CN114343889A

CN114343889A - Orthodontic device and manufacturing method thereof

Info

Publication number: CN114343889A
Application number: CN202210132024.7A
Authority: CN
Inventors: 邓鸿达
Original assignee: Chengdu Yidekang Technology Co ltd
Current assignee: Chengdu Yidekang Technology Co ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-04-15
Anticipated expiration: 2042-02-14
Also published as: CN114343889B

Abstract

The invention provides an orthodontic device and a preparation method thereof, and relates to the technical field of tooth correction. The device includes: 1) an attachment body adhesively attached to a patient's tooth; the attachment fixes the strip through a locking mechanism, and the attachment can dynamically deform based on the pressure action to adapt to the insertion or removal of the strip; 2) a band fixed to the attachment to provide a force to move the teeth, the band and the attachment being in contact connection by a locking mechanism. The attachment of the present invention is dynamically deformable to facilitate insertion and removal of the strap, and the strap and attachment can be securely joined without additional manipulation processes, making manipulation simple. Meanwhile, the orthodontic device of the invention can enable the wearing period of each strip to be shorter so as to realize better accurate control on tooth movement and enable a patient to have better comfort. The wearing of the strip does not affect the occlusal surface of the teeth, so that the teeth can be corrected more accurately. In addition, the strip is easy to three-dimensionally print a finished product, and the production efficiency is greatly improved.

Description

Orthodontic device and manufacturing method thereof

Technical Field

The invention relates to the technical field of tooth correction, in particular to a customized and personalized tooth orthodontic device and a manufacturing method thereof, and a user can clamp teeth in sequence to achieve the aim of aligning the teeth quickly, efficiently and effectively.

Background

Currently, there are two major types of tooth position correction systems on the market:

the first type of orthodontic system is a braces system comprising brackets and steel wires, the brackets being prefabricated, which are glued to the patient's teeth, with a wire groove or tube for placing the steel wire on each bracket, and then the steel wire is fixed using rubber bands or self-locking orthodontic brackets. Since the wire is connected to the bracket, it can directly provide power to the teeth to move the teeth. Typically a set of wires, circular or rectangular or square in cross-section, is used, and the physician typically visits the patient once every two months to adjust the treatment by replacing a different set of wires or bending the existing wires to reinstall them into the bracket wire slots, or even by replacing the bracket. In this dental brace system, the moving force comes from the connection and contact of the wire to the bracket wire slot, which is 0.022 inches wide. Figure 1A shows a cross-sectional view of a prior art dental brace system and the working principle of a bracket and wire in which a wire 101 is placed and glued into a bracket wire slot 102 and the wire is twisted to push against the bracket wire slot side walls to provide the motive force. As shown in fig. 1A, the wire slot 102 is very narrow, the torque arm of the wire twisting torque is the width of the slot, and the slot width 103 is set at 0.022 inches, which provides a very short arm length for the required torque. The force applied by the steel wire is limited, and the force arm is small, so that the generated moment can not meet the required torque movement. In addition, because the wire is made of metal, it is also difficult to bend to achieve the desired mesial and distal movement, sometimes requiring expansion or contraction along the arch with an aid such as a powered arm, rubber band, or spring. This procedure is state of the art, difficult to adapt and uncomfortable or even painful for the patient. While various companies have attempted to provide solutions using digital technology, for example, oramtrix has a bender that is adaptable to a variety of wire bending processes, while Harmony is attempting to design a custom bracket pad for increased adhesion to the teeth, such braces systems typically require an odontosomist who is well acquainted with the placement of the bracket and how to properly place and bend the wire. In such braces systems, the interface of the wire with the bracket is very important because an error in one hair may result in different tooth movement results.

A second type of orthodontic system is a invisible appliance system, and fig. 1B shows a partial cross-sectional view of a prior art invisible appliance system and its working principle, which includes an attachment 111 and appliances 112, wherein the attachment 111 is physically adhered to the teeth of a patient, similar to a bracket in a braces system, a series of appliances 112 are placed on the teeth, and force is applied to the attachment on a contact basis, and the appliances are slightly different in shape in order to provide force to move the teeth. Orthotics are typically designed through computer-aided modeling processes and produced based on digital modeling. The process flow is as follows: firstly, making a impression of dentition of a patient or using a scanner in a tooth mouth; then, a series of male molds are produced as CAD file output, usually in STL format; then, 3D printing of a physical tooth model and a mold is carried out by utilizing the files; finally, a clear sheet of thermoplastic is formed on top of the mold to make the plastic shell mold. The shell model is then cut, and the edges are polished, marked, cleaned, and sterilized before being packaged and provided for the patient. However, one of the difficulties with invisible appliance systems is the accurate installation of attachments based on digital scanning, which are typically installed using an adhesive template that the practitioner places in the cavity formed by the attachment, places the template against the tooth, and then adheres it to the tooth by UV curing the sealant. Because of the tackiness of the sealant, it can easily flow out of the form, and therefore, additional flushing or cleaning is often required. And the cured attachment may not exhibit the desired attachment shape due to the flow of sealant material. Such inaccuracies may deviate from treatment regimens because the attachment provides the critical contact to the restoring force of the teeth, as it does not provide the force required as a digital design. This situation can lead to restarting of the treatment or additional orthotics being installed, as the treatment is not performed as planned. This results in wasted material, increased chair-side working time for the doctor and increased treatment time.

