A device for overall lowering and retraction of the upper dentition

Abstract

This utility model discloses a device for overall indentation and retraction of the upper dentition. It comprises a support frame, archwire, fixation components, and anchorage screws. The connecting portion of the support frame can be installed on the patient's palate, and the fixation portions at both ends of the connecting portion are connected to the patient's posterior teeth. Some of the fixation components are located in the fixation portions, while others are installed on the patient's tooth surfaces. In its natural state, the archwire, which is warped at the ends and middle, is constrained by the fixation components. The anchorage screws are positioned corresponding to the fixation portions and are connected to the fixation section located between the ends and middle of the archwire via a first elastic element. The support frame, which is subjected to tongue pressure, the elastically deformable archwire, and the first elastic element together provide indentation force to the patient's maxillary teeth, thereby achieving an overall indentation effect on the patient's upper dentition. This allows for the correction of gummy smiles without the need for a large number of anchorage screws.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a device for overall depressing and retracting the upper dental arch. Background Technology

[0002] Gummy smiles are characterized by excessive exposure of the maxillary anterior gingiva (usually greater than 2mm) when smiling, often accompanied by overall maxillary tooth protrusion, which particularly disrupts the aesthetic harmony of the face when smiling or laughing. For these patients, orthodontic camouflage treatment is an important approach. This method often involves implanting multiple micro-implants on the labial side of the anterior teeth and the buccal and palatal sides of the bilateral posterior teeth to provide anchorage and indent the entire maxillary dentition. However, although micro-implants are relatively minimally invasive, there are still risks of root damage and irritation of the oral mucosa. In treatment plans involving multiple implants, if they fall out during treatment, it not only increases treatment costs but also affects the overall treatment system, significantly reducing the effectiveness of the treatment. Utility Model Content

[0003] This invention provides a device for overall depressing and retracting the upper dental arch, which improves upon the problem of using a large number of anchorage screws in related technologies and can reduce the number of anchorage screws used.

[0004] To achieve the above objectives, this utility model provides a device for overall depressing and retracting the upper dental arch, comprising:

[0005] The bracket includes a connecting part and a fixing part. There are two fixing parts, which are connected to the two ends of the connecting part. The connecting part is arched along a direction perpendicular to the line connecting the two fixing parts.

[0006] The bowwire includes a fixed section located between the middle and two ends of the bowwire. The fixed section is connected to the two fixed parts on opposite sides. In its natural state, the ends and middle of the bowwire are warped along the arching direction of the connecting part.

[0007] The fixing member is a plurality of fixing members, which are spaced apart corresponding to the extension direction of the archwire. Parts of the fixing members are connected to the opposite side of two fixing parts and connected to the fixing section. The fixing member is used to fix the archwire and the tooth relative to each other.

[0008] An anchorage screw is provided at intervals from the fixed portion along the arched direction of the connecting portion, and the anchorage screw is connected to the fixed portion through a first elastic element. In use, the device of this invention for overall intrusion and retraction of the upper dentition requires the fixed portion to be fixed to the patient's maxillary second premolar, first molar, and second molar, with the connecting portion located at the patient's palate. The arched portion of the connecting portion faces the palatal roof and is 5-8 mm away from it. The pressure of the tongue during swallowing allows the support to provide an intrusive force towards the gingiva. The distance between the connecting portion and the palatal roof prevents the connecting portion from embedding into the palatal roof during the intrusion of the upper dentition. The portions of the fixation members not connected to the fixation section are mounted on the surfaces of other teeth of the patient, ensuring all fixation members are on the same plane. The middle portion of the archwire corresponds to the patient's anterior teeth, and the end portion corresponds to the patient's molars. After the archwire is connected to the fixation member, the naturally warped portions of the end and middle of the archwire are constrained by the fixation member, generating a depressor force on the anterior and molar regions of the dentition due to elasticity, and an elongation force in the fixation section. The anchorage screw is connected to the fixation section through the first elastic member, thereby generating a depressor force on the dentition through the fixation section, while simultaneously eliminating the effect of the elongation force generated by the archwire in the fixation section. Furthermore, since the point of application of the indentation force exerted by the archwire on the patient's anterior teeth is located on the labial side of the center of resistance, it generates a labial torque on the anterior teeth, promoting labial inclination and preventing lingual inclination during orthodontic treatment. The point of application of the indentation force exerted by the archwire on the molars is located on the buccal side of the center of resistance, thus generating a buccal torque on the molars, causing a tendency for buccal inclination. At this time, the support structure placed on the patient's palate can counteract this buccal torque and stabilize the dental arch width. In summary, the device of this invention for overall indentation and retraction of the upper dentition can achieve the effect of overall indentation of the patient's upper dentition, allowing for orthodontic treatment of patients with gummy smiles without the need for a large number of anchorage screws.

