A composite braces-type appliance with multiple mechanical properties

Abstract

The present invention discloses a composite braces-type orthodontic appliance with multiple mechanical properties, including a plurality of composite braces-type orthodontic appliance units, wherein the composite braces-type orthodontic appliance units include: a lingual auxiliary retention structure designed and manufactured by computer aided design, wherein the lingual auxiliary retention structure is sleeved on the outside of the orthodontic teeth; a group of lingual auxiliary force-adding devices designed and manufactured by computer aided design, wherein the lingual auxiliary force-adding devices are arranged on the inside of the lingual auxiliary retention structure; the lingual auxiliary force-adding device is bonded to at least a part of the lingual auxiliary retention structure; and the lingual auxiliary force-adding device has a plurality of continuous or discontinuous units. The present invention has the following technical effects: it does not change the most important features of transparent braces: no brackets, transparent (especially the labial side of the front teeth), and comfortable. It improves its mechanical characteristics and combines the advantages of alloy materials with transparent braces.

Description

Technical Field

[0001] The invention relates to a dental appliance, in particular to a composite dental brace-type appliance with multiple mechanical properties, belonging to the technical field of medical devices. Background Art

[0002] In 1990, adult patients accounted for almost 25% of all orthodontic patients. This trend is due to the increase in the number of orthodontic patients over the age of 40. Most adult patients are more concerned about the appearance of orthodontic appliances. Today, there is a great demand for aesthetic orthodontic appliances. The metal brackets used in traditional fixed orthodontics are not beautiful; the emergence of ceramic brackets has improved the aesthetic effect of fixed orthodontics to a certain extent, but there are still steel wires, and they are large and fragile; lingual braces are more beautiful, but the comfort and oral hygiene are not optimistic, and the technical requirements are extremely high. "Transparent braces" are appliances without bracket structures. They are not only almost invisible, but also greatly reduce the foreign body sensation. They have been widely promoted in recent years.

[0003] However, its poor mechanical properties lead to a narrow application range, and it is difficult to correct side effects after they occur. This brings trouble and pain to many doctors and patients. In addition, due to the decay of braces materials, it cannot provide long-term gentle and stable orthodontic force; traditional braces generally take about 2 years to correct, and need to be adjusted in the hospital every 1-2 weeks. Whether it is a metal bracket, a ceramic bracket or a lingual bracket, the part that actually generates orthodontic force is the "wire", which is made of titanium alloy, stainless steel alloy, etc. According to the needs of treatment, the most suitable orthodontic wire with elasticity and rigidity can be replaced to load the most appropriate continuous and gentle orthodontic force.

[0004] Despite the emergence of a variety of new materials and design solutions, the shortcomings of excessive initial force and short duration cannot be solved. This is contrary to the concept of continuous and light force. In addition, due to the inherent characteristics of its morphology, its force-adding effect in a specific direction is poor, and the treatment plan carried by the appliance cannot be expressed in the patient's body.

[0005] In summary, the rigidity and elasticity of bracketless invisible braces bring corresponding problems to their application. Summary of the invention

[0006] In view of the defects in the above-mentioned prior art, the present invention provides a composite brace-type orthodontic appliance with multiple mechanical properties. The mechanical properties of the bracketless invisible orthodontic appliance can be improved by composite application of multiple materials: according to the different stages of correction and the movement of teeth, auxiliary force devices of different materials and structures are designed, so as to achieve the purpose of continuous and gentle orthodontic force, increase the correction efficiency of the bracketless invisible orthodontic appliance, improve safety, and reduce complications.

[0007] The objective of the present invention is achieved through the following technical solutions:

[0008] A composite braces-type appliance unit having multiple mechanical properties, comprising:

[0009] A lingual auxiliary retention structure designed and manufactured by computer aided design, wherein the lingual auxiliary retention structure is sleeved on the outside of the orthodontic tooth;

[0010] A set of lingual auxiliary force-adding devices designed and manufactured by computer aided design, wherein the lingual auxiliary force-adding devices are arranged on the inner side of the lingual auxiliary retention structure; the lingual auxiliary force-adding devices are attached to at least a part of the lingual auxiliary retention structure;

[0011] The lingual auxiliary force-applying device has a plurality of continuous or discontinuous units.