Furthermore, in many cases, the appliance may provide additional material on the occlusal surface, which may cause a change in the bite point between the maxilla and mandible, and in particular may cause the occlusal surface to be guided towards the posterior molars. This opens the patient's bite and tends to bite the posterior molars due to unbalanced bite forces on the posterior molars. This unbalanced bite force can lead to temporomandibular joint (TMJ) problems after appliance removal, and some patients may not speak as they had previously experienced naturally.

Disclosure of Invention

The invention aims to provide an orthodontic device and a manufacturing method thereof, and aims to solve the technical problem that a tooth position correcting system in the prior art is complex to operate. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides an orthodontic device, comprising:

an attachment body to be attached to a patient's tooth; the attachment body fixes the strip through a locking mechanism, and the attachment body can be dynamically deformed based on the pressure action so as to adapt to the insertion or removal of the strip; and

a strip fixed to the attachment to provide a force to move the teeth, the strip being a band-like structure disposed along a contour of the tooth surface, the strip and the attachment being in contact connection by the locking mechanism.

According to a preferred embodiment, the locking mechanism is a recess provided on the attachment for securing or locking the strip, so that the strip creates a grip on the attachment secured to the tooth.

According to a preferred embodiment, the attachment body comprises an intermediate part which is a bendable ring, wherein the intermediate part is deformable downwards to have a first state facilitating insertion of the strip and is deformable upwards to have a second state facilitating removal of the strip, and wherein a groove is provided in the ring near its bottom for securing the strip.

According to a preferred embodiment, the device further comprises side parts on both sides of the intermediate part, which side parts are at a lower level than the intermediate part, and recesses for fixing straps are provided on the outer sides of the side parts near the bottom thereof.

According to a preferred embodiment, the attachment is customized to conform to the contour of the patient's tooth surface.

According to a preferred embodiment, the attachment is arranged on a tooth on the lingual side of the patient, the strip flows over the lingual side of the tooth and the two ends extend in the direction of the posterior teeth; or,

when the attachment is arranged on the teeth on the lingual side of the patient, the strip flows through the lingual side of the teeth with both ends extending in the direction of the posterior teeth, and is snapped onto the posterior teeth at the ends of the strip by means of mouthpiece structures connected to the strip; or,

when the attachment is arranged on the teeth on the tongue side of the patient, the strip flows through the tongue side of the teeth, the two ends of the strip extend towards the direction of the posterior teeth, and the strip is fixed on the posterior teeth through a fixing frame connected with the strip at the tail end of the strip; one end of the fixing frame is detachably connected with the strip, and the other end of the fixing frame extends to the buccal side face of the posterior tooth; or,

when the attachment is placed on the teeth on the lingual side of the patient, the strip is placed so as to cover the lingual surfaces of the teeth, and in the posterior position, both ends of the strip extend to the buccal side around the posterior teeth at the rearmost end.

According to a preferred embodiment, the attachment body is provided on a tooth on a buccal side of a patient, the strip flows through the buccal side of the tooth with both ends extending in a posterior direction, or,

when the attachment is placed on a tooth on the buccal side of a patient, the strip flows over the buccal surface of the tooth and snaps onto the posterior tooth at the end of the strip by means of a mouthpiece structure connected to the strip, or,

when the attachment is placed on teeth on a buccal side of a patient, the strip is placed over buccal surfaces of the teeth, and in a posterior position, the strip extends around a posterior tooth at a posterior most end to a lingual side.

According to a preferred embodiment, when the strip is disposed to cover the lingual or buccal surface of the tooth, the strip has a crown expansion portion capable of covering the abutment portion of the tooth, the crown expansion portion being used to apply a force to the abutment portion of the tooth.

According to a preferred embodiment, the strap is provided with an accommodating opening for accommodating the attachment, notches which are arranged at four corners of the accommodating opening and communicated with the accommodating opening, and slots which are arranged near the four sides of the accommodating opening, the strap forms a clamping strip which can be locked to a locking structure of the attachment among the accommodating opening, the notches and the slots, and the accommodating opening is used for enabling the strap to be bent outwards to generate a bounce force after the strap is locked to the attachment by pressing the clamping strip and is locked in place.

