Transparent retainer without jaw pad effect and manufacturing method thereof

Abstract

The invention discloses a transparent retainer without jaw pad effect, which comprises an upper jaw retainer and a lower jaw retainer, both the upper jaw retainer and the lower jaw retainer are transparent, the upper jaw retainer comprises a cavity A attached to the tongue side surface and the buccal side surface of an upper tooth, and the lower jaw retainer comprises a cavity B attached to the tongue side surface and the buccal side surface of a lower tooth; the upper jaw retainer further comprises an upper jaw retainer occlusal surface cavity, the lower jaw retainer further comprises a lower jaw retainer occlusal surface cavity, the upper jaw retainer occlusal surface cavity penetrates through the bottom of the cavity A, and the lower jaw retainer occlusal surface cavity penetrates through the top of the cavity B; the occlusal surface cavity of the upper jaw retainer and the occlusal surface cavity of the lower jaw retainer avoid the contact part when the upper teeth and the lower teeth are occluded, so that the occlusion condition when the upper teeth and the lower teeth are occluded is the same as the occlusion condition when the transparent retainer is not worn. Interference of an upper dentition and a lower dentition on an occlusal surface can be avoided, so that the upper dentition and the lower dentition can be in direct contact, no early contact point is caused, and the occlusal surface cannot be raised.

Description

Technical Field

[0001] The invention relates to a dental treatment appliance, in particular to a transparent retainer without jaw pad effect and a manufacturing method thereof. Background Art

[0002] Orthodontic retainers are an important medical device used after orthodontic treatment is completed. Their main function is to help fix and stabilize the corrected teeth. When the teeth are adjusted to the ideal position through orthodontic treatment, the surrounding periodontal tissues and muscles need a certain amount of time to adapt to the new position. During this period, if there is no retainer to fix the teeth, the teeth will easily return to their original position.

[0003] There are two main types of retainers:

[0004] One is the Halley retainer, which is composed of a resin base and a metal wire in the front teeth area. The resin base covers the maxillary palate, and the metal wire is close to the labial surface of the front teeth, which can effectively maintain the position of the maxillary teeth. This retainer is simple to make, comfortable to wear, and easy to clean, but the disadvantage is that it is easy to lose or damage, and the fixing effect on the posterior teeth area is relatively weak.

[0005] The other is a full-mouth transparent retainer made of thermoplastic material, which is made by taking a mold of the patient's teeth and using vacuum forming technology. This retainer has good aesthetics, and it is almost invisible when it is worn. It is easy to clean and can fully cover all teeth. However, doctors do not recommend patients to use transparent compression molded appliances for a long time. One of the main reasons is that the occlusal surface of the retainer also has a certain thickness, which will cause the upper and lower teeth to not form an ideal occlusion, the occlusal surface will increase, and early contact points will appear, which may cause the posterior teeth to be depressed, the orthodontic effect cannot be maintained, and even cause tooth trauma and damage to the temporomandibular joint. Summary of the invention

[0006] In order to overcome the above-mentioned defects, the present invention aims to provide a transparent retainer without jaw pad effect, which can avoid interference between the upper and lower teeth on the occlusal surface, allowing the upper and lower teeth to contact directly without causing any premature contact points or raising the occlusal surface, thereby eliminating the possibility of tooth trauma and temporomandibular joint damage that may be caused by traditional transparent retainers.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0008] A transparent retainer without a jaw pad effect, comprising an upper jaw retainer and a lower jaw retainer, wherein both the upper jaw retainer and the lower jaw retainer are transparent, characterized in that the upper jaw retainer comprises a cavity A which fits both the lingual and buccal surfaces of the upper teeth, and the lower jaw retainer comprises a cavity B which fits both the lingual and buccal surfaces of the lower teeth;

[0009] The maxillary retainer also includes a maxillary retainer occlusal surface cavity, and the mandibular retainer also includes a mandibular retainer occlusal surface cavity. The maxillary retainer occlusal surface cavity passes through the bottom of cavity A, and the mandibular retainer occlusal surface cavity passes through the top of cavity B. The maxillary retainer occlusal surface cavity and the mandibular retainer occlusal surface cavity avoid the contact part when the upper teeth and the lower teeth are occluded, so that the occlusal condition of the upper teeth and the lower teeth when occluding is the same as when not wearing a transparent retainer.