[0012] The dental braces-type orthodontic appliance unit has several groups, counted as: unit 1, unit 2, ..., and each unit is designed by computer aid, forming a series of continuous orthodontic devices.

[0013] At least a portion of the inner contour of the lingual auxiliary retention structure matches the outer contour of the lingual auxiliary force-applying device.

[0014] The tongue side auxiliary force adding device is made of alloy material.

[0015] The lingual auxiliary force device is connected to the lingual auxiliary retention structure by welding or plugging; when plugging, a plurality of protrusions are arranged on the inner sides of both ends, and grooves matching the protrusions are arranged at corresponding positions of the lingual auxiliary retention structure, and the two are fixed after plugging.

[0016] The lingual auxiliary force-adding device at the position of the central incisor and the lateral incisor is arranged on the lingual side; the lingual auxiliary force-adding device at the position of the molar also includes part or all of the crown side. Furthermore, in order to avoid the thickness of the lingual auxiliary force-adding device causing difficulty in closing the upper and lower teeth, a hole is arranged on the lingual auxiliary force-adding device corresponding to the high position of the crown.

[0017] A composite braces-type orthodontic appliance with multiple mechanical properties comprises a plurality of continuous or discontinuous composite braces-type orthodontic appliance units with multiple mechanical properties.

[0018] The preparation method of the composite braces-type orthodontic appliance comprises the following steps:

[0019] (1) Obtain a three-dimensional digital model of the patient's dentition and tooth morphology;

[0020] (2) Segment each tooth to make it a removable independent digital model;

[0021] (3) Design a correction plan to arrange the teeth to the target position;

[0022] (4) Printing a model of tooth movement for each step of the appliance unit;

[0023] (5) Analyze the tooth movement form and force characteristics, and design corresponding auxiliary force devices;

[0024] (6) Processing auxiliary force-adding devices made of nickel-titanium or stainless steel alloy, combining them with the target model, and installing auxiliary retention devices on this basis;

[0025] (7) The outer braces are made by thermoplastic molding or 3D printing.

[0026] In step (5), the auxiliary force-applying device is arranged on the lingual side of the teeth, the occlusal surface of the posterior teeth and / or the buccal side to avoid its presence in large quantities on the labial side of the anterior teeth and affecting the aesthetics.

[0027] The present invention has the following technical effects:

[0028] (1) The most important features of transparent braces are unchanged: no brackets, transparent (especially on the labial side of the front teeth), and comfortable;

[0029] (2) Improve its mechanical characteristics and combine the advantages of alloy materials with transparent braces;

[0030] (3) The braces themselves can be made of a softer, more fitted material, and can mainly serve as a fixed alloy force-adding device.

[0031] (4) It can significantly reduce the number of times patients go to the hospital to adjust their braces during the process of transparent braces correction; that is, the braces can be used longer at each stage, and can be adjusted once a month or so. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of a typical case of the prior art;

[0033] Figure 2 It is a schematic diagram of a typical case 2 of the prior art;

[0034] Figure 3 It is a structural schematic diagram of the present invention (decomposed state);

[0035] Figure 4 It is a structural schematic diagram of the present invention (installation state);

[0036] In the figure: 10, lingual auxiliary retention structure; 11, groove; 20, lingual auxiliary force device; 21, protrusion; 22, hole.

[0037] Figure 5 This is a schematic diagram of a typical case 1 of an embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of a typical case 2 of an embodiment of the present invention;

[0039] Figure 7 Schematic diagram of typical case three of an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The technical features of the present invention are further described below in conjunction with the accompanying drawings and specific embodiments.

[0041] Typical case of prior art 1: Figure 1 As shown, the hazards are: 1. At the position indicated by the hollow arrow, extra pressure is generated between the tooth root and the alveolar bone, leading to bone absorption and root absorption; 2. In the direction indicated by the solid arrow, the teeth are tilted inward than the ideal state, which not only affects the appearance, but also interferes with the movement of the mandible and causes joint disease.