According to a preferred embodiment, the strips comprise a plurality of strips arranged in sequence and provided with indicia, each strip being provided with a hole allowing a printable shaped thread to pass through,

the cord further comprises a printable and formed blocking head, and the blocking head is arranged in the hole to prevent the cord from being pulled out.

According to a preferred embodiment, the dental attachment further comprises a cementing template, the shape of which is in accordance with the outline of the tooth profile, for cementing the attachment to the tooth through the cementing template, the cementing template being capable of being individually provided on each tooth; the bonding template and the attachment are printed into an integrally formed structure through SLS; or the bonding template and the attachment form detachable connection.

The invention also provides a manufacturing method of the orthodontic device, which comprises the following steps:

scanning dentitions of a patient and outputting an electronic file;

the design software loads the electronic file and designs the positions of the attachments and the strip layout corresponding to the positions so as to design or select the attachments most suitable for the teeth of the patient;

designing a special bonding template based on the attachment;

manufacturing the bonding template through an SLS printing process, and placing an attachment on the bonding template; or a bonding template which is integrally formed with the attachment is manufactured through an SLS printing process;

adhering the attachment to the tooth by using the adhering template;

a series of strips is made based on the designed strip layout.

Based on the technical scheme, the orthodontic device and the manufacturing method thereof at least have the technical effects that:

the orthodontic appliance of the invention comprises a dynamic attachment and a strip, the dynamic attachment being generally placed on the lingual side of the teeth to be attached to the teeth of the patient; and the attachment body can be dynamically deformed based on the pressure to accommodate insertion or removal of the strap; the attachment body is fixed with a strip through a locking mechanism, the strip is fixed on the attachment body to enable the attachment body to have firm gripping force so as to provide force for moving teeth, the strip is of a strip-shaped structure arranged along the surface contour of the teeth, and the strip and the attachment body are in contact connection through the locking mechanism. When the strip passes through locking mechanism lock to the attachment on, strip and attachment can produce firm combination, need not other operation process and other auxiliary assembly for easy operation, convenient to use. While the straps of the present invention are removable, and are generally a series of structures, each strap can be worn for less time to achieve better control of tooth movement, while providing better patient comfort.

In another aspect, the locking mechanism of the attachment in the orthodontic appliance according to the embodiment of the present invention is a recess provided on the attachment for fixing or locking the strip so that the strip is fastened to the attachment through the recess and generates a gripping force to the attachment fixed to the tooth. Therefore, by snapping the strap onto the attachment, the moment arm of the strap torque is the size of the attachment, which is larger due to its longer dimension relative to the width of the bracket wire slot of prior art dental brace systems, thus making it easier to provide a controllable torque with less force required by the strap.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1A is a cross-sectional view of a prior art dental band system;

FIG. 1B is a partial cross-sectional view of a prior art contact orthotic system;

fig. 2 is a cross-sectional view of the orthodontic appliance of the invention;

fig. 3 is three orthographic views of a preferred embodiment of an attachment in the orthodontic correction device of the present invention;

fig. 4A is a schematic view of a preferred embodiment of a strip design in the orthodontic correction device of the present invention;

FIG. 4B is a schematic view of another preferred embodiment of a design of a strap in the orthodontic appliance of the invention;

fig. 5 is a schematic view showing a fixing manner of a band in the orthodontic correction apparatus of the present invention;

fig. 6 is a schematic view showing a preferred example of a detachable connection structure of a strip and a mount in the orthodontic correction device of the present invention;

FIG. 7 is a schematic view of another preferred embodiment of a design of a strap for an orthodontic appliance of the invention;

fig. 8A is a schematic view of yet another preferred embodiment of a strip design in the orthodontic correction device of the present invention;

fig. 8B is a schematic view of another preferred embodiment of a strip design in the orthodontic correction device of the present invention;

fig. 9 is a schematic view of yet another preferred embodiment of a design of a strip in the orthodontic correction device of the invention;

fig. 10 is a schematic view of yet another preferred embodiment of a design of a strip in the orthodontic correction device of the invention;

fig. 11 is a schematic view of a preferred embodiment of a strip of the orthodontic correction device of the present invention;

FIG. 12 is a schematic illustration of a method of smoothing the surface of a strip of the present invention;

fig. 13 is a schematic view of a series of strips connected in series in the orthodontic correction device of the invention;

fig. 14 is a schematic view illustrating a method of treating an attachment in the orthodontic correction apparatus of the present invention;

fig. 15 is a schematic view of a preferred embodiment of attachment in the orthodontic correction device of the present invention;

fig. 16 is three orthographic views of an attachment and a bonding template in the orthodontic correction device of the present invention;

FIG. 17 is a schematic view of a preferred embodiment of an attachment adhesive template of the present invention installed;

fig. 18 is a schematic view illustrating a manner in which an attachment is removed in the orthodontic device of the invention;

FIG. 19 is a preferred embodiment of a method of making an orthodontic appliance of the invention;

fig. 20 is still another preferred embodiment of the method for manufacturing the orthodontic appliance of the invention;

fig. 21 is still another preferred embodiment of the method for manufacturing the orthodontic appliance of the invention.