[0010] Preferably, the arrangement of the occlusal surface cavities of the maxillary retainer and the mandibular retainer is based on the result of Boolean operation, and the cavities are mainly distributed on the occlusal surfaces of the upper and lower molars and the lingual area of ​​the upper anterior teeth, avoiding the occlusal area.

[0011] Further preferably, the number of cavities A may be the same as the number of teeth in the maxillary complete dentition and correspond one to one, the number of cavities B may be the same as the number of teeth in the mandibular complete dentition and correspond one to one, the maxillary retainer covers the lingual and buccal sides of the maxillary complete dentition, and the mandibular retainer covers the lingual and buccal sides of the mandibular complete dentition.

[0012] Furthermore, the transparent retainer without jaw pad effect includes an additional local reinforcement structure and / or functional structure;

[0013] Preferably, the local reinforcement structure includes: the thickness of the maxillary retainer and the mandibular retainer corresponding to the front and rear teeth and not affecting the occlusal contact is increased and / or reinforcement ribs are provided.

[0014] Preferably, the functional structure comprises a tongue spike and / or a tongue rail and / or a palatal bead.

[0015] The present invention also discloses a method for manufacturing the transparent retainer without jaw pad effect, including a method for determining the position of the occlusal cavity, wherein the method for determining the position of the occlusal cavity comprises the following steps:

[0016] S1. Acquisition of digital model: obtaining the digital model of the patient's oral cavity based on the oral scan data after the patient's orthodontic treatment;

[0017] S2, generating an initial retainer model: expanding the thickness of the crown surface of the patient's oral digital model outward to form an initial retainer model, wherein the initial retainer model includes an initial maxillary retainer model and an initial mandibular retainer model;

[0018] S3, Boolean operation of maxillary and mandibular retainers: Boolean operation is performed on the initial maxillary retainer model and the mandibular dentition, and the intersection of the initial maxillary retainer model and the mandibular dentition is removed to form a maxillary retainer occlusal cavity, and the cavity edge is smoothed to obtain a maxillary retainer model;

[0019] The initial mandibular retainer complete model and the maxillary retainer were subjected to Boolean operation, and the intersection of the initial mandibular retainer model and the maxillary retainer was removed to form a cavity on the occlusal surface of the mandibular retainer. The edge of the cavity was smoothed to obtain the mandibular retainer model.

[0020] Preferably, in step S3, the size of the occlusal surface cavity needs to be at least consistent with the Boolean operation result, or redundant occlusal surface areas are removed based on the Boolean operation result.

[0021] As a manufacturing method, this transparent retainer without jaw pad effect is produced by rapid prototyping through a direct 3D printing method.

[0022] Preferably, the 3D printing uses the same resin material, or uses resin materials with different elastic moduli according to the anatomical position of the oral cavity.

[0023] As another manufacturing method, the transparent retainer without jaw pad effect is manufactured by vacuum hot pressing followed by precision cutting or grinding, comprising the following steps:

[0024] Step 1: Vacuum hot pressing mold to manufacture the appliance: 3D print the upper and lower jaw dentition models after orthodontic treatment, and form a full-coverage membrane on the surface of the upper and lower jaw dentition models through a vacuum hot pressing mold;

[0025] Step 2: Obtain the cavity edge cutting line of the transparent appliance: on the upper and lower jaw retainer models, determine the processed gingival margin line and cavity edge line;

[0026] Step 3: Process the occlusal cavity using the subtractive method: Process along the gingival margin line and the cavity edge line through precision cutting or grinding to form a retainer with a cavity.

