the disadvantage of the coordinate synchronization plate of the existing gypsum material and can be used in a method of inscribing the complementary shape of the reference marker in the gypsum model and a method of inserting the shape of the marker Can be compatible with each other.

Further, according to the present invention, it is possible to perform coordinate synchronization with high accuracy by having a shape marker (size) and a geometrical arrangement such that a reference marker engraved in complementary shape in a gypsum model can be extracted as image data suitable for coordinate synchronization.

Figure 1 shows a series of processes using a coordinate synchronization plate according to the prior art.

Figures 2 to 12 illustrate various embodiments of a coordinate synchronization plate in accordance with the present invention.

[Description of Symbols]

10: coordinate synchronization plate 100: body

110: step 200: object fixing element

210: protruding element 220: depressed element

230: auxiliary securing element 240: device securing element

300: groove for markers 310: projection for markers

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In describing the embodiments of the present invention, a description of well-known structures that can be understood by those skilled in the art will be omitted so as not to obscure the gist of the present invention. In addition, when referring to the drawings, it should be considered that the thicknesses of the lines and the sizes of the constituent elements shown in the drawings may be exaggerated for clarity and convenience of explanation.

The terms used in describing the embodiments of the present invention and defining the relative positions of the front and rear, left and right, and up and down are used with reference to the accompanying drawings. It should be borne in mind, however, that the definition of such a relative position may be changed to an equivalent arrangement without alteration to an essential part of the invention.

The above-mentioned prior patent application 10-2010-0012387 of the present applicant can be included as part of the detailed description of the present application in duplicate in describing the present invention.

2 to 10 show various embodiments of the coordinate synchronization plate 10 according to the present invention.

The structure of the illustrated embodiments is basically a plate-shaped body 100, a curable binder poured on the upper surface of the body 100 as an element formed on the upper surface of the body 100, Or an object fixation element (200) that prevents escape.

The binder initially has fluidity at room temperature, but has hardenability that solidifies with the lapse of time in the state of being exposed to air. Typically, the gypsum can be exemplified as in the example shown in Fig. 1, Can also be used.

The workpiece is integrally coupled to the body 100 of the coordinate synchronization plate 10 through such a coupling member, so that the image data of the workpiece can be obtained in this state. This is possible because the plate 10 for coordinate synchronization is made of a material different from that of the binder and / or gypsum material.

The image data acquired through the CT photographing or the like naturally includes the image of the object fixing element 200. The image data obtained through the CT photographing or the like includes the image of the object fixing element 200 and the plate 10 is set to have a predetermined geometric relationship with respect to the reference point extracted from the image of the object fixing element 200. [ The body 100 is fixed to the processing apparatus. In other words, since the upper reference point is constantly determined by the object fixing element 200 (which corresponds to the center of the circle to be described later), the relative position of the object fixing element 200 with respect to the processing apparatus is kept constant If reproduced, the position of the reference point has already been determined in the coordinate system of the machining apparatus, and based on the coordinate value of the reference point, the entire image data of the workpiece can be transferred to the coordinate system of the machining apparatus.

When the reference point is determined from the image of the object fixing element 200, it is most preferable to select and determine three coordinates from the image of the object fixing element 200. This is because the minimum number of coordinates for extracting a circle from the spatial coordinates is three, and if no three or more coordinates are selected, _n C ₃ when three or more coordinates have non- (N is a natural number of n> 4, where n is the number of selected coordinates), which is not different from the matching of the surface shape based on the crimp and is inefficient. In the present invention, the coordinate selected by the object fixing element 200 is a circular point when the sectional shape of the object fixing element 200 is a circle, and is a vertex when the object fixing element 200 is a polygon.