In the figure: 101-steel wire; 102-carrier trunking; 103-wire groove width; 111-an accessory; 112-an appliance; 121-an adherent; 122-a recess; 123-strips; 124-attachment height dimension; 130-chute; 302-a mount; 303-a hinge structure; 304-a connecting arm; 305-a socket; 401 — an intermediate member; 402-a first state; 403-a second state; 404-a groove; 405-side components; 406-a recess; 602-posterior teeth; 742-a crown extension; 752-receiving port; 753-slot; 754-a notch; 755-card strip; 761-a first surface; 762 — a second surface; 763-sand blasting cleaning device; 772-line ropes; 781-dental surfaces; 782-template curve; 783-box normal; 784-new curve; 801-integral structure; 802-detachable structure; 803-connecting piece; 901-bonding a template; 902-thin rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

The technical scheme of the invention is explained in detail in the following with the accompanying drawings of the specification.

Example 1

As shown in fig. 2, the present invention provides an orthodontic appliance, comprising: the attachment body 121, the attachment body 121 adheres to the patient's tooth. The attachment body 121 can be dynamically deformed based on the pressure to accommodate insertion or removal of the strap 123. The attachment 121 secures the strip 123 by a locking mechanism such that the strip 123 creates a firm grip to be applied to the attachment secured to the teeth. When buckling the strip 123 to the attachment through the locking mechanism, the strip and the attachment can be firmly combined without other operation processes and other auxiliary equipment, so that the operation is simple and the use is convenient. The attachment of the invention is capable of dynamic deformation based on pressure, which is very convenient for the patient to mount or dismount the strap without further assistance. And a strip 123, wherein the strip 123 is fixed on the attachment body 121 to provide the force for moving the teeth, the strip 123 is a belt-shaped structure arranged along the contour of the surface of the teeth, and the strip 123 and the attachment body 121 are in contact connection through a locking mechanism. Preferably, the strip 123 is disposed to closely follow the curvature of the tooth surface, and the strip 123 is firmly fixed to the attachment body 121 to provide an effective force for tooth movement. The straps of the present invention are removable and are typically a series of structures that enable each strap to be worn for less time to achieve better control of tooth movement while providing better patient comfort. The strip is made of flexible materials, has the function similar to that of an expander or a spring or a rubber band, does not need any auxiliary device and is convenient to use. Preferably, the strip and the attachment body of the present invention are made of nylon material.

Preferably, as shown in fig. 2, the locking mechanism is a recess 122 provided on the attachment body 121 for fixing or locking the strap 123, so that the strap 123 is snapped onto the attachment body 121 through the recess 122 and generates a gripping force to the attachment body 121 fixed to the teeth. In this application, the strap is snapped onto the attachment body through the recess, and the moment arm of the strap torque is the attachment body height dimension 124. Preferably, the attachment height dimension 124 is at least 0.1 inch, more than 5 times the width of the bracket wire slot in the dental brace system, so that the strap in this application has a longer wrench arm, thus requiring less force and making controllable torque easier.

Preferably, as shown in fig. 3, the attachment body 121 comprises an intermediate part 401, the intermediate part 401 being a bendable ring, wherein the intermediate part 401 is deformable downwards to have a first state 402 in which the strip 123 is embedded and deformable upwards to have a second state 403 in which the strip 123 is removed, and wherein a recess 404 is provided near the bottom of the ring, the recess 404 acting as a locking mechanism, the recess 404 being adapted to secure the strip 123. Preferably, the attachment body 121 further comprises side members 405 on both sides of the middle member 401, the side members 405 having a lower height than the middle member 401 to facilitate the insertion of the strap so that the insertion of the strap does not interfere much. On the outside of the side piece 405, near its bottom, there is a recess 406 for the fixing strip 123. The recess 406 acts as a locking mechanism to hold the strap in place.

The attachment of the present application is dynamically deformable to facilitate insertion and removal of the strap. Preferably, the attachment of the present invention is made of a material selected from the group consisting of: a tensile modulus of more than 1500MPa, a tensile strength of more than 40MPa, a high elongation at break of, for example, 15%; a flexural modulus of 1500MPa, a Charpy impact strength of 50KJ/m and a Charpy notched impact strength of approximately 5 KJ/m.

The attachment body 121 of the present invention is provided on the teeth on the lingual side of the patient. Alternatively, the attachment body 121 may be preferably provided on teeth on the buccal side of the patient. Preferably, the attachment body 121 of the present invention is made of a material that is transparent or has a color consistent with that of teeth, and can be easily installed and the strip can be inserted and removed when installed on buccal teeth.

