WO2014059751A1

WO2014059751A1 - Lingual straight wire dental appliance

Info

Publication number: WO2014059751A1
Application number: PCT/CN2013/070872
Authority: WO
Inventors: 林久祥; 黄伟红; 梁炜; 李祖安
Original assignee: 广州瑞通生物科技有限公司
Priority date: 2012-10-15
Filing date: 2013-01-23
Publication date: 2014-04-24
Also published as: CN102920516A

Abstract

A lingual straight wire dental appliance is provided. Brackets (1) of anterior teeth and brackets (2) of posterior teeth, which are attached on the lingual side of anterior teeth and the lingual side of posterior teeth respectively, are made with surfaces coinciding with anatomical surfaces of lingual side of teeth of a patient so that the brackets are fixed more stably. Meanwhile, an arch wire (3) of anterior teeth is configured with a curved shape and an arch wire (4) of posterior teeth is configured as a straight arch wire to facilitate the teeth to move during growth. Due to a bent portion (6) of arch wire is provided between the arch wire (3) of anterior teeth and the arch wire (4) of posterior teeth, the appliance is installed more tightly so that the better effect on the teeth with need of correction is achieved and discomfort of patient during correction treatment can be reduced at the same time.

Description

Lingual straight wire arch appliance

Technical field

The present invention relates to an orthodontic appliance for orthodontic malformation, and more particularly to a lingual straight wire arch appliance.

Background technique

The shape of the human tongue is significantly different from the lip side, not only between the teeth but also between the individuals, especially the anterior teeth. For example, in the above central incisor, the optimal torque degree (ie, the inclination of the lip to the axis) is 7°. In view of the small difference in the shape of the lip side of the tooth, if the groove torque is 7°, the lip side is 7°. The bracket is attached to the center of the clinical crown of the labial side of the tooth, and the tooth torque corrected by the full-size square wire arch is also extremely small. In other words, the same upper incisor lip bracket is attached to different individuals. The results after the correction are consistent; this is the basis for the lip brackets to be mass-produced according to uniform specifications and applied to different individuals. Taking the shape of the dental arch as an example, the center points of the labial sides of the crown can form a smooth bow shape. Even if the teeth are different in horizontal and vertical directions, they can be compensated by the brackets. This is The anatomical basis of the feasibility of straight wire arch correction for the labial side of the teeth.

The sides of the teeth are different. For example, the individual shape of the upper incisors is larger. The same bracket is attached to the same position of the upper incisors of different individuals. The result of the correction, for example, the torque, is not Do the same. The other anterior teeth are basically similar. Obviously, it is not feasible to mass-produce uniform lingual brackets on different individual teeth like the labial side. A better solution is tailor-made, that is, the brackets are individually made according to the shape characteristics of each individual tongue. A lingual personalized orthosis developed by German orthodontic expert Wiechmann (2001) (individualized brackets and personalized archwires, Incognito Lingual Appliance) better solved this problem. However, when making a personalized lingual appliance, the personalized archwire will form a sloping bend of the lip on the plane of the archwire when extending along the side of the tongue. These bends are not conducive to the smooth movement of the teeth during orthodontic treatment. of. In the process of correction, in order to move the tooth to the ideal position, the ideal way to move is to make the bracket groove which is bonded to the tooth smoothly slide along the smooth straight arch wire without additional bending or smooth straight arch edge without additional bending. The bracket groove smoothly slides, and the bending of the arch wire significantly increases the friction between the arch wire and the groove, which is obviously not as favorable as the straight wire bow, which can produce an unfavorable correction effect. STb straight wire lingual orthosis developed by orthodontic experts Scuzzo and Takemoto (Lingual Straight wire Appliance) trying to solve this problem. It is indeed superior to the lingual personalization aligner developed by Wiechmann in terms of tooth movement. However, it is well known that the lingual arch shape is significantly different from the labial side, especially between the upper canine and the first bicuspid, so that the basic shape of the lingual arch is mushroom-shaped. If a smooth straight wire bow is used on the lingual side like the labial side, it is beneficial for tooth movement, but it is bound to increase the thickness of the lingual bracket of the anterior teeth to compensate for the anatomical difference between the anterior and posterior teeth. In this way, not only the patient's discomfort is significantly increased, but also the bracket is easy to fall off.