For reference, the coordinate synchronization between the work object (the plaster model in this embodiment) and the in-vivo image data of the actual patient is made by matching the coordinates of the reference marker on the in-vivo image data with the matching marker attached to the workpiece. [0040] In the coordinate synchronization method, a coordinate system is synchronized with the coordinate synchronization plate 10 to obtain image data, and the image data and the in-vivo image data of the actual patient are read from the matching marker and the reference marker And matching them based on extracted reference points (hereinafter, simply referred to as markers). Alternatively, it is possible to directly obtain the coordinates of the marker of the workpiece coupled to the plate 10 for coordinate synchronization, and then to match the coordinates to the coordinates of the marker on the patient's intraoral image data. Particularly, the latter method is convenient when the coordinates of the marker of the workpiece can be read according to the coordinate system of the processing apparatus when the plate 10 for coordinate synchronization on which the workpiece is placed is fixed to the processing apparatus. And is described in detail in a patent application No. 10-2010-0033112.

Here, the plate 10 for coordinate synchronization of the present invention is made of a metal having a density of 2.0 to 3.0 g / cm 3, an alloy thereof, or a synthetic resin, preferably made of aluminum. This density is a value corresponding to the density of the conventional plate 10 made of gypsum, so that image data can be acquired with the same degree of blackening as the conventional one. In addition, the durability of the material is superior to that of gypsum, so that the plate 10 for coordinate synchronization can be used repeatedly.

When the plate 10 for coordinate synchronization is made of synthetic resin, it may be made of a synthetic resin having a density of 2.3 g / cm 3 or less and a mixture of materials having a density of 2.3 g / cm 3 or more. (PTFE), PET (Polyester, 1.31 g / ㎤) and ABS (Acrylonitrile Butadiene Styrene, 1.05 g / ㎤) were used as the synthetic resin having the density of 2.3 g / Lt; 3 > or more is barium or the like. Particularly, it is advantageous to select a substance having a density of 2.3 g / cm 3 or more because it has excellent contrast and helps to obtain a clear image during CT scan.

The object immobilizing element 200 may comprise one or more protruding elements 210 or depressing elements 220 wherein the protruding elements 210 and depressing elements 220 have a density of 0.5 to 4.5 g / Or an alloy thereof or a synthetic resin. That is, only the density of the object fixing element 200 necessary for the reference point extraction in the coordinate synchronization plate 10 may be specifically controlled.

However, since it is preferable that the object fixing element 200 is read out more vividly and sharply than the body 100 on the CT image data, the object fixing element 200 has a density of 3.0 to 4.5 g / cm 3, It is preferred that the density is less than 0.5 g / cm < 3 >, or metal or alloy thereof, or synthetic resin, respectively. In this case, the object fixing member 200 and the body 100 may be separately manufactured and joined by a method such as indentation.

In contrast to the above embodiment, the density of the object fixing element 200 is 0.5 to 2.0 g / cm 3, the density of the body 100 is at least 0.5 g / cm 3 higher than that of the metal or its alloy, It is also possible to provide a density difference.

In addition to the density for ensuring the appropriate degree of blackening on the CT image data, the characteristics considered in the object fixation element 200 to ensure geometric accuracy are its dimensions and geometric arrangement.

An embodiment of the object fixing element 200 shown in FIGS. 4 to 9 may be applied to a case where the cross section of the object fixing element 200 is a polygonal one protruding element 210 or a depressing element 220 ), And the diameter of the circle is 30 mm or more. The shape of the cross section is a polygon that is in contact with a circle or a circle. This is for the purpose of extracting a consistent reference point. The minimum diameter of the circle is defined as the deviation of the center coordinate Is within an acceptable tolerance range.

At least one auxiliary fixing element 230 independent from the object fixing element 200 may be protruded or depressed in the body 100. The auxiliary fixing element 230 may be formed to prevent rotation of the workpiece It is, of course, provided for the purpose of ensuring that the workpiece is mounted only in one direction when the workpiece is removed and reassembled as required. The auxiliary securing element 230 may be made significantly smaller than the object securing element 200.