As shown in fig. 4A, preferably, when the attachment body 121 is disposed on the patient's lingual tooth, the band 123 flows through the lingual side of the tooth and both ends extend in the posterior direction. As shown in FIG. 4B, FIG. 4B shows another preferred embodiment of the strip 123 of the present invention, preferably, when the attachment body 121 is placed on the patient's lingual tooth, the strip 123 flows through the lingual side of the tooth with both ends extending in the direction of the posterior teeth, and is snapped onto the posterior teeth at the distal end of the strip 123 by means of a mouthpiece structure connected to the strip 123. The posterior tooth may be the last posterior tooth or any one of the posterior teeth in the middle. In this embodiment, the shell structure is a shell that can wrap around the posterior teeth and fit over the posterior occlusal surface 212, and the posterior occlusal surface 212 is designed to minimize occlusal interference. The advantage that so set up lies in: since the strip and the attachment can be hidden at the tongue side, they can be completely hidden.

When the strip is worn on the tooth, depending on the motion of the tooth, the strip overlaps the geometry of the tooth when the tooth needs to be expanded to push the tooth into engagement with the attachment, and when the tooth needs to be moved obliquely, there is a gap between the strip and the tooth surface and the user can push the strip closer to the tooth surface.

Preferably, as shown in fig. 5, when the attachment body 121 is placed on the patient's teeth on the lingual side, the strip 123 flows through the lingual side of the teeth with both ends extending in the direction of posterior teeth, and is fixed to the posterior teeth at the ends of the strip 123 by the fixing brackets 302 connected to the strip 123. Wherein, one end of the fixing frame 302 is detachably connected with the strip 123, and the other end of the fixing frame 302 extends to the buccal side of the posterior teeth. So that the force pushing from the buccal side is generated to the band 123 by the fixing frame 302, which is also equivalent to pulling from the lingual side, to cause the band 123 and the attachment body 121 to engage to generate a moving force to the teeth. Preferably, the fixture is easily visible and aesthetically unpleasing when applied to the anterior teeth, and for this purpose the present application provides for the removable connection of the fixture 302 to the strip 123, so as to separate the fixture 302 from the strip 123 when the strip pulls the teeth to a sufficiently stable position. Preferably, as shown in fig. 6, the fixing frame 302 and the strip 123 can be detachably connected through the hinge structure 303, the hinge structure 303 includes a socket 305 allowing two ends of the fixing frame 302 to be clamped into, in this embodiment, the fixing frame 302 is configured as a frame structure having two connecting arms 304 with certain elasticity and arranged oppositely, the two connecting arms 304 of the fixing frame 302 can be detachably connected with the socket 305, for example, the two connecting arms 304 are pressed, so that the ends of the two connecting arms are inserted into the socket, after the hand is released, the connecting arms 304 are clamped on the socket under the action of their own elasticity to form a connection, and when the fixing frame needs to be removed, the connecting arms are pressed, so that the two connecting arms are separated from the socket. The hinge structure thus enables the mount to be separated from the strip when the strip pulls the tooth to a sufficiently stable position.

Preferably, as shown in fig. 7, fig. 7 shows another preferred embodiment of the strip of the present invention, the strip 123 is disposed to cover the lingual side of the teeth, and in the posterior position, both ends of the strip 123 extend around the posterior tooth 602 of the posterior most end to the buccal side. The arrangement ensures that the strip is more stably arranged on the attachment body and cannot be seen, and meanwhile, the arrangement ensures that the strip cannot cover the occlusal surface, thereby avoiding occlusion interference in the treatment process.

According to another preferred embodiment of the present invention, as shown in fig. 8A and 8B, the band of the present invention may be provided on the buccal side. Preferably, as shown in fig. 8A, the strip 123 of the present invention flows across the buccal side of the tooth with both ends extending in the direction of the posterior teeth. Alternatively, as shown in fig. 8B, when the attachment body 121 is placed on the teeth on the buccal side of the patient, the strip 123 flows through the buccal surface of the teeth, and is snapped onto the posterior teeth, which may be the last posterior tooth or any one of the middle posterior teeth, at the ends of the strip 123 by means of the mouthpiece structure connected to the strip 123. In this embodiment, the mouthpiece structure is a mouthpiece capable of wrapping around the posterior teeth and fitting over the posterior occlusal surface 212, or, as shown in fig. 9, preferably the strip 123 is disposed to cover the buccal side of the teeth, and in the posterior position, the strip 123 extends around the posterior teeth at the rearmost end to the lingual side. The arrangement is to ensure that the strip is more stably arranged on the attachment body, and meanwhile, the strip is arranged not to cover the occlusal surface, so that occlusion interference in the treatment process is avoided.