[0042] Reasons: 1. In the initial state, due to the missing or extraction of tooth No. 4, the braces in this position are narrowed, and there is no internal support, so the strength is weak. The braces undergo undesirable deformation at this position, changing the direction of the force. 2. Taking tooth No. 1 as an example, when subjected to force, the edge rises, resulting in a poor force position. The force and resistance of the adduction are not in the same plane, resulting in a rotational trend, causing the braces to deform. The edge rises, and the point of action moves further downward.

[0043] Typical case 2 of prior art: Figure 2 As shown in the figure, the movement to the dotted line position requires a long-lasting vertical force, and the force of the braces needs a fulcrum to provide support. When the fulcrum is close, the support force is small due to the short force arm; when the fulcrum is far away, due to the decay of the braces material, it cannot provide long-term soft and stable orthodontic force.

[0044] Depend on Figure 1 and Figure 2 It can be seen that the rigidity and elasticity of bracketless invisible braces bring corresponding problems to their application.

[0045] like Figure 3 and Figure 4 A composite braces-type orthodontic appliance unit with multiple mechanical properties is shown, comprising: a lingual auxiliary retention structure designed and manufactured through computer aided design, the lingual auxiliary retention structure is sleeved on the outside of the orthodontic tooth; a group of lingual auxiliary force devices designed and manufactured through computer aided design, the lingual auxiliary force devices are arranged on the inner side of the lingual auxiliary retention structure; the lingual auxiliary force device is bonded together with at least a part of the lingual auxiliary retention structure; the lingual auxiliary force device has a plurality of continuous or discontinuous units.

[0046] The dental braces-type orthodontic appliance unit has several groups, counted as: unit 1, unit 2, ..., and each unit is designed by computer aid, forming a series of continuous orthodontic devices.

[0047] At least a portion of the inner contour of the lingual auxiliary retention structure matches the outer contour of the lingual auxiliary force-applying device.

[0048] The tongue side auxiliary force adding device is made of alloy material.

[0049] The lingual auxiliary force device is connected to the lingual auxiliary retention structure by welding or plugging; when plugging, a plurality of protrusions are arranged on the inner sides of both ends, and grooves matching the protrusions are arranged at corresponding positions of the lingual auxiliary retention structure, and the two are fixed after plugging.

[0050] The lingual auxiliary force-adding device at the position of the central incisor and the lateral incisor is arranged on the lingual side; the lingual auxiliary force-adding device at the position of the molar also includes part or all of the crown side. Furthermore, in order to avoid the thickness of the lingual auxiliary force-adding device causing difficulty in closing the upper and lower teeth, a hole is arranged on the lingual auxiliary force-adding device corresponding to the high position of the crown.

[0051] The preparation method of the above-mentioned composite braces-type orthodontic appliance has the following steps: obtaining a three-dimensional STL model of the patient's dentition and tooth morphology; segmenting each tooth to make it a movable independent STL model; designing a correction plan to arrange the dentition to the target position; printing a model of tooth movement of each step of the orthodontic appliance unit; analyzing the tooth movement form and force characteristics, and designing a corresponding auxiliary force device; processing the auxiliary force device of nickel-titanium or stainless steel alloy material, combining it with the target model, and installing the auxiliary retention device on this basis; and making the outer braces by thermoplastic molding or 3D printing. The auxiliary force device is arranged on the lingual side of the teeth, the occlusal surface of the posterior teeth, and / or the buccal side to prevent it from appearing in large quantities on the labial side of the anterior teeth and affecting the aesthetics.

[0052] like Figure 5 As shown, combining different types of alloys and braces in fixed orthodontics can largely take into account the advantages of both, thereby improving treatment outcomes, increasing safety and reducing complications.

[0053] like Figure 6 As shown, alloy material support is added to the lingual side of the braces, covering the lingual 2 / 3 area of ​​the occlusal surface of the posterior teeth, and the tooth cusps are hollowed out to reduce the foreign body sensation during biting.

[0054] like Figure 7 As shown in the figure, when individual teeth are seriously misaligned, additional support is added to the lingual side of the braces and the buccal side of the posterior teeth to prevent excessive deformation of the weak parts. At the same time, traction hooks are welded to facilitate traction of the misaligned teeth.