[0009] As an optional technical solution, a traction hook is also included. One end of the traction hook is connected to the archwire, with the connection point located between the middle of the archwire and the fixed section. The other end of the traction hook extends in an arched direction toward the connection point and is connected to the anchorage screw via a second elastic element. By pulling the traction hook with the second elastic element, an inward force can be applied to the patient's anterior teeth region, causing the anterior teeth to retract.

[0010] As an optional technical solution, the length of the traction hook is 7-10mm. Compared to configuring the traction hook with a shorter size, the traction hook in this technical solution allows the force exerted by the second elastic element on the traction hook to be closer to the resistance center of the patient's anterior teeth. This helps to reduce the gingival component of the retraction force exerted by the second elastic element on the patient's anterior teeth, thereby reducing the lingual torque on the anterior teeth to prevent lingual tilting of the anterior teeth during retraction, and facilitating controlled overall retraction of the anterior teeth.

[0011] As an optional technical solution, the end of the traction hook is provided with a sleeve, and the bowwire passes through the sleeve. The sleeve helps to improve the stability of the connection between the traction hook and the bowwire, thereby better transmitting the force of the second elastic element to the bowwire.

[0012] As an optional technical solution, the second elastic element is a tension spring.

[0013] As an optional technical solution, the fixing part includes a plurality of fixing bands connected sequentially corresponding to the extension direction of the archwire. The fixing bands are used to be sleeved on the crown of the molar so that the bracket is relatively fixed to the molar.

[0014] As an optional technical solution, the fixing band is provided with multiple occlusal rests corresponding to the crown of the molar. The occlusal rests are used to apply a force along the gingival direction to the molar. The occlusal rests can prevent the fixing band from shifting relative to the molar and sinking into the gingiva during the process of the framework applying a depressive force to the patient's molar, and at the same time, can better transmit the depressive force of the framework to the patient's molar.

[0015] As an optional technical solution, some of the multiple fasteners are welded to the fixing part.

[0016] As an optional technical solution, the thickness of the connecting part along the arching direction is 1.5-3mm, and the width of the connecting part is 5-8mm.

[0017] As an optional technical solution, the first elastic element is a rubber chain.

[0018] One or more technical solutions provided by this utility model have at least the following technical effects or advantages:

[0019] This utility model discloses a device for overall indentation and retraction of the upper dentition. It comprises a support frame, archwire, fixation components, and anchorage screws. The connecting portion of the support frame can be installed on the patient's palate, and the fixation portions at both ends of the connecting portion are connected to the patient's posterior teeth. Some of the fixation components are located in the fixation portions, while others are installed on the patient's tooth surfaces. In its natural state, the archwire, which is warped at the ends and middle, is constrained by the fixation components. The anchorage screws are positioned corresponding to the fixation portions and are connected to the fixation section located between the ends and middle of the archwire via a first elastic element. The support frame, which is subjected to tongue pressure, the elastically deformable archwire, and the first elastic element together provide indentation force to the patient's maxillary teeth, thereby achieving an overall indentation effect on the patient's upper dentition. This allows for the correction of gummy smiles without the need for a large number of anchorage screws. Attached Figure Description

[0020] The accompanying drawings, which are provided to further illustrate the embodiments of the present invention and constitute a part of the present invention, do not constitute a limitation thereof.

[0021] Figure 1 This is a schematic diagram of the maxilla from the front view when the device for overall depressing and retracting the upper dentition is installed in the patient's mouth.

[0022] Figure 2 for Figure 1 A schematic diagram of the maxillary lateral view when the device for overall intrusion and retraction of the upper dentition is installed in the patient's mouth;

[0023] Figure 3 for Figure 1 A schematic diagram of the maxillary occlusal profile when the device for overall intrusion and retraction of the upper dentition is installed in the patient's mouth;

[0024] Figure 4 for Figure 1 A schematic diagram of the palate when the device for overall intrusion and retraction of the upper dentition is installed in the patient's mouth;

[0025] Figure 5 for Figure 1 A schematic diagram of the force analysis of the maxillary lateral view when the device for overall intrusion and retraction of the upper dentition is installed in the patient's mouth;

[0026] Figure 6 for Figure 1 A schematic diagram of the force analysis from the front view when the device used to depress and retract the upper teeth is installed in the patient's mouth.