Note that the strips of the present invention may be arranged in a mixed manner in the form of fig. 4A, 4B, 7, 8A, 8B, and 9. That is, the left and right dental arches may be arranged in different forms.

Preferably, as shown in fig. 10, when the strip 123 is disposed to cover the lingual or buccal surface of the tooth, the strip 123 has a crown expansion part 742 capable of covering a large number of tooth abutment portions, and the crown expansion part 742 is used to apply force to the tooth abutment portions when the arch dentition is entirely moved backward or the tooth is moved obliquely. The crown extension is suitable for use when it is desired to apply force to a tooth abutment, such as when the arch cusp array is pushed backward or when the tooth is tilted. In some cases, it may be desirable to cover more or even the entire lingual or buccal side.

Preferably, as shown in fig. 11, in order to ensure that the strap and the attachment body are easily fastened, the strap 123 is provided with a receiving opening 752 for receiving the attachment body 121, notches 754 provided at four corners of the receiving opening 752 and communicating with the receiving opening 752, and slots 753 provided near four sides of the receiving opening 752. The strap 123 forms a snap strip 755 that can be locked to the locking structure of the attachment body 121 between the receiving opening 752, the indentation 754 and the slot 753, wherein the slot 753 and the indentation 754 function to provide a relief for the snap strip 755 to be snapped onto the attachment body, and the receiving opening 752 is used to allow the strap 123 to flex outwardly creating a spring-back force after being locked to the attachment body 121 by pressing the snap strip 755 and locked in place. Such that the strip and the attachment body engage and provide the necessary movement force for movement of the teeth.

The strip of the present invention is printed by SLS, however SLS 3D printing typically produces a film on the surface, making the surface thereof non-smooth, and cheeks or tongues may feel uncomfortable touching the non-smooth surface, thus requiring a smoothing process. As shown in fig. 12, fig. 12 shows a schematic view of a surface smoothing process, during printing, the layout of each strip is known, and comprises a first surface 761 directly contacting with teeth and a second surface 762 not directly contacting with teeth, and the second surface 761 not directly contacting with teeth is smoothed by sandblasting or steam fusion by a sandblasting device 763, while the first surface 761 directly contacting with teeth is not smooth and does not need to be smoothed, so that the original accuracy is maintained, and errors caused by the smoothing process are not introduced. Furthermore, a certain roughness can give the strip more frictional contact, contributing to better movement of the teeth.

Preferably, as shown in fig. 13, the strips comprise a series of sequentially arranged strips bearing indicia, each strip 123 being provided with an aperture allowing a printable shaped thread 772 to pass therethrough. The cord 772 may also include a print formed plug that is positioned within the hole to prevent the cord from being pulled out. The strip can be used in sequence through the structure, and the user can pull out the strip one by one only by cutting off the cord.

Preferably, the attachment body 121 can be customized to conform to the contour of the patient's tooth surface. As shown in fig. 14, fig. 14 illustrates how the attachment can be customized to conform to the contour of the tooth surface by first placing a fixed template on the tooth surface 781, showing only one template curve 782 in fig. 14, calculating the normal to the template after placement is complete, which can be done by averaging the four box normals 783 or finding the center normal, deforming the box to slide the template curve 782 along the normal into contact with the tooth surface, which, when complete, will result in the formation of an accurate attachment along the tooth surface, and, as an example, a new curve 784. In addition to deforming the fixed template along the tooth surface, the template may also be sized in a horizontal or vertical direction to achieve customization of the attachment.

It should be noted that, in application, a plurality of attachments may be used, and fig. 15 shows the installation manner of a plurality of attachments 121 arranged in the horizontal or vertical direction of the teeth.

Preferably, in order to allow the attachment to be accurately mounted on the tooth, an adhesion template 901 is further included, and the shape of the adhesion template 901 is matched with the outline of the tooth profile so as to adhere the attachment to the tooth through the adhesion template, and the adhesion template can be separately provided on each tooth. FIG. 16 shows a schematic view of one embodiment of an attachment adhesive template of the present invention, the adhesive template being printed with an attachment 121 by SLS in an integrally formed structure 801; after bonding, the bonding template can be torn off or removed, leaving the attachment on the tooth. In another preferred embodiment, the adhesive template and the attachment 121 are formed into a detachable structure 802 by SLS printing, and when the attachment is adhered to the tooth, the template is pulled out from one direction and removed to adhere the attachment to the tooth. Preferably, there is a connection 803 between the glued template and the attachment body 121, the connection 803 in interlocking contact with the attachment body falling off and losing its locking action after pulling the template out. Such a detachable connection structure can be easily implemented by SLS printing technology. Such an arrangement may result in reduced rinsing of the sealant.

