Micro-implant-assisted digitalized mandibular molar anterior displacement device

Abstract

A micro-implant-assisted digitalized mandibular molar anterior displacement device, comprising an implant screw (1) and a traction bracket. The traction bracket comprises a cap portion (2), a left connecting rod (3), a right connecting rod (4), a left traction hook (5), a left adhesive wing (6), a right traction hook (7) and a right adhesive wing (8), wherein the left adhesive wing (6) is connected to the left connecting rod (3), an end of the left traction hook (5) is connected to the left adhesive wing (6), the right adhesive wing (8) is connected to the right connecting rod (4), and an end of the right traction hook (7) is connected to the right adhesive wing (8). Alternatively, the traction bracket comprises a cap portion (2), a left connecting rod (3), a right connecting rod (4), a left traction hook (5), a right traction hook (7) and clamping tubes (10), wherein one clamping tube is connected to an end of each of the left connecting rod (3) and the right connecting rod (4); alternatively, the cap portion (2) is connected to a clamping tube (10) by means of a vertical rod (11). The micro-implant-assisted digitalized mandibular molar anterior displacement device can simultaneously anteriorly displace bilateral mandibular molars without increasing the occlusal height or causing mandibular clockwise rotation, and only requires the implantation of one implant screw (1), and the implant screw (1) is used to support and limit the traction bracket, such that the traction bracket does not put pressure on the gums, thereby reducing trauma to a patient.

Description

Micro-implant-assisted digital mandibular molar advancement device Technical Field

[0001] The present invention relates to the technical field of dental orthodontic appliances, and in particular to a mandibular molar advancement device. Background Art

[0002] Angle Class II malocclusion It is a common mistake Deformity requires correction of the distal relationship of the molars to achieve a neutral relationship. In the treatment of Class II molars, correction of Class II molar relationship is still a difficult problem: for example, patients with skeletal Class II with crowding of anterior teeth or lip tilt compensation often need to extract the upper and lower first premolars to relieve crowding or remove compensation, and the subsequent correction of molar relationship is more complicated; for example, patients with skeletal Class II, open Patients with temporomandibular joint disorders may experience joint discomfort during intermaxillary traction. Currently, commonly used methods for improving Class II molar relationship include intermaxillary Class II elastic traction and the Forsus appliance. However, literature reports that Class II intermaxillary traction can cause clockwise rotation of the occlusal plane, exacerbating mandibular retrusion and hindering Class II facial correction. Furthermore, the effectiveness of this method depends on patient compliance. Furthermore, the Forsus appliance can cause intrusion of the maxillary first molar and adversely affect the soft tissues in the mouth. Therefore, it can be seen that the currently used methods for correcting molar distal relationship each have their limitations.

[0003] To correct the distal relationship of the molars, the bilateral mandibular molars can be moved mesially to achieve a good neutral relationship of the molars. If the mandibular molars are to be moved mesially, the anterior teeth support needs to be strengthened. If the anterior teeth are used as dental support to move the mandibular molars forward, the anterior teeth may be retracted and the mesial movement of the molars may be poor. Therefore, we need to seek more stable support to reduce the impact on the anterior teeth. Currently, micro screws have become a recognized and reliable method for providing temporary support. Compared with traditional support methods, micro screws are easier to place and remove, smaller and more cost-effective. Many scholars have used micro implants as a stable support substitute for the mesial displacement of molars. Therefore, we can consider using implant support to move the mandibular molars forward to correct Class II relationship.

[0004] Currently, common methods for correcting Class II molar alignment using implants include placing two implants in the posterior mandible or between the mandibular lateral incisor and canine to facilitate mesial molar movement. However, Wu JC et al. believe that mesial molar movement using two implants placed bilaterally in the posterior mandible may result in occlusal rotation and prolonged treatment time. If implants are placed bilaterally between the mandibular lateral incisors and canines, due to the anatomical characteristics of the mandible, elastic traction during mesial molar movement can compress the mucosal soft tissue, causing mucosal damage and inflammation. Therefore, a more ideal implant placement is needed to strengthen anterior anchorage. Some literature suggests that miniature implants in the anterior mandible can be used clinically for intrusion, intermaxillary fixation, and molar advancement of mandibular incisors. Zhang Shizhen et al. measured total bone thickness (OBT) and cortical bone thickness (CBT) in the mandibular symphysis region using CBCT in 32 adolescent and adult patients. The results showed that the CBT and OBT were most effective between the two mandibular central incisors, and the alveolar bone quality on the labial side of the mandibular incisor root was sufficient to accommodate the micro-implant without the risk of root damage. The recommended optimal implant location is 6–10 mm apical to the CEJ between the two mandibular central incisors. Therefore, the space between the lower anterior teeth is an ideal implant placement site. However, if the molars are directly retracted using elastic implants in the anterior region, the gums will be compressed. Therefore, the rational use of implant anchorage is a question that needs to be considered. Therefore, we hope to design a device more rationally that can use implant anchorage in the mandibular anterior region to mesialize the bilateral mandibular molars and correct the distal relationship of the molars. Technical issues