[0027] in:

[0028] Bracket-1; Connector-11; Fixation-12; Fixation band ring-12a; Occlusal rest-12b;

[0029] Archwire-2; Fixed section-21;

[0030] Fixing component-3; bracing nail-4; first elastic component-5; second elastic component-6; traction hook-7. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] In this invention, the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0033] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0034] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a direct connection, an indirect connection via an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0035] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0036] Gummy smile refers to an excessive exposure of the maxillary anterior gingiva (usually greater than 2 mm) when smiling, often accompanied by overall protrusion of the maxillary teeth, particularly disrupting the aesthetic harmony of the face when smiling or laughing. Furthermore, some patients with gummy smiles exhibit an "open lip and exposed teeth" appearance when their lip muscles are relaxed, requiring them to forcibly close their mouths to completely cover their teeth, increasing their psychological burden. Its pathogenesis is complex, related to the jawbone, facial soft tissue structure, gingival tissue, and clinical crown length. Jawbone developmental abnormalities account for a significant proportion, and two or more factors may be at play. For example, excessive vertical development of the maxilla can cause the upper dentition to elongate relative to the upper lip; if accompanied by sagittal hyperdevelopment, this may worsen the gummy smile and open lip / exposed teeth appearance. An excessively short upper lip or excessively short clinical crown length of the upper anterior teeth can also cause a gummy smile.

[0037] Among existing treatments, botulinum toxin injections in the upper lip can temporarily alleviate a short upper lip, and partial gingival resection of the upper anterior teeth to lengthen the clinical crown can alleviate mild gummy smiles. However, these two methods are often ineffective when addressing gummy smiles caused by skeletal factors. Furthermore, excessive vertical development of the maxilla is often accompanied by mandibular retrusion and skeletal Class II malocclusion. Treatment options for these patients focus on two main approaches: orthodontic-orthognathic combined treatment and orthodontic camouflage treatment. The former often carries multiple risks and is unacceptable to some patients; the latter often requires the placement of multiple micro-implant anchorage screws on the labial side of the anterior teeth and the buccal and palatal sides of the bilateral posterior teeth to provide anchorage and depress the overall maxillary dentition. However, although micro-implant anchorage screws are relatively minimally invasive, they still carry risks of damaging tooth roots and irritating oral mucosa. In treatment plans requiring multiple implants, if they fall out during treatment, it not only increases treatment costs but also affects the overall treatment system, significantly reducing the treatment effect. Therefore, new devices and methods are needed to address the clinical needs of orthodontic camouflage treatment for gummy smiles. These devices should reduce the number of micro-implant anchorage screws while utilizing various devices to improve the force system, thereby efficiently indenting and retracting the upper dentition as a whole.

[0038] Based on this, the present invention provides a device for overall depressing and retracting the upper teeth, which can reduce the amount of anchorage screws used.

[0039] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0040] Example 1

[0041] like Figures 1-6 As shown, where Figure 1 , Figure 2The gray dashed line represents the state of the archwire 2 after it is fixed by the fixing member 3, and the black dashed line represents the state of the traction hook 7 after the archwire 2 is fixed by the fixing member 3 and the second elastic member 6 is connected to the end of the traction hook 7. This embodiment provides a device for overall depressing and retracting of the upper dental arch, including a bracket 1, an archwire 2, a fixing member 3, and an anchoring screw 4. The bracket 1 includes a connecting part 11 and a fixing part 12. There are two fixing parts 12, which are connected to the two ends of the connecting part 11. The connecting part 11 is arched in a direction perpendicular to the line connecting the two fixing parts 12. The archwire 2 includes a fixing section 21, which is located between the middle and the two ends of the archwire 2. The fixing section 21 is connected to the side opposite to the two fixing parts 12. In its natural state, the ends and the middle of the archwire 2 are warped along the arching direction of the connecting part 11. There are multiple fasteners 3, which are spaced apart corresponding to the extension direction of the archwire 2. Some of the fasteners 3 are connected to the opposite sides of the two fixing parts 12 and are connected to the fixing section 21. The fasteners 3 are used to fix the archwire 2 to the teeth. The anchoring screws 4 are spaced apart from the fixing parts 12 along the arching direction of the connecting part 11. The anchoring screws 4 are connected to the fixing section 21 through the first elastic member 5.

[0042] The natural state is the state in which the bowwire 2 is not subject to any constraints.

[0043] Preferably, the bow wire 2 is 0.018 inches × 0.025 inches or 0.019 inches × 0.025 inches stainless steel square wire.

[0044] It should be noted that when installing archwire 2, the lowest point of archwire 2 in the lateral view should be at the level of the second premolar and the first molar. It is recommended that the archwire bend beyond the gingival margin at the incisor and be about 5-10 mm away from the incisor groove. This distance can be gradually reduced as the extraction space is closed.