Fig. 17 shows that attachment cement templates 901 can be provided individually on each tooth, as in the baffle-like structure shown in fig. 17, with two adjacent cement templates 901 connected by a thin rod 902. Such an arrangement may allow the user to select a desired template or portion of the template for printing, and even later for printing, particularly for teeth that are too obstructed by adjacent teeth and for which cleaning of the adjacent teeth is required prior to attachment of the attachment. Sometimes a user can print in their own set and then divide them into smaller portions as desired.

The attachment of the present invention is designed to be easily removed by an attachment removing tool, and as shown in fig. 18, both sides of the attachment 121 are provided with inclined grooves 130, and the inclined grooves 130 are arranged in a manner that the opening is gradually enlarged from the inside to the outside, so that the attachment can be easily gripped and removed by a direct removing tool.

Example 2

This embodiment provides a method for manufacturing the orthodontic appliance of the aforementioned embodiment 1, as shown in fig. 19, including the steps of:

scanning dentitions of a patient and outputting an electronic file;

the design software loads the electronic file and designs the position of the attachment and the strip layout corresponding to the position; designing a special attachment or a bonding template integrally formed with the attachment based on the position of the attachment;

manufacturing an integrally formed template through an SLS printing process;

adhering the attachment to the tooth by using the integrally formed template;

a series of strips is made based on the designed strip layout.

And then delivered to the patient, who wears the teeth sequentially for the purpose of straightening the teeth.

Example 3

This embodiment provides a method for manufacturing the orthodontic appliance of the aforementioned embodiment 1, as shown in fig. 20, comprising the steps of:

scanning dentitions of a patient and outputting an electronic file;

the design software loads the electronic file and designs the position of the attachment and the strip layout corresponding to the position of the attachment, and designs or selects the most suitable attachment;

designing a special bonding template based on the attachment;

manufacturing the bonding template through an SLS printing process;

placing an attachment on the bonding template;

adhering the attachment to the tooth using the template;

a series of strips is made based on the designed strip layout.

Example 4

This embodiment provides a method for manufacturing the orthodontic appliance of the aforementioned embodiment 1, as shown in fig. 21, including the steps of:

scanning dentitions of a patient and outputting an electronic file;

the design software loads the electronic file and designs the position of the attachment and the strip layout corresponding to the position, and designs and selects the most suitable attachment;

designing a special bonding template based on the attachment;

manufacturing the bonding template through an SLS printing process or a thermoforming process;

placing the sealant in the pores of the attachment opposite to the template;

placing the template on the patient's teeth; after the sealant is cured, a corresponding attachment is formed and adhered to the teeth of the patient;

a series of strips is made based on the designed strip layout.

The orthodontic appliances of the present invention have at least the following advantages over existing braces and invisible appliances systems:

1. the present invention employs attachments that are fixed to the teeth and are dynamically deformable when the strip is inserted into or removed from the attachment.

2. The strip of the present invention follows the contour of the tooth surface, making the fixation more stable and producing the required precise force.

3. The attachment of the present invention can be easily removed by a removal tool.

4. The strap of the present invention need only be snapped onto the attachment body without additional connections.

5. The attachment of the invention has more flexibility in placement, different placement being complemented by the design of different strips, which is useful for certain special situations, such as where the face-axis angle of a clinical crown is blocked by another tooth.

6. The force applied by the present invention comes from a strap that snaps onto the attachment, which has a wider moment arm than the bracket wire slot.

7. The orthodontic appliances of the invention can be changed very frequently, usually once a week is recommended, which is a significant advantage because a higher frequency of change means more accurate movements and more predictable results.

8. The orthodontic device of the invention wherein the strip is removable provides better oral hygiene and easier dental and flossing.

9. The orthosis of the present invention has little bite interference and therefore does not need to be removed when eating.

10. The orthodontic appliance of the invention is very comfortable because each strip produces very little movement. Also, the strip of the present invention does not need to cover the entire crown, allowing more air to flow than a hidden appliance.

11. The orthodontic appliance of the present invention can easily treat teeth in growth.

12. The tape of the present invention is typically printed by a selective laser sintering process, and most of the material can be recycled for future printing, so it is environmentally friendly.

13. The belt of the invention is made of PA11 or PA2 nylon material, and is safe and reliable to clean.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. An orthodontic appliance, comprising:

an attachment body (121), wherein the attachment body (121) is adhesively attached to a patient's tooth; the attachment body (121) fixes the strap (123) through a locking mechanism, and the attachment body (121) can be dynamically deformed based on the pressure action to adapt to the embedding or removing of the strap (123); and

a strip (123), the strip (123) being fixed to the attachment body (121) to provide a force for moving the teeth, the strip (123) being a strip-like structure arranged along the contour of the tooth surface, the strip (123) and the attachment body (121) being in contact connection by the locking mechanism.

