Mandibular push molar distalization device suitable for bone class III malocclusion

Abstract

The utility model provides a mandibular push molar distalization device suitable for bony class III malocclusion, which comprises a tail end guide rail, a front end guide rail, a push rod and a sleeve type push spring, the tail end guide rail is fixed on the last tooth needing to be moved, the front end guide rail is fixed on canine teeth or first premolar teeth at the turning position of a dentition dental arch, and the push rod is fixed on the sleeve type push spring. A push rod is arranged between the tail end guide rail and the front end guide rail in a penetrating mode, a traction hook is arranged at the end, penetrating through the front end guide rail, of the push rod, a tail end blocking ball is arranged at the other end, penetrating through the tail end guide rail, of the push rod, a sleeve type push spring is movably connected between the tail end guide rail and the front end guide rail in a sleeved mode, and a free buckle for blocking and limiting the sleeve type push spring is arranged on the push rod. The traction hook is connected with a jaw anchorage component such as an anchorage nail through a rubber band. The mandibular molars can be pushed to the distal direction, the mandibular molars can be pushed to the distal direction, meanwhile, the mandibular molars can assist in promoting the development of the maxilla and inhibiting the development of the mandible for other clinical bony III-type malocclusion orthotic devices, the structure is scientific and reasonable, the mandibular molars are simple and practical, the mechanical analysis is simple and clear, the use comfort of a patient is high, and the orthotic effect is good.

Description

Technical Field

[0001] This utility model belongs to the field of oral orthodontic medical technology, specifically relating to a mandibular molar distalization device suitable for skeletal Class III malocclusion. Background Technology

[0002] Distal molar retraction is one of the orthodontic treatment methods for mild to moderate crowding to create space and adjust molar relationships. Among the existing orthodontic appliances with relatively mature clinical translation, maxillary molar retraction appliances are more mature and diverse in style, but there are fewer related appliances for mandibular molar retraction, and there are currently no commercially available mandibular molar distalization devices that are widely used.

[0003] Class III skeletal malocclusion is often accompanied by maxillary hypoplasia. Simultaneously, excessive mesial movement of the mandibular molars frequently leads to mesial molar relationships and mandibular crowding. Currently, various orthodontic appliances are used in clinical practice to promote maxillary development, and their effectiveness has been proven. However, simultaneously pushing the mandibular molars distally requires a more complex appliance design, resulting in a poor patient experience. Furthermore, the appliances are independent of each other, making biomechanical analysis complex and preventing them from functioning as a unified orthodontic biomechanics unit to simultaneously push the mandibular molars distally. Therefore, a mandibular molar distalization appliance suitable for Class III skeletal malocclusion needs to be designed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a mandibular molar distalization device suitable for skeletal Class III malocclusion, which addresses the shortcomings of the prior art. This device can push the mandibular molars distally, assist in promoting maxillary bone development and inhibiting mandibular bone development. It has a scientific and reasonable structure, is simple and practical, has a simple and clear mechanical analysis, provides high patient comfort, and has good orthodontic effect.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a mandibular molar distalization device suitable for skeletal Class III malocclusion, characterized in that it includes an end guide rail, a front guide rail, a push rod, and a sleeve-type push spring. The end guide rail is fixed on the last tooth to be moved, and the front guide rail is fixed on the canine or the first premolar at the junction of the dental arch. A push rod passes between the end guide rail and the front guide rail. A traction hook is provided at one end of the push rod that passes through the front guide rail, and an end blocking ball is provided at the other end of the push rod that passes through the end guide rail. A sleeve-type push spring is movably sleeved on the push rod between the end guide rail and the front guide rail. A free buckle for blocking and limiting the sleeve-type push spring is provided on the push rod. The traction hook is connected to the opposing anchorage component, such as an anchorage screw, through a rubber band.

[0006] Preferably, the end guide rail is a hollow cylindrical tube, the inner diameter of the end guide rail is slidably matched with the cross-sectional diameter of the push rod, and the end guide rail is fixedly connected to the fixing seat on the last tooth that needs to be moved by laser welding.