[0045] In addition, the recommended implantation site for anchorage screw 4 is on the buccal side between the maxillary second premolar and the maxillary first molar, at a vertical height of approximately the junction of the apical 1 / 3 and the middle 1 / 3 of the root.

[0046] For example, the fastener 3 can be a buccal tube, bracket or other fastener that can restrict the relative movement of the archwire 2 and the teeth. In practice, different types of fasteners 3 can also be used in combination.

[0047] In this embodiment, the device for overall indentation and retraction of the upper dentition requires the fixing part 12 to be fixed to the patient's second premolar, first molar, and second molar in the maxilla, with the connecting part 11 positioned at the patient's palate. The arched part of the connecting part 11 faces the palatal roof and is 5-8 mm away from it. The pressure of the patient's tongue during swallowing allows the bracket 1 to provide an indentation force towards the gum line. The distance between the connecting part 11 and the palatal roof prevents the connecting part 11 from embedding into the palatal roof during the indentation of the upper dentition. The portions of the multiple fixing members 3 not connected to the fixing part 12 are installed on the surfaces of the patient's other teeth, ensuring that all fixing members 3 are on the same plane. The middle part of the archwire 2 corresponds to the patient's anterior teeth, and the end part corresponds to the patient's molars. After the archwire 2 is connected to the fixing members 3, the naturally warped portions of the end and middle parts of the archwire 2 will be constrained by the fixing members 3. Due to elasticity, indentation forces F1 and F3 are generated in the anterior and molar regions of the dentition, respectively, and an elongation force F2 is generated in the fixing section 21. The anchorage screw 4 is connected to the fixed section 21 via the first elastic element 5, thereby generating an indentation force F5 on the dentition through the fixed section 21, while simultaneously eliminating the effect of the elongation force F2 generated by the archwire 2 in the fixed section 21. Furthermore, since the point of application of the indentation force generated by the archwire 2 on the patient's anterior teeth is located on the labial side of the center of resistance, it generates a labial torque M1 on the anterior teeth, promoting labial inclination and preventing lingual inclination during treatment. The point of application of the indentation force F3 generated by the archwire 2 on the molars is located on the buccal side of the center of resistance, thus generating a buccal torque M5 on the molars, causing a buccal inclination tendency. Additionally, the point of application of the indentation force F5 generated by the first elastic element 5 on the dentition is also located on the buccal side of the center of resistance, similarly causing a buccal inclination tendency. The combined effect of F3 and F5 generates a buccal inclination torque M on the molars. At this time, the bracket 1 placed on the patient's palate can generate a torque M' to counteract this buccal inclination torque M and stabilize the arch width. In summary, the device of this invention for overall intrusion and retraction of the upper dentition can achieve the effect of overall intrusion of the patient's upper dentition, and can be used to treat patients with gummy smiles without the need for a large number of anchorage screws.

[0048] As an optional implementation, the device for overall indentation and retraction of the upper dentition also includes a traction hook 7. One end of the traction hook 7 is connected to the archwire 2, with the connection point located between the middle of the archwire 2 and the fixed section 21. The other end of the traction hook 7 extends toward the arching direction of the connection portion 11 and is connected to the anchorage screw 4 via a second elastic member 6. By pulling the traction hook 7 with the second elastic member 6, an inward retraction force F4 can be applied to the patient's anterior teeth region, causing the anterior teeth to retract.

[0049] Example 2

[0050] Based on Embodiment 1, the length of the traction hook 7 is 7-10mm. Compared to configuring the traction hook 7 with a shorter size, the traction hook 7 in this embodiment allows the force exerted by the second elastic member 6 on the traction hook 7 to be closer to the center of resistance of the patient's anterior teeth. This helps to reduce the component of the retraction force F4 exerted by the second elastic member 6 on the patient's anterior teeth in the gingival direction, thereby reducing the lingual torque M4 on the anterior teeth to prevent lingual tilting of the anterior teeth during retraction, which is beneficial for achieving controlled overall retraction of the anterior teeth.

[0051] As an optional implementation, the end of the traction hook 7 is provided with a sleeve, through which the bowwire 2 passes. The sleeve helps to improve the stability of the connection between the traction hook 7 and the bowwire 2, thereby better transmitting the force of the second elastic element 6 to the bowwire 2.

[0052] As an optional implementation, the fixing part 12 includes a plurality of fixing bands 12a connected in sequence in the direction of extension of the archwire 2. The fixing bands 12a are used to be sleeved on the crown of the molar so that the bracket 1 is fixed relative to the molar.