Summary of the invention

In order to solve the above problems, the present invention provides a lingual instrument which has a better correction effect and a more stable bracket fixing.

The technical solution adopted by the present invention to solve the technical problem thereof is:

A lingual straight wire arch appliance, comprising a anterior bracket mounted on the lingual side of each anterior lingual, a posterior bracket mounted on the lingual side of each posterior tongue, and a connecting anterior bracket and posterior bracket The anterior archwire and the posterior archwire, the posterior archwire is a straight archwire, the anterior archwire is a curved archwire, and the arch of the anterior archwire and the posterior archwire is provided with archwire bending, each The bracket base surfaces of the anterior and posterior brackets are curved surfaces that match the lingual anatomical surfaces of the anterior or posterior teeth of the anterior or posterior bracket.

Further, as an improvement of the technical solution of the present invention, the anterior arch wire on the upper side of the oral cavity and the posterior archwire on both sides or the anterior archwire on the lower side of the oral cavity and the posterior archwire on both sides are the same archwire.

Further, as an improvement of the technical solution of the present invention, the anterior archwire is a continuous curved shape of each point.

Further, as an improvement of the technical solution of the present invention, an archwire groove is provided on each of the front tooth bracket and the rear tooth bracket.

Further, as an improvement of the technical solution of the present invention, the number of archwire grooves on each of the anterior or posterior brackets is not less than one.

Further, as an improvement of the technical solution of the present invention, the archwire groove on the anterior bracket and the posterior bracket of the bicuspid is a single-wing structure, and the archwire slot on the posterior tooth bracket on the first transverse molar The groove is a double-wing structure, and the archwire groove on the posterior tooth bracket on the second transverse molar is a tongue tube structure.

Further, as an improvement of the technical solution of the present invention, a mesh structure is provided on the bonding surfaces of the anterior and posterior brackets in contact with the teeth.

The invention has the beneficial effects that the lingual straight wire arch appliance corrects the anterior and posterior brackets attached to the lingual and posterior lingual sides of the anterior teeth to conform to the lingual anatomical surface of the patient's teeth. The plane makes the bracket fixing more stable, and the front archwire is set into a curved shape, and the posterior archwire is set as a straight archwire to facilitate the displacement in the tooth growth, in the anterior archwire and the posterior teeth. The arch wire is bent between the arches to make the appliance more secure, which can make the teeth that need to be corrected get better correction, and also reduce the patient's discomfort during the treatment.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings:

1 is a schematic view showing the overall structure of an embodiment of the present invention;

2 is a schematic view showing the structure of an archwire in an embodiment of the present invention;

3 is a schematic view showing a single wing structure of a posterior tooth bracket of a front tooth bracket in an embodiment of the present invention;

4 is a schematic view showing a double wing structure on a rear tooth bracket in an embodiment of the present invention;

Figure 5 is a schematic view showing the structure of the tongue tube on the posterior tooth bracket in the embodiment of the present invention.

detailed description

1 to 5, the present invention is a lingual straight wire arch appliance, comprising a anterior bracket 1 attached to the lingual side of each anterior flank, a posterior bracket 2 attached to the lingual side of each posterior tooth and The front archwire 3 and the posterior archwire 4 are connected to each of the anterior bracket 1 and the posterior bracket 2, the posterior archwire 4 is a straight archwire, and the anterior archwire 3 is a curved archwire, the anterior teeth An archwire bend 6 is provided at the junction of the archwire 3 and the posterior archwire 4, and the bracket base surfaces of each of the front tooth bracket 1 and the rear tooth bracket 2 are both mounted with the front bracket 1 or the rear tray The curved surface of the anterior or posterior lingual anatomical surface of the groove 2 coincides.