[0055] Through the technical solution of the present invention, teeth correction is performed, and the mechanical properties of bracketless invisible braces are improved through the composite application of multiple materials: according to the different stages of correction and the movement of teeth, auxiliary force devices of different materials and structures are designed, so as to get closer to the purpose of continuous and gentle orthodontic force, increase the correction efficiency of bracketless invisible braces, improve safety, and reduce complications. In addition, during use, due to the support of the lingual auxiliary force device, the overall composite braces-type braces have less decay, and can provide a relatively long-term gentle and stable orthodontic force. Patients undergoing correction can go to the hospital for adjustment once every 1-2 months, which greatly reduces the time cost.

[0056] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A composite braces-type appliance unit having multiple mechanical properties, characterized in that: include: A lingual auxiliary retention structure designed and manufactured by computer aided design, wherein the lingual auxiliary retention structure is sleeved on the outside of the orthodontic tooth; A set of lingual auxiliary force-adding devices designed and manufactured by computer aided design, wherein the lingual auxiliary force-adding devices are arranged on the inner side of the lingual auxiliary retention structure; the lingual auxiliary force-adding devices are attached to at least a part of the lingual auxiliary retention structure; The lingual auxiliary force-adding device has a plurality of continuous or discontinuous units; the lingual auxiliary force-adding device covers the lingual 2 / 3 area of ​​the occlusal surface of the posterior teeth.

2. A composite braces-type appliance unit with multiple mechanical properties according to claim 1, characterized in that: The dental braces-type orthodontic appliance unit has several groups, counted as: unit 1, unit 2, ..., and each unit is designed by computer aid, forming a series of continuous orthodontic devices.

3. A composite braces-type appliance unit with multiple mechanical properties according to claim 1, characterized in that: At least a portion of the inner contour of the lingual auxiliary retention structure matches the outer contour of the lingual auxiliary force-applying device.

4. A composite braces-type appliance unit with multiple mechanical properties according to claim 1, characterized in that: The tongue side auxiliary force adding device is made of alloy material.

5. A composite braces-type appliance unit with multiple mechanical properties according to claim 1, characterized in that: The lingual auxiliary force device is connected to the lingual auxiliary retention structure by welding or plugging; when plugging, a plurality of protrusions are arranged on the inner sides of both ends, and grooves matching the protrusions are arranged at corresponding positions of the lingual auxiliary retention structure, and the two are fixed after plugging.

6. A composite braces-type appliance unit with multiple mechanical properties according to claim 1, characterized in that: The lingual auxiliary force device at the central incisor and lateral incisor positions is arranged on the lingual side; the lingual auxiliary force device at the molar position also includes part of the crown side; in order to avoid the thickness of the lingual auxiliary force device causing difficulty in closing the upper and lower teeth, a hole is arranged on the lingual auxiliary force device corresponding to the high position of the crown.

7. A composite brace-type appliance with multiple mechanical properties, characterized in that: A composite braces-type orthodontic appliance unit with multiple mechanical properties comprising any one of several claims 1-6.

8. The method for preparing the composite braces-type orthodontic appliance with multiple mechanical properties according to claim 7, characterized in that: The steps are as follows: (1) Obtain a three-dimensional digital model of the patient's dentition and tooth morphology; (2) Segment each tooth to make it a removable independent digital model; (3) Design a correction plan to arrange the teeth to the target position; (4) Printing models of tooth movement for each step of the appliance unit; (5) Analyze the tooth movement form and force characteristics, and design the corresponding lingual auxiliary force device; (6) Process an auxiliary force-adding device made of nickel-titanium or stainless steel alloy material, combine it with the target model, and install the lingual auxiliary retention device on this basis.

9. The method for preparing a composite braces-type orthodontic appliance with multiple mechanical properties according to claim 8, characterized in that: In step (5), the lingual auxiliary force-applying device is arranged on the lingual side of the teeth, the occlusal surface of the posterior teeth and / or the buccal side to avoid its presence in large quantities on the labial side of the anterior teeth and affecting the aesthetics.

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