[0053] As an optional implementation, the fixing band has multiple occlusal rests 12b corresponding to the crown of the molar. The occlusal rests 12b are used to apply a force along the gingival direction to the molar. The occlusal rests 12b can prevent the fixing band 12a from relative displacement and sinking into the gingiva during the process of the framework 1 applying a depressing force to the patient's molar, and at the same time, can better transmit the depressing force of the framework 1 to the patient's molar.

[0054] As an optional implementation, some of the multiple fasteners 3 are welded to the fixing part 12.

[0055] As an optional implementation, the thickness of the connecting part 11 along the arching direction is 1.5-3mm, and the width of the connecting part 11 is 5-8mm.

[0056] As an optional implementation, the first elastic element 5 is a rubber chain.

[0057] As an optional implementation, the second elastic element 6 is a tension spring.

[0058] In some embodiments, the first elastic element 5 may be configured as a tension spring, the second elastic element 6 as a rubber chain, or elastic wire may be used as the first elastic element 5 or the second elastic element 6.

[0059] Example 3

[0060] This embodiment provides a method of using a device for overall depressing and retracting the upper dental arch, applied to the device for overall depressing and retracting the upper dental arch provided in Embodiment 1, including the following steps:

[0061] S1: Take an intraoral model of the patient, then design the bracket 1 according to the shape of the patient's palate and teeth, and install the corresponding tooth fixation component 3;

[0062] S2: Using adhesive, install stent 1 into the patient's mouth;

[0063] S3: Implantation of anchorage nail 4;

[0064] S4: Compare the patient's oral cavity condition and adjust the archwire 2 warp amplitude accordingly;

[0065] S5: Compare the patient's oral cavity condition and clamp the traction hook 7;

[0066] S6: Install the first elastic element 5 and the second elastic element 6;

[0067] S7: End installation, and adjust archwire 2, first elastic element 5, second elastic element 6, etc. according to the patient's maxillary dentition retraction and occlusion during follow-up visits.

[0068] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0069] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A device for overall lowering and retraction of the upper dentition, characterized in that, include: The bracket includes a connecting part and a fixing part. There are two fixing parts, which are connected to the two ends of the connecting part. The connecting part is arched along a direction perpendicular to the line connecting the two fixing parts. The bowwire includes a fixed section located between the middle and two ends of the bowwire. The fixed section is connected to the two fixed parts on opposite sides. In its natural state, the ends and middle of the bowwire are warped along the arching direction of the connecting part. The fixing members are multiple, and the multiple fixing members are spaced apart and connected to the archwire in the direction of archwire extension. Parts of the multiple fixing members are connected to the opposite side of two fixing parts and connected to the fixing section. The fixing members are used to fix the archwire and the teeth relative to each other. The anchoring pin is provided at intervals from the fixed part along the arching direction of the connecting part, and the anchoring pin is connected to the fixed section through a first elastic member.

2. The device for overall depressing and retracting the upper dental arch according to claim 1, characterized in that, It also includes a traction hook, one end of which is connected to the bowwire, and the connection is located between the middle of the bowwire and the fixed section. The other end of the traction hook extends toward the arched direction of the connection and is connected to the anchor nail through a second elastic member.

3. The device for overall depressing and retracting the upper dental arch according to claim 2, characterized in that, The length of the traction hook is 7-10mm.

4. The device for overall depressing and retracting the upper dental arch according to claim 2, characterized in that, The end of the traction hook is provided with a sleeve, and the bow wire passes through the sleeve.

5. The device for overall depressing and retracting the upper dental arch according to claim 2, characterized in that, The second elastic element is a tension spring.

6. The device for overall depressing and retracting the upper dental arch according to claim 1, characterized in that, The fixing part includes a plurality of fixing bands connected in sequence corresponding to the extension direction of the archwire. The fixing bands are used to be sleeved on the crown of the molar so that the bracket is fixed relative to the molar.

7. The device for overall depressing and retracting the upper dental arch according to claim 6, characterized in that, The fixing band is provided with multiple occlusal rests corresponding to the crown of the molar, and the occlusal rests are used to apply a force along the gingival direction to the molar.

8. The device for overall depressing and retracting of the upper dental arch according to claim 1, characterized in that, A portion of the plurality of fasteners is welded to the fastening portion.

9. The device for overall depressing and retracting the upper dental arch according to claim 1, characterized in that, The thickness of the connecting part along the arching direction is 1.5-3mm, and the width of the connecting part is 5-8mm.

10. The device for overall depressing and retracting the upper dental arch according to claim 1, characterized in that, The first elastic element is a rubber chain.

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