[0005] The purpose of the present invention is to provide a micro-implant-assisted digital mandibular molar advancement device to solve the technical problem of using implant support in the mandibular anterior region to move bilateral mandibular molars mesially and correct the distal relationship of the molars. Technical Solutions

[0006] The micro-implant-assisted digital mandibular molar advancement device of the present invention comprises an implant pin and a traction bracket for implanting in the front of the mandible;

[0007] The traction bracket includes a cap portion for covering the head of the implant nail, a left connecting rod and a right connecting rod connected to the cap portion, a left traction hook, a left adhesive wing for being attached to the left mandibular canine, a right traction hook, and a right adhesive wing for being attached to the right mandibular canine; the left adhesive wing is connected to the left connecting rod, and the end of the left traction hook is connected to the left adhesive wing or the left connecting rod; the right adhesive wing is connected to the right connecting rod, and the end of the right traction hook is connected to the right adhesive wing or the right connecting rod;

[0008] Alternatively, the traction bracket includes a cap portion for covering the head of the implant nail, a left connecting rod and a right connecting rod connected to the cap portion, a left traction hook connected to the left connecting rod, a right traction hook connected to the right connecting rod, and a clamping tube for clamping the arch wire; the ends of the left connecting rod and the right connecting rod are respectively connected to a clamping tube, or the cap portion and the clamping tube are connected by a vertical rod.

[0009] Furthermore, the left adhesive wing is connected to the end of the left connecting rod, and the end of the left traction hook is connected to the left adhesive wing; the right adhesive wing is connected to the end of the right connecting rod, and the end of the right traction hook is connected to the right adhesive wing.

[0010] Furthermore, the left adhesive wing and the right adhesive wing are respectively connected to an archwire bracket.

[0011] Furthermore, the left traction hook and the right traction hook each have two arc-shaped openings for connecting rubber bands. Beneficial effects

[0012] 1. The micro-implant-assisted digital mandibular molar advancement device of the present invention does not increase the occlusal height and does not cause the mandibular to rotate forward.

[0013] 2. The micro-implant-assisted digital mandibular molar advancement device of the present invention only requires the implantation of one implant screw, and the implant screw is used to provide support and limit the traction bracket. The traction bracket does not exert pressure on the gums, thereby reducing trauma to the patient.

[0014] 3. The micro-implant-assisted digital mandibular molar advancement device of the present invention can simultaneously advance bilateral mandibular molars, correct bilateral molar Class II relationship, and shorten the treatment time.

[0015] 4. The micro-implant-assisted digital mandibular molar advancement device of the present invention does not hinder or interfere with the advancement of the molars, and provides sufficient support force.

[0016] 5. The micro-implant-assisted digital mandibular molar advancement device of the present invention has little effect on canine relationship, anterior tooth overbite and overjet.

[0017] 6. Compared with the existing intermaxillary Class II distraction device, the micro-implant-assisted digital mandibular molar advancement device of the present invention has lower patient compliance requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic structural diagram of the micro-implant-assisted digital mandibular molar advancement device described in Example 1;

[0019] FIG2 is a schematic diagram of the micro-implant-assisted digital mandibular molar advancement device in FIG1 from another perspective;

[0020] FIG3 is a schematic diagram of the three-dimensional structure of the traction bracket;

[0021] FIG4 is a schematic diagram of a traction bracket welded with an archwire bracket;

[0022] FIG5 is an example of a micro-implant-assisted digital mandibular molar advancement device pulling the left molar;

[0023] FIG6 is an example diagram of a micro-implant-assisted digital mandibular molar advancement device disposed on the anterior portion of the mandible;

[0024] FIG7 is an example of a micro-implant-assisted digital mandibular molar advancement device pulling the right molar;

[0025] FIG8 is a schematic diagram of a traction hook on a traction bracket having two arc-shaped openings;

[0026] FIG9 is an example diagram of the improved traction bracket in FIG8 being arranged on the front of the mandible;

[0027] FIG10 is a schematic structural diagram of the micro-implant-assisted digital mandibular molar advancement device described in Example 2;

[0028] FIG11 is another structural schematic diagram of the micro-implant-assisted digital mandibular molar advancement device described in Example 2. Best Mode for Carrying Out the Invention

[0029] The present invention will be further described below with reference to the accompanying drawings and examples.

[0030] Embodiment 1, as shown in FIG1 to FIG3 , the micro-implant-assisted digital mandibular molar advancement device of this embodiment includes an implant pin 1 for implanting in the front of the mandible and a traction bracket.

[0031] The traction bracket includes a cap portion 2 for covering the head of the implant pin, a left connecting rod 3 and a right connecting rod 4 connected to the cap portion, a left traction hook 5, a left adhesive wing 6 for attaching to the left mandibular canine, a right traction hook 7, and a right adhesive wing 8 for attaching to the right mandibular canine. The left adhesive wing is connected to the left connecting rod, and the end of the left traction hook is connected to the left adhesive wing; the right adhesive wing is connected to the right connecting rod, and the end of the right traction hook is connected to the right adhesive wing. Of course, in different embodiments, the end of the left traction hook can also be connected to the left connecting rod, and the end of the right traction hook can be connected to the right connecting rod.