[0007] Preferably, the front guide rail is provided with a holding groove for the push rod to pass through, and a cover is arranged on the front guide rail to open and close the holding groove.

[0008] Preferably, the diameter of the push rod is 1 mm, and the diameter of the end blocking ball is greater than the inner diameter of the end guide rail, so that the end blocking ball can prevent the push rod from coming out of the end guide rail and protect the oral mucosa of the patient.

[0009] Preferably, the sleeve type push spring comprises an outer sleeve and an inner sleeve, the outer sleeve is slidably nested on the outside of the inner sleeve, the push spring is connected between the inner sleeve and the outer sleeve, one end of the inner sleeve extends out of the outer sleeve, and the end of the outer sleeve away from the inner sleeve is in contact with the end guide rail for pressing, and the end of the inner sleeve away from the outer sleeve is in contact with the free buckle for pressing.

[0010] Preferably, the free buckle is provided with a pressing spring buckle for clamping the push rod, and the pressing spring buckle is closed and locked to be fixedly connected to the push rod, so as to block and compress the sleeve type push spring, and the pressing spring buckle can also be opened to adjust the relative position of the free buckle on the push rod according to actual conditions.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1. The utility model discloses simple and reasonable structure design, practicality is strong, and installation is simple, and the maxillary bone development is promoted and the mandibular development is also inhibited, and the mandibular molar is pushed to the distal, and the correction effect is good, and the cost is low, and can be widely used.

[0013] 2. The utility model discloses that the sleeve type push spring of hollow is set on the push rod, and the structure is simple and reasonable, and installation is simple.

[0014] 3. The free buckle in the utility model is not easy to deform, can be used repeatedly for many times, can also be flexibly adjusted position, and practicality is strong.

[0015] The utility model will be further explained in detail in combination with the drawings and examples. DRAWINGS

[0016] Figure 1 It is the structure schematic view of the utility model installation in the oral cavity of patient.

[0017] Figure 2 It is the side view structure schematic view of the front guide rail in the utility model.

[0018] MARKING OF DRAWINGS:

[0019] 1—End guide rail; 2—Front guide rail; 3—Traction hook;

[0020] 4—Sleeve-type push spring; 5—Free-moving latch; 6—Free-moving latch;

[0021] 7—Free-floating clip; 8—Elastic band; 9—Slot;

[0022] 10 — Open and close the lid. Detailed Implementation

[0023] like Figure 1 and Figure 2 As shown, this utility model includes an end guide rail 1, a front guide rail 2, a push rod 6, and a sleeve-type push spring 4. The end guide rail 1 is fixed on the last mandibular tooth that needs to be moved, and the front guide rail 2 is fixed on the canine at the turning point of the mandibular dental arch. The push rod 6 passes between the end guide rail 1 and the front guide rail 2. A traction hook 3 is provided at one end of the push rod 6 that passes through the front guide rail 2, and an end blocking ball 7 is provided at the other end of the push rod 6 that passes through the end guide rail 1. The sleeve-type push spring 4 is movably sleeved on the push rod 6 between the end guide rail 1 and the front guide rail 2. The push rod 6 is provided with a free buckle 5 for blocking and limiting the sleeve-type push spring 4. The traction hook 3 is connected to the anchoring nail through a rubber band 8.

[0024] In this embodiment, the end guide rail 1 is a hollow cylindrical tube, the inner diameter of the end guide rail 1 is slidably matched with the cross-sectional diameter of the push rod 6, and the end guide rail 1 is fixedly connected to the fixing seat on the last tooth that needs to be moved by laser welding.

[0025] In this embodiment, the front guide rail 2 is provided with a groove 9 for the push rod 6 to pass through, and the front guide rail 2 is slidably provided with an opening and closing cover 10 for opening and closing the groove 9.

[0026] In this embodiment, the diameter of the push rod 6 is 1mm, and the diameter of the end blocking ball 7 is larger than the inner diameter of the end guide rail 1. The end blocking ball 7 can prevent the push rod 6 from falling out of the end guide rail 1, and at the same time protect the patient's oral mucosa and prevent the push rod 6 from piercing the patient's mouth.