[0027] The beneficial effects of the present invention are as follows:

[0028] 1. The transparent retainer without jaw pad effect disclosed in the present invention eliminates the interference of the upper and lower teeth on the occlusal surface, allowing the upper and lower teeth to contact directly without causing any early contact points or raising the occlusal surface, thereby eliminating the possibility of tooth trauma and temporomandibular joint damage that may be caused by traditional transparent retainers.

[0029] 2. The posterior tooth area of ​​existing transparent braces is often worn, damaged or even cracked due to the patient's bite force. The transparent retainer without jaw pad effect disclosed in the present invention is not subjected to force on the occlusal surface, which eliminates the failure of the retainer due to the bite force and can effectively improve the durability of the retainer. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of the transparent retainer without jaw pad effect disclosed in the invention.

[0031] Figure 2 The present invention is a schematic structural diagram of a mandibular retainer of a transparent retainer without a jaw pad effect disclosed in the present invention.

[0032] Figure 3 This is a schematic diagram of the upper jaw retainer and the lower jaw retainer of the transparent retainer without jaw pad effect disclosed in the invention when they are matched.

[0033] Figure 4 for Figure 3 Right view of .

[0034] Figure 5 This is a schematic diagram of the structure of Example 6. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0036] Example 1

[0037] This embodiment discloses a transparent holder, specifically Figure 1 , Figure 2 As shown, it includes a maxillary retainer 1 and a mandibular retainer 2, both of which are transparent, the maxillary retainer 1 includes a cavity A11 that fits both the lingual and buccal surfaces of the upper teeth, and the mandibular retainer 2 includes a cavity B211 that fits both the lingual and buccal surfaces of the lower teeth;

[0038] The maxillary retainer 1 also includes a maxillary retainer occlusal surface cavity 12, and the mandibular retainer 2 also includes a mandibular retainer occlusal surface cavity 22. The maxillary retainer occlusal surface cavity 12 passes through the bottom of cavity A11, and the mandibular retainer occlusal surface cavity 22 passes through the top of cavity B2. The maxillary retainer occlusal surface cavity 12 and the mandibular retainer occlusal surface cavity 22 avoid the contact part when the upper teeth and the lower teeth are occluded, so that the occlusal condition of the upper teeth and the lower teeth when occluding is the same as when not wearing a transparent retainer.

[0039] Wherein: the arrangement of the maxillary retainer occlusal surface cavity 12 and the mandibular retainer occlusal surface cavity 22 conforms to the result of Boolean operation.

[0040] like Figure 3 , Figure 4 As shown, in this embodiment, the number of cavities A11 is the same as the number of teeth in the maxillary complete dentition and corresponds one to one, the number of cavities B21 is the same as the number of teeth in the mandibular complete dentition and corresponds one to one, the maxillary retainer 1 covers the lingual and buccal sides of the maxillary complete dentition, and the mandibular retainer 2 covers the lingual and buccal sides of the mandibular complete dentition.

[0041] In this embodiment, the design of the occlusal cavity 12 of the maxillary retainer and the occlusal cavity 22 of the mandibular retainer is based on Boolean operations to ensure that the remaining parts of the upper and lower retainers except for the occlusal contact area of ​​the upper and lower teeth are still retained and can wrap the teeth, thereby achieving the maximum retention of the function of fixing the tooth position while removing the interference with the occlusal contact of the upper and lower teeth;

[0042] When the maxillary retainer 1 and the mandibular retainer 2 are worn on the upper and lower dentition respectively, due to the existence of the occlusal surface cavities of the maxillary retainer and the mandibular retainer, the upper and lower teeth can achieve normal occlusal contact like the Halley retainer, without producing a cushioning effect like the traditional film retainer, thereby preventing the depression of the posterior teeth caused by the use of transparent retainers and eliminating the possibility of tooth trauma and damage to the temporomandibular joint.

