Lower jaw retraction corrector stable in locking

Abstract

The utility model relates to a mandibular retraction corrector stable in locking, and belongs to the field of medical instruments. Comprising a retainer and a metal wing, the retainer and the metal wing are crossed and propped against each other, an upper band ring is fixedly connected to the back of the retainer, the upper band ring is used for being fixed on an upper jaw abutment, the metal wing is connected to a movable arm, the movable arm and a fixed arm are movably connected through a screw rod, the fixed arm is fixedly connected with a lower band ring, and the lower band ring is fixedly connected with the metal wing. And the lower band ring is used for being fixed on a mandibular abutment tooth. And a metal rod parallel to the screw rod is fixed on the fixed arm and penetrates through the through hole in the movable arm. And the movable arm can move along the metal rod. The metal rod can stabilize the whole structure. The patient rotates the screw rod to drive the metal wings to move left and right to adjust the distance when wearing the mask. The lock is manufactured by crossing the retainer and the metal wing, and the operation is simple and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a mandibular retrusion corrector with stable locking. Background Art

[0002] Mandibular retrusion is a type of malocclusion caused by mandibular hypoplasia or congenital lack of lower front teeth and incomplete function of the lateral pterygoid muscles. It seriously affects the appearance and mental health. Its correction must be based on the age of the patient. Patients in the growth and development period can undergo orthodontic treatment. Mandibular retrusion corrector is often used for orthodontic treatment of patients with mandibular retrusion. Traditional correctors are integral casts of the upper and lower teeth. The upper and lower metal wings achieve a locking effect to prevent the mandible from receding, thereby promoting adaptive changes in skeletal muscle nerve reflexes and promoting mandibular development. Such as Figure 1-2 shown.

[0003] In order to simplify the form of overall fixation of multiple teeth in the upper and lower jaws, the inventor adopted a ring to retain a single tooth. The original metal wing of the mandibular part is designed as a screw nut structure, which can be rotated to adjust the distance. By rotating the screw when the patient wears it, the screw moves left and right with the cooperation of the nut, so as to achieve the purpose of gradual correction. However, there is a point contact between the screw and the retainer. Due to the complexity of the movement of the mandible (front and back, left and right, and sideways), its locking effect is not strong. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a mandibular retrusion corrector with stable locking. The metal wing and the retainer are cross-locked, the locking effect is good, the position is not shifted during wearing, the locking distance can be adjusted, and the operation is convenient.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mandibular retrusion corrector with stable locking, comprising a retainer and a metal wing, the retainer and the metal wing are cross-contacted, the back of the retainer is fixedly connected with an upper belt ring, the upper belt ring is used to be fixed on the maxillary abutment teeth, the metal wing is connected to a movable arm, the movable arm and the fixed arm are movably connected by a screw, the fixed arm is fixedly connected to a lower belt ring, and the lower belt ring is used to be fixed on the mandibular abutment teeth.

[0006] The movable arm and the fixed arm are provided with screw holes, and the screw rod passes through the screw holes and matches with the threads in the screw holes. The spiral directions of the threads on the screw rod from the middle to the two ends are opposite, and the thread directions of the screw holes on the movable arm and the fixed arm are also opposite. Therefore, when the screw rod rotates, the movable arm and the fixed arm can be separated.

[0007] As an optimization, a metal rod parallel to the screw rod is fixed on the fixed arm and passes through the through hole on the movable arm. The movable arm can move along the metal rod. The metal rod can stabilize the overall structure.

[0008] The retainer is nested on the maxillary abutment through the upper band ring. The retainer plays a blocking role. After the mandible is stretched forward, the metal wing is connected to the lower band ring, and the lower band ring is nested and fixed on the mandibular abutment. After the moving arm is adjusted to a suitable distance, the metal wing abuts against the retainer.

[0009] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0010] The mandibular retrusion corrector of the utility model can adjust the correction distance. The mandibular retrusion corrector of the utility model rotates the screw when the patient wears it, and the metal wing moves left and right with the cooperation of the screw. After moving to the desired position, the rotation is stopped. In addition, the retainer and the metal wing of the present invention are obliquely crossed, and the position of the upper and lower contact surfaces is the same as the contact form of the existing integral casting corrector. Since the retainer and the metal wing are in surface contact, not point contact, a better locking effect can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the occlusal view of the existing mandibular retrusion corrector.

[0012] Figure 2 This is the buccal view of the existing mandibular retrusion corrector.

[0013] Figure 3 It is a structural schematic diagram of the utility model.

[0014] Figure 4 This is a schematic diagram of the use of the utility model.

[0015] In the figure: 1 retainer, 2 metal wing, 3 screw, 4 upper belt ring, 5 lower belt ring, 6 metal rod, 7 movable arm, 8 fixed arm. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 3-4In this embodiment, a locking and stable mandibular retrusion corrector comprises a retainer 1 and a metal wing 2, wherein the retainer 1 and the metal wing 2 cross and interfere with each other, an upper band ring 4 is fixedly connected to the back of the retainer 1, and the upper band ring 4 is used to be fixed on the maxillary abutment teeth, the metal wing 2 is connected to a movable arm 7, and the movable arm 7 and a fixed arm 8 are movably connected through a screw 3, and the fixed arm 8 is fixedly connected to a lower band ring 5, and the lower band ring 5 is used to be fixed on the mandibular abutment teeth.

[0018] The movable arm 7 and the fixed arm 8 are provided with screw holes, and the screw rod 3 passes through the screw holes and matches with the threads in the screw holes. The spiral directions of the threads on the screw rod from the middle to the two ends are opposite, and the thread directions of the screw holes on the movable arm and the fixed arm are also opposite. Therefore, when the screw rod rotates, the movable arm and the fixed arm can be separated.

[0019] As an optimization, a metal rod 6 parallel to the screw rod 3 is fixed on the fixed arm 8 and passes through the through hole on the movable arm 7. The movable arm 7 can move along the metal rod 6. The metal rod can stabilize the overall structure.

[0020] The retainer 1 is wide at the top and narrow at the bottom. The lower part is designed to be narrower, which is convenient for the lateral movement of the mandible and reduces the discomfort of the patient during wearing. Under normal circumstances, the mandible can not only move forward and backward, but also move sideways to the left and right.

[0021] The retainer 1 and the upper belt ring 4 of the utility model are prefabricated together and have various specifications according to common tooth shapes and sizes. The fixed arm 8 and the lower belt ring 5 are also prefabricated together and have various specifications according to common tooth shapes and sizes. The screw rod 3 can be prefabricated into several lengths.

[0022] The retaining body 1, the metal wing 2, the screw rod 3, the upper belt ring 4 and the lower belt ring 5 are made of stainless steel.

[0023] During clinical installation, according to the patient's teeth, after several attempts, the upper band ring 4 and the lower band ring 5 of suitable specifications can be found. According to the distance to be adjusted, a qualified screw rod 3 can be selected for matching. The upper screw rod 3 can be installed and adjusted to a suitable position.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A locking and stable mandibular retrusion corrector, characterized in that: The invention comprises a retainer (1) and a metal wing (2), wherein the retainer (1) and the metal wing (2) are cross-contacted, an upper belt ring (4) is fixedly connected to the back of the retainer (1), and the upper belt ring (4) is used to be fixed on the maxillary abutment tooth, the metal wing (2) is connected to the movable arm (7), the movable arm (7) and the fixed arm (8) are movably connected via a screw rod (3), the fixed arm (8) is fixedly connected to the lower