The lingual straight wire arch appliance has a anterior bracket 1 and a posterior bracket 2 attached to the lingual side of the anterior and posterior teeth to form a plane matching the lingual anatomical surface of the patient's teeth, so that The fixing of the bracket is more stable, and the anterior archwire 3 is set in a curved shape, and the posterior archwire 4 is set as a straight archwire to facilitate the displacement in the tooth growth, in the anterior archwire 3 and the posterior arch An archwire bend 6 is provided between the wires 4, which makes the installation of the appliance more firm, so that the teeth to be treated can be better treated, and the degree of discomfort of the patient during the treatment can be reduced.

Each anterior bracket 1 and posterior bracket 2 on the lingual straight wire arch appliance are designed according to the shape of the lingual anatomy of the patient, and the brackets of the anterior bracket 1 and the posterior bracket 2 The plane adopts a personalized design, the bracket bottom plate is thin and large in area, and completely conforms to the lingual anatomical surface of the tongue, which not only can significantly improve the comfort of the patient, but also the front tooth bracket 1 and the back tooth bracket 2 are not easy to fall off.

As a preferred embodiment of the present invention, the anterior archwire 3 on the upper side of the oral cavity and the posterior archwire 4 on both sides or the anterior archwire 3 on the lower side of the oral cavity and the posterior archwire 4 on both sides are the same archwire. .

As a preferred embodiment of the present invention, the anterior archwire 3 has a continuous curved shape of each point.

The anterior archwire 3 is formed into a continuous curved shape as a whole, and the curved shape has no obvious vertices as a whole, which facilitates the movement of the teeth along the anterior archwire 3 during the growth of the appliance, and does not hinder the growth of the teeth.

As a preferred embodiment of the invention, the archwire 6 is provided at the junction of the anterior archwire 3 and the posterior archwire 4.

There is a significant step between the side of the upper cuspidal crown and the bicuspid, so there is an archwire bend 6 at the junction of the anterior archwire 3 and the posterior archwire 4, and the archwire is bent 6 and the anterior teeth. The overall connection of the archwire 3 and the posterior archwire 4 is such that the arch is mushroom-shaped and conforms to the basic anatomy of the lingual side of the tooth. It can be adapted to the wide and thin anterior bracket 1 and the posterior bracket 2 of the bottom plate, which is very beneficial to the improvement of patient comfort.

The individualization of the arch wire is also manifested in the fact that whether the NiTi fine round wire or the square wire bow is used, the arch shape is not only a mushroom shape, but more importantly, the arch wire is made according to the shape of the dental arch after the patient is corrected, and is closely attached to the tongue side of the patient's teeth. . The meaning of setting the posterior archwire 4 as a straight wire arch is that, in addition to the archwire bend 6 between the canine and the bicuspid, the NiTi thin round wire arch for the tooth alignment, regardless of the anterior segment, The posterior segment has no horizontal or vertical curvature, and is in a straight wire bow state. After the arch wire is embedded in each of the archwire grooves 5, the teeth are moved and aligned along the archwire designed by the patient. When the lingual side silk arch of the patient is prefabricated, except for the arch shape and the size of the NiTi thin round wire arch, the anterior and posterior teeth of the lingual side silk arch are in a state of zero smooth straight wire bow. The archwire is made to be made in a simple and convenient way. After the square wire arch is embedded in the archwire groove 5, the front teeth are corrected according to the individualized bracket data, and the posterior teeth can be along the archwire groove by means of the straight posterior archwire 4. 5 Smooth sliding and faster movement, and finally reach the relatively standard high-quality correction standard.

As a preferred embodiment of the present invention, each of the anterior bracket 1 and the posterior bracket 2 is provided with an archwire groove 5, wherein the groove of the anterior bracket 1 has a torque degree and a degree of inclination in the near and far The settings vary from person to person, so-called personalized design or tailor-made, and the corresponding data of the posterior bracket 2 is set based on the best natural data.

As a preferred embodiment of the present invention, the number of the archwire grooves 5 on each of the front tooth bracket 1 or the rear tooth bracket 2 is not less than one.

As a preferred embodiment of the present invention, the archwire groove 5 on each of the anterior bracket 1 and the posterior bracket 2 on the bicuspid is a single-wing structure on the posterior tooth bracket 2 on the first transverse molar. The archwire groove 5 has a double-wing structure, and the archwire groove 5 on the posterior tooth bracket 2 on the second transverse molar is a tongue tube structure.