[0043] Example 2

[0044] This embodiment discloses a method for determining the position of the occlusal cavity of the transparent retainer without jaw pad effect disclosed in the present invention, which specifically includes the following steps:

[0045] S1. Obtaining the digital model of the patient: Obtain the digital model of the patient's oral scan after the orthodontic treatment. The doctor will determine whether it is necessary to adjust the teeth appropriately at the current tooth position to achieve the ideal retention state;

[0046] S2. Generation of an initial retainer model: expanding the crown surface area of ​​the patient's intraoral digital model outward by a certain thickness to generate an initial retainer three-dimensional model;

[0047] S3. Boolean operation of maxillary and mandibular retainers: perform Boolean operation on the initial maxillary retainer model and the mandibular dentition, remove the intersecting part of the initial maxillary retainer model and the mandibular dentition, form a cavity on the occlusal surface of the maxillary retainer, smooth the edge of the cavity, and obtain the maxillary retainer model; perform Boolean operation on the initial complete mandibular retainer model and the maxillary retainer, remove the intersecting part of the initial mandibular retainer model and the maxillary retainer, form a cavity on the occlusal surface of the mandibular retainer, smooth the edge of the cavity, and obtain the complete mandibular retainer model.

[0048] Example 3

[0049] On the basis of Example 2, the size of the occlusal surface cavity in step S3 needs to be at least consistent with the Boolean operation result, and redundant occlusal surface areas may be removed based on the Boolean operation result.

[0050] Example 4

[0051] Based on Example 1, 2 or 3, the transparent holder is produced by using a direct 3D printing method using resin material.

[0052] Example 5

[0053] On the basis of Example 4, this example uses materials of different hardness in different areas of the transparent retainer for printing, for example, high-strength photosensitive resin is used in the crown covering area, and flexible photosensitive resin is used in the gingival transition area.

[0054] Example 6

[0055] like Figure 5 As shown, based on Example 1, 2 or 3, this embodiment adds a tongue guard 3 design to the maxillary retainer 1 or the mandibular retainer to prevent the tongue from protruding forward, guide the tongue position, and correct the patient's bad tongue habits.

[0056] Example 7

[0057] On the basis of Example 1, 2 or 3, this embodiment increases the thickness and / or sets reinforcing ribs at the weak parts of the maxillary retainer and the mandibular retainer corresponding to the front and rear teeth that do not affect the occlusal contact, so as to enhance the retention effect.

[0058] Example 8

[0059] On the basis of Embodiment 1, 2 or 3, the processing of the transparent holder can also be carried out by a method of precision processing after hot pressing, including the following steps:

[0060] S1. Vacuum hot pressing mold to manufacture the appliance: Additive manufacturing 3D prints the upper and lower jaw dentition models after orthodontic treatment, and forms a full coverage membrane on the surface of the dentition model through a vacuum hot pressing mold;

[0061] S2. Obtain the cavity edge cutting line of the transparent appliance: determine the processed gingival margin line and cavity edge line on the upper and lower jaw retainer models;

[0062] S3. Subtractive method for processing occlusal cavity: Through precision cutting or grinding, processing along the gingival margin line and the cavity edge line to form a retainer with a cavity.

[0063] Example 9

[0064] Based on Example 1, 2 or 3, in addition to the manufacturing method described in this patent, additive manufacturing methods such as injection molding and other subtractive molding methods can be used to produce the transparent retainer.

[0065] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A transparent retainer without jaw pad effect, comprising an upper jaw retainer and a lower jaw retainer, wherein both the upper jaw retainer and the lower jaw retainer are transparent, characterized in that: The maxillary retainer includes a cavity A that fits both the lingual and buccal surfaces of the upper teeth, and the mandibular retainer includes a cavity B that fits both the lingual and buccal surfaces of the lower teeth; The maxillary retainer also includes a maxillary retainer occlusal surface cavity, and the mandibular retainer also includes a mandibular retainer occlusal surface cavity. The maxillary retainer occlusal surface cavity passes through the bottom of cavity A, and the mandibular retainer occlusal surface cavity passes through the top of cavity B. The maxillary retainer occlusal surface cavity and the mandibular retainer occlusal surface cavity avoid the contact part when the upper teeth and the lower teeth are occluded, so that the occlusal condition of the upper teeth and the lower teeth when occluding is the same as when not wearing a transparent retainer.