2. Orthodontic appliance according to claim 1, characterized in that said locking means are recesses (122) provided on said attachment body (121) for fixing or locking said strips (123) so that said strips (123) generate a gripping force on said attachment body (121) fixed to the teeth.

3. Orthodontic appliance according to claim 2, characterized in that said attachment body (121) comprises an intermediate part (401), said intermediate part (401) being a bendable ring, wherein said intermediate part (401) is deformable downwards to have a first configuration (402) for the insertion of said strip (123) and is deformable upwards to have a second configuration (403) for the removal of said strip (123), a groove (404) being provided in said ring near its bottom, said groove (404) being intended to fix said strip (123).

4. Orthodontic appliance according to claim 3, characterized in that it further comprises side members (405) on either side of said intermediate member (401), said side members (405) having a lower height than said intermediate member (401), recesses (406) being provided on the outer side of said side members (405) near the bottom thereof for fixing the strips (123).

5. The orthodontic appliance of claim 1, characterized in that said attachment body (121) is customized to conform to a patient's tooth surface contour.

6. The orthodontic appliance according to claim 1, wherein said attachment body (121) is provided on a tooth on a lingual side of a patient, said strip (123) flowing through the lingual side of the tooth with both ends extending in a posterior direction; or,

when the attachment (121) is placed on the teeth on the lingual side of the patient, the strip (123) flows over the lingual side of the teeth with both ends extending in the direction of the posterior teeth, and is snapped onto the posterior teeth at the ends of the strip (123) by means of a mouthpiece structure connected to the strip (123); or,

when the attachment (121) is placed on a tooth on the lingual side of a patient, the strip (123) flows over the lingual side of the tooth with both ends extending in the direction of posterior teeth, and is fixed to the posterior teeth at the ends of the strip (123) by means of a fixture (302) connected to the strip (123); wherein one end of the fixing frame (302) is detachably connected with the strip (123), and the other end of the fixing frame (302) extends to the buccal side surface of the posterior tooth; or,

when the attachment body (121) is placed on the patient's lingual teeth, the strip (123) is placed so as to cover the lingual surfaces of the teeth, and in the posterior position, both ends of the strip (123) extend to the buccal side around the rearmost posterior tooth (602).

7. The orthodontic appliance according to claim 1, wherein the attachment body (121) is provided on a tooth on a buccal side of a patient, the band (123) flows through the buccal side of the tooth and both ends extend in a posterior direction, or,

when the attachment body (121) is placed on a tooth on the buccal side of a patient, the strip (123) flows across the buccal surface of the tooth and is snapped onto the posterior teeth at the end of the strip (123) by means of a mouthpiece structure connected to the strip (123), or,

when the attachment body (121) is placed on teeth on the buccal side of a patient, the strip (123) is placed so as to cover the buccal surface of the teeth, and in the posterior position, the strip (123) extends to the lingual side around the posterior tooth (602) at the rearmost end.

8. The orthodontic appliance according to claim 6 or 7, characterized in that when the strip (123) is disposed to cover the lingual or buccal surface of the tooth, the strip (123) has a crown expansion portion (742) capable of covering the tooth abutment portion, the crown expansion portion (742) being used to apply force to the tooth abutment portion.

9. The orthodontic appliance according to claim 1, characterized in that said band (123) is provided with a receiving opening (752) for receiving said attachment body (121), notches (754) provided at four corners of said receiving opening (752) and communicating with said receiving opening (752), and slots (753) provided near four sides of said receiving opening (752), said band (123) forming, between said receiving opening (752), said notches (754) and said slots (753), locking strips (755) which can be locked to locking structures of said attachment body (121), said receiving opening (752) being adapted to allow said band (123) to bend outwardly to generate a counter-spring force after being locked to said attachment body (121) by pressing said locking strips (755) and locked in place.

10. The orthodontic appliance according to claim 1, characterized in that said bands (123) comprise a plurality of bands arranged in sequence and provided with markings, each band (123) being provided with holes allowing the passage of a printable shaped strand (772),

the strand (772) further comprises a printable blocking head, and the blocking head is arranged in the hole to prevent the strand (772) from being pulled out.

11. The orthodontic appliance according to claim 1, further comprising a bond template (901), the bond template (901) having a shape conforming to a contour of a tooth profile to bond the attachment body (121) to the tooth through the bond template (901), the bond template (901) being individually provided on each tooth; the bonding template (901) and the attachment body (121) are printed to form an integral structure through SLS; or the bonding template (901) and the attachment body (121) form a detachable connection.

12. A method of making an orthodontic appliance, comprising the steps of:

scanning dentitions of a patient and outputting an electronic file;

designing a special bonding template based on the attachment;

adhering the attachment to the tooth by using the adhering template;

a series of strips is made based on the designed strip layout.