The posterior teeth of the appliance are semi-personalized and pre-formed, for example, the shape of the lingual side of the two upper cusps is similar to that of the labial side, that is, the individual differences are small, and the posterior bracket 2 of the bicuspid position is thus The groove data can be relatively stable, and the tongue-side brackets with relatively regular groove data can be made like the lip-side brackets to suit the application of the straight wire bow. However, the bracket bottom plate of the posterior tooth bracket 2 is correspondingly designed and matched with the shape of the tongue side of the patient's teeth, and the area is large, so that the bracket groove is not easy to fall off, and the thickness of the bracket is adapted to the molar, and is used for the posterior teeth. Straight silk bow creates the necessary conditions.

The personalized appliance can be manufactured and installed by the following process. Firstly, according to the design requirements of the orthodontist, the teeth are manually operated on the patient's original plaster occlusion model, and the target model after the correction is obtained. Or using laser scanning, copying the patient's anterior occlusion model in a computer, performing simulation correction according to the design requirements of the orthodontist, and obtaining the dentition morphology after the patient is corrected.

On this basis, the patient's anterior teeth personalized lingual bracket and the posterior semi-personalized lingual bracket are designed and manufactured on the modified model. According to the target model after correction, the NiTi thin round individualized straight wire bow or the smooth personalized personalized straight wire bow with zero torque degree required for each period is prepared. In the archwire installation, the anterior archwire 3 is vertically inserted into the archwire groove 5 on the anterior teeth, and the posterior archwire 4 is horizontally inserted into the archwire groove 5 on the posterior teeth, and then snapped into the tongue tube structure. .

As a preferred embodiment of the present invention, the front tooth bracket 1 and the rear tooth bracket 2 are provided with a mesh structure on the contact surface contacting the teeth to increase the front tooth bracket 1 or the rear tooth bracket 2 and The friction between the teeth is conducive to the stability of its installation.

The invention is of course not limited to the embodiments described above, and equivalent variations or substitutions may be made by those skilled in the art without departing from the spirit of the invention, and such equivalents or alternatives are included in the claims of the present application. Within the limits.

Claims

A lingual straight wire arch appliance, comprising: a front tooth bracket (1) mounted on each lingual side, a posterior bracket (2) mounted on each lingual side, and a connection a anterior archwire (3) and a posterior dental archwire (2), the posterior archwire (3) and the posterior archwire (4), the posterior archwire (4) being a straight archwire, the front The archwire (3) is a curved archwire, and the junction of the anterior archwire (3) and the posterior archwire (4) is provided with an archwire bend (6), each of the anterior brackets ( 1) and the bracket base surface of the posterior bracket (2) is a curved surface matching the lingual anatomical surface of the anterior or posterior teeth of the anterior or posterior bracket (2). .
The lingual straight wire arch appliance according to claim 1, characterized in that: the anterior archwire (3) on the upper side of the oral cavity and the posterior archwire (4) on both sides or the front of the lower side of the oral cavity. The archwire (3) and the posterior archwire (4) on both sides are the same archwire.
The lingual straight wire arch appliance according to claim 1 or 2, characterized in that the anterior archwire (3) is a continuous curved shape of each point.
The lingual straight wire arch dental appliance according to claim 1 or 2, wherein each of the front tooth bracket (1) and the rear tooth bracket (2) is provided with an archwire groove (5) ).
The lingual straight wire arch appliance according to claim 4, wherein the number of archwire grooves (5) on each of the anterior brackets (1) or the posterior brackets (2) is not Less than one.
The lingual straight wire arch appliance according to claim 4, characterized in that: each of the anterior brackets (1) and the archwire groove on the posterior bracket (2) on the bicuspid ( 5) a single-wing structure, the archwire groove (5) on the posterior tooth bracket (2) on the first transverse molar is a double-wing structure, and the posterior tooth bracket on the second transverse molar (2) The upper archwire groove (5) is a tongue tube structure.
The lingual straight wire arch dental appliance according to claim 1 or 2, wherein the front tooth bracket (1) and the rear tooth bracket (2) are provided on a contact surface contacting the teeth. There is a textured structure.