2. The transparent retainer without jaw pad effect according to claim 1, characterized in that: The arrangement of the occlusal surface cavity of the maxillary retainer and the occlusal surface cavity of the mandibular retainer is based on the result of Boolean operation. The cavities are mainly distributed on the occlusal surfaces of the upper and lower molars and the lingual area of ​​the upper front teeth, avoiding the occlusal area.

3. The transparent retainer without jaw pad effect according to claim 2, characterized in that: The number of the cavities A can be the same as the number of teeth in the complete maxillary dentition and correspond one to one, the number of the cavities B can be the same as the number of teeth in the complete mandibular dentition and correspond one to one, the maxillary retainer covers the lingual and buccal sides of the complete maxillary dentition, and the mandibular retainer covers the lingual and buccal sides of the complete mandibular dentition.

4. The transparent retainer without jaw pad effect according to claim 3, characterized in that: Including additional local reinforcement structures and / or functional structures.

5. The transparent retainer without jaw pad effect according to claim 4, characterized in that: The local reinforcement structure includes: the thickness of the upper jaw retainer and the lower jaw retainer corresponding to the front and rear teeth that do not affect the occlusal contact is increased and / or reinforced ribs are set.

6. The transparent retainer without jaw pad effect according to claim 4, characterized in that: The functional structure comprises a tongue spike and / or a tongue rail and / or a palatal bead.

7. A method for manufacturing a transparent retainer without jaw pad effect as claimed in claim 2 or 3, characterized in that: The invention comprises a method for determining the position of the occlusal cavity, wherein the method for determining the position of the occlusal cavity comprises the following steps: S1. Acquisition of digital model: obtaining the digital model of the patient's oral cavity based on the oral scan data after the patient's orthodontic treatment; S2, generating an initial retainer model: expanding the thickness of the crown surface of the patient's oral digital model outward to form an initial retainer model, wherein the initial retainer model includes an initial maxillary retainer model and an initial mandibular retainer model; S3, Boolean operation of maxillary and mandibular retainers: Boolean operation is performed on the initial maxillary retainer model and the mandibular dentition, and the intersection of the initial maxillary retainer model and the mandibular dentition is removed to form a maxillary retainer occlusal cavity, and the cavity edge is smoothed to obtain a maxillary retainer model; The initial mandibular retainer complete model and the maxillary retainer were subjected to Boolean operation, and the intersection of the initial mandibular retainer model and the maxillary retainer was removed to form a cavity on the occlusal surface of the mandibular retainer. The edge of the cavity was smoothed to obtain the mandibular retainer model.

8. The method according to claim 7, characterized in that: In step S3, the size of the occlusal surface cavity must at least be consistent with the Boolean operation result, or redundant occlusal surface areas are removed based on the Boolean operation result.

9. The manufacturing method according to claim 7, characterized in that: Rapid prototyping production via direct 3D printing methods.

10. The manufacturing method according to claim 9, characterized in that: The 3D printing uses the same resin material, or uses resin materials with different elastic moduli according to the anatomical position of the oral cavity.

11. The manufacturing method according to claim 7, characterized in that: The method of vacuum hot pressing followed by precision cutting or grinding is used for manufacturing, and the method comprises the following steps: Step 1: Vacuum hot pressing mold to manufacture the appliance: 3D print the upper and lower jaw dentition models after orthodontic treatment, and form a full-coverage membrane on the surface of the upper and lower jaw dentition models through a vacuum hot pressing mold; Step 2: Obtain the cavity edge cutting line of the transparent appliance: on the upper and lower jaw retainer models, determine the processed gingival margin line and cavity edge line; Step 3: Process the occlusal cavity using the subtractive method: Process along the gingival margin line and the cavity edge line through precision cutting or grinding to form a retainer with a cavity.

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