[0027] In this embodiment, the sleeve-type push spring 4 includes an outer sleeve and an inner sleeve. The outer sleeve is slidably nested outside the inner sleeve, and a push spring connects the inner sleeve and the outer sleeve. One end of the inner sleeve extends out of the outer sleeve, and the end of the outer sleeve away from the inner sleeve contacts and presses against the end guide rail 1. The end of the inner sleeve away from the outer sleeve contacts and presses against the free buckle 5. The traction force on the push rod 6 is increased by the traction hook 3 and the rubber band 8, thereby compressing the sleeve-type push spring 4.

[0028] In this embodiment, the free buckle 5 is provided with a press-type spring buckle for locking the push rod 6. When closed, the press-type spring buckle is fixedly engaged with the push rod 6, which serves to block and compress the sleeve-type push spring 4. At the same time, the press-type spring buckle can be opened to adjust the relative position of the free buckle 5 on the push rod 6 according to the actual situation.

[0029] This utility model is based on Figure 1 After being installed in the patient's mouth as shown, tightening the elastic band 8 generates traction force through the traction push rod 6. The horizontal component of this traction force provides an anterior force to promote growth in the maxilla, a posterior force to move the mandibular molars, and simultaneously exerts a posterior force to inhibit growth in the mandible. During the tightening of the elastic band 8, the sleeve-type push spring 4 is compressed and shortened, generating thrust in both the anterior and posterior directions. The posterior thrust pushes the molars backward, while the anterior thrust is counteracted by the elastic band tension.

[0030] The above description is merely a preferred embodiment of this utility model and does not constitute any limitation on this utility model. Any simple modifications, alterations, and equivalent changes made to the above embodiments based on the technical essence of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A mandibular molar distalization device suitable for skeletal Class III malocclusion, characterized in that, The device includes an end guide rail (1), a front guide rail (2), a push rod (6), and a sleeve-type push spring (4). The end guide rail (1) is fixed on the last tooth that needs to be moved. The front guide rail (2) is fixed on the canine or the first premolar at the junction of the dental arch. The push rod (6) passes between the end guide rail (1) and the front guide rail (2). A traction hook (3) is provided at one end of the push rod (6) that passes through the front guide rail (2). An end blocking ball (7) is provided at the other end of the push rod (6) that passes through the end guide rail (1). The sleeve-type push spring (4) is movably sleeved between the end guide rail (1) and the front guide rail (2) on the push rod (6). The push rod (6) is provided with a free buckle (5) for blocking and limiting the sleeve-type push spring (4). The traction hook (3) is connected to the opposing anchorage component through a rubber band (8).

2. The mandibular molar distalization device for skeletal Class III malocclusion according to claim 1, characterized in that, The end guide rail (1) is a hollow cylindrical tube. The inner diameter of the end guide rail (1) is slidably matched with the cross-sectional diameter of the push rod (6). The end guide rail (1) is fixedly connected to the fixed seat on the last tooth that needs to be moved by laser welding.

3. The mandibular molar distalization device for skeletal Class III malocclusion according to claim 1, characterized in that, The front guide rail (2) is provided with a slot (9) for the push rod (6) to pass through, and the front guide rail (2) is provided with an opening and closing cover (10) for opening and closing the slot (9).

4. The mandibular molar distalization device for skeletal Class III malocclusion according to claim 1, characterized in that, The diameter of the push rod (6) is 1 mm, and the diameter of the end blocking ball (7) is greater than the inner diameter of the end guide rail (1).

5. The mandibular molar distalization device according to claim 1, characterized in that, The sleeve-type push spring (4) includes an outer sleeve and an inner sleeve. The outer sleeve is slidably nested on the outside of the inner sleeve. A push spring is connected between the inner sleeve and the outer sleeve. One end of the inner sleeve extends out of the outer sleeve. The end of the outer sleeve away from the inner sleeve contacts the end guide rail (1). The end of the inner sleeve away from the outer sleeve contacts the free buckle (5).

6. The mandibular molar distalization device for skeletal Class III malocclusion according to claim 1, characterized in that, The free buckle is provided with a press-type spring buckle for locking the push rod (6).

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