Another embodiment of the object fixation element 200 is shown in Figures 2 and 3 wherein the object fixation element 200 of the illustrated embodiment has a polygon (not shown) whose cross- At least three protruding elements 210 or recessing elements 220, the diameter of which is at least 2 mm. The difference from the above embodiment is that the object fixing element 200 is made up of three or more protruding elements 210 or recessing elements 220 to extract one reference point from each object fixing element 200, The minimum diameter of the element 200 is defined as 2 mm or more. Here, the minimum diameter of 2 mm or more is taken into consideration that a single-layer interval (scan interval) of a conventional CT imaging apparatus is about 2 mm, which means that the object fixation element 200 is completely included between scan intervals of the CT imaging apparatus, To prevent the object fixing element 200 from appearing on the screen.

At this time, the projecting element 210 or the depressing element 220 may be formed so as to satisfy the condition that the area of the triangle connecting the three reference points selected from the vertices of the circumference or polygon, which is one end face of the object fixing element 200, . The reason for this is the same reason that the minimum diameter of the circle is set to 30 mm in the above embodiment. Especially, when the minimum area is set to 900 mm 2, about 70% of the area of the closed curve of the average dental arch of an adult As shown in FIG.

10-12 illustrate embodiments in which the step 110 is protruded along the rim of the body 100 of the plate 10. The step 110 is not necessarily required but the viscosity of the binder is low, In the case of flowing out from the outside. In particular, the step 110 of the illustrated embodiments is formed such that the cross-sectional shape of the inner space surrounding the object fixing element 200 has a horseshoe shape. The horseshoe shape of the horseshoe shape corresponds to the shape of the horseshoe- And it is possible to minimize the amount of the binder used.

10 is a coordinate synchronizing plate 10 for CT photographing. An object fixing element 200 is formed on an upper surface of a plate 10, and a recessed groove for use as a marker is formed on the bottom surface thereof . The shape of the marker groove 300 is determined by the depressing element 220 of the object fixing element 200 and the position of the marker groove 300 is determined by the position of the object fixing element 200 on the upper surface of the plate 10 Or at least have a predetermined geometric position with respect to the object fixation element 200 or the processing apparatus. It is also possible to apply protruding marker protrusions 310 instead of the marker grooves 300 and the marker groove 300 or the marker protrusions 310 may be used to restrict the direction and position (Interdigit) element.

On the other hand, the embodiment of Fig. 11 is the coordinate synchronization plate 10 that assumes the case of scanning the surface shape by optical, laser, or contact type. The biggest difference from the plate 10 for coordinate- And a protrusion 310 for a marker protruded on the protruding surface of the step 110 is separately formed. The reason why the marker projection 310 is formed on the plate 10 of FIG. 11 is that, in the case of the CT photographing, the shape data of the depressed inside of the plate 10 can be obtained, but in the case of the scanner which scans only the surface shape This is impossible. However, since there is no marker groove groove on the bottom surface of the plate 10, it may be preferable to form a separate fitting groove so that it can be connected to the processing apparatus in a consistent manner.

Fig. 12 is an embodiment of a coordinate synchronization plate 10 made to be able to combine the embodiments of Figs. 10 and 11 into one to cope with all cases of CT scanning and surface scanning. 12 includes a marker groove 300 on the bottom surface of the plate 10 and a marker protrusion 310 on the protruded surface of the step 110 to perform a CT scan and a surface scan The present invention is not limited to this. As a matter of course, it is also possible to form the groove 300 for the marker on the upper surface of the body 100 and the projection 310 for the marker on the lower surface.

The marker groove 300 may be filled with a material having a density differing from the density of the body 100 by at least 0.5 g / cm 3.

The body 100 of the coordinate synchronization plate 10 shown in FIGS. 2 to 12 may be provided with a device securing element 240 coupled to the processing device, As shown in Fig. The instrument fixture element 240 is formed at a predetermined geometric position relative to a reference point extracted from the object fixture element 200 so that the relative position of the object fixture element 200 relative to the processing device remains constant, do. The body 100 itself may play the role of itself without a separate device fixing element 240. For example, if the machining device has the same coupling groove as the shape of the body 100, The same effect can be obtained by inserting and fixing the synchronization plate 10.