[0032] As an improvement to the above embodiment, as shown in Figure 4, the left and right adhesive wings are each connected to an archwire bracket 9. In practice, the archwire brackets are secured to the left and right adhesive wings by welding. The connection between the archwire brackets and the archwire allows the mandibular molars to be moved forward along the archwire, further improving the corrective effect of molar positioning.

[0033] As shown in Figures 5 to 7 of the specification, when the micro-implant-assisted digital mandibular molar advancement device in this embodiment is used to pull the mandibular molars forward, the implant pin 1 is implanted in the middle of the front part of the mandible, the cap portion 2 of the traction bracket is covered on the head of the implant pin, the left adhesive wing and the right adhesive wing are respectively attached to the canines on the left and right sides of the mandible, one end of the rubber band providing traction force is hung on the left traction hook, and the other end is hung on the buccal tube attached to the left mandibular molar, and then one end of another rubber band providing traction force is hung on the right traction hook, and the other end is hung on the buccal tube attached to the right mandibular molar, thereby providing forward traction force for the molars on the left and right sides of the mandible.

[0034] The micro-implant-assisted digital mandibular molar advancement device in this embodiment does not increase occlusal height or cause mandibular rotation. It requires only one implant, which provides support and position control for the traction bracket. The traction bracket does not compress the gums, reducing trauma to the patient.

[0035] As an improvement to the above embodiment, as shown in Figure 8 , the left and right traction hooks each have two arcuate openings for connecting rubber bands. This improvement allows the rubber band providing the traction force to be connected to different arcuate openings, thereby adjusting the traction force. An embodiment of this improved structure is shown in Figure 9 .

[0036] Embodiment 2. The micro-implant-assisted digital mandibular molar advancement device of this embodiment includes an implant pin 1 for implanting in the front of the mandible and a traction bracket. The traction bracket includes a cap portion 2 for covering the head of the implant pin, a left connecting rod 3 and a right connecting rod 4 connected to the cap portion, a left traction hook 5 connected to the left connecting rod, a right traction hook 6 connected to the right connecting rod, and a clamping tube 10 for clamping on the arch wire. In this embodiment, as shown in FIG10 , the ends of the left connecting rod and the right connecting rod are respectively connected to a clamping tube. Of course, in different embodiments, as shown in FIG11 , the cap portion and the clamping tube can also be connected by a vertical rod 11. In this embodiment, the micro-implant-assisted digital mandibular molar advancement device adopts a clamping tube 10 to be connected to the arch wire, and the traction bracket is not connected to the mandibular canines through adhesive wings, so that the influence on the mandibular canines during the traction process of the mandibular molar advancement is smaller.

[0037] As an improvement to the above embodiment, the left traction hook and the right traction hook each have two arc-shaped openings for connecting rubber bands. This improvement allows the rubber band providing traction force to be connected to different arc-shaped openings, thereby adjusting the magnitude of the traction force.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A micro-implant-assisted digital mandibular molar advancement device, characterized in that: It includes an implant pin and a distraction bracket for implanting in the front part of the mandible; The traction bracket includes a cap portion for covering the head of the implant nail, a left connecting rod and a right connecting rod connected to the cap portion, a left traction hook, a left pasting wing for pasting on the left mandibular canine, a right traction hook and a right pasting wing for pasting on the right mandibular canine; the left pasting wing is connected to the left connecting rod, and the end of the left traction hook is connected to the left pasting wing or the left connecting rod; the right pasting wing is connected to the right connecting rod, and the end of the right traction hook is connected to the right pasting wing or the right connecting rod; Alternatively, the traction bracket includes a cap portion for covering the head of the implant nail, a left connecting rod and a right connecting rod connected to the cap portion, a left traction hook connected to the left connecting rod, a right traction hook connected to the right connecting rod, and a clamping tube for clamping the arch wire; the ends of the left connecting rod and the right connecting rod are respectively connected to a clamping tube, or the cap portion and the clamping tube are connected by a vertical rod.

2. The micro-implant-assisted digital mandibular molar advancement device according to claim 1, characterized in that: The left adhesive wing is connected to the end of the left connecting rod, and the end of the left traction hook is connected to the left adhesive wing; the right adhesive wing is connected to the end of the right connecting rod, and the end of the right traction hook is connected to the right adhesive wing.

3. The micro-implant-assisted digital mandibular molar advancement device according to claim 1, characterized in that: The left adhesive wing and the right adhesive wing are respectively connected with an archwire bracket.

4. The micro-implant-assisted digital mandibular molar advancement device according to claim 1, characterized in that: The left traction hook and the right traction hook are both provided with two arc-shaped openings for connecting rubber bands.

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