In addition, in the conventional gypsum plate 10, it is almost impossible to fix the plate 10 itself by machining a thread, while a female screw thread is formed on the device fixing element 240 and may be coupled to the processing apparatus by bolts or the like In the present invention, it is also an advantage of the present invention that a metal or an alloy thereof or a synthetic resin material is adopted (of course, the above-mentioned density condition must be satisfied) to form a thread on the plate 10 itself.

While the preferred embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles or spirit of the invention. Accordingly, the scope of the present invention will be determined by the appended claims and their equivalents.

Claims

A plate-shaped body; And

An object formed on an upper surface of the body and including a curable binder poured on an upper surface of the body and an object fixing element for preventing rotation or disengagement of a workpiece coupled to the binder,

Wherein the image data of the object to be processed is combined with the body through the coupling member and the image data of the object to be processed is combined with the reference point extracted from the object fixing element included in the image data, Wherein the body is fixed to the machining apparatus to machine the workpiece.
The method according to claim 1,

Wherein the plate for coordinate synchronization is made of a metal having a density of 2.0 to 3.0 g / cm < 3 > or an alloy thereof, or a synthetic resin.
The method according to claim 1,

Wherein the plate for coordinate synchronization is made of aluminum.
The method according to claim 1,

Wherein the plate for coordinate synchronization is made of a synthetic resin having a density of 2.3 g / cm 3 or less and a mixture of a substance having a density of 2.3 g / cm 3 or more.
The method according to claim 1,

Wherein the density of the object fixing elements is 3.0 to 4.5 g / cm < 3 >, and the density of the body is made of a metal, an alloy thereof, or a synthetic resin having a density lower than the density of the object fixing elements by at least 0.5 g / plate.
The method according to claim 1,

Wherein the density of the object fixing elements is 0.5 to 2.0 g / cm < 3 >, and the density of the body is made of a metal, an alloy thereof, or a synthetic resin having a density of at least 0.5 g / plate.
The method according to claim 1,

Wherein the object fixation element is one or more protruding elements or depression elements.
8. The method of claim 7,

Wherein the protruding element and the depressing element are made of a metal or an alloy thereof or a synthetic resin having a density of 0.5 to 4.5 g / cm < 3 >.
8. The method of claim 7,

Wherein the object fixing element is a protruding element or a depressing element whose cross section is a polygon that is in contact with a circle or a circle, and the diameter of the circle is 30 mm or more.
10. The method of claim 9,

Wherein at least one auxiliary fixing element independent from the object fixing element is protruded or depressed on the body.
8. The method of claim 7,

Wherein the object fixing element is at least three protruding elements or depressed elements whose cross section is a polygon that is in contact with a circle or a circle, and the diameter of the circle is 2 mm or more.
12. The method of claim 11,

Wherein the projecting element or the depressing element is arranged so as to satisfy a condition that an area of a triangle connecting three reference points selected from vertices of a circumferential or polygon, which is one end face of the object fixing element, is at least 900 mm2 or more. Plate.
The method according to claim 1,

Wherein the body comprises a device securing element coupled to the machining device and wherein the device securing element is formed at a predetermined geometric location with respect to a reference point extracted from the object securing element.
The method according to claim 1,

Further comprising a step formed so that a cross-sectional shape of the inner space surrounding the object fixing element along the perimeter of the body has a horseshoe shape.
15. The method of claim 14,

And a groove for a marker or a projection for a marker for use as a marker is formed on the protruding surface of the step.
16. The method according to any one of claims 1 to 15,

A marker groove or a marker projection for use as a marker is formed on the upper surface or the lower surface of the body and the marker groove or the marker projection is formed at a predetermined geometric position with respect to the object fixing element or the processing apparatus Characterized by a plate for coordinate synchronization.
17. The method of claim 16,

Wherein the marker groove is filled with a material having a density that is at least 0.5 g / cm < 3 > or more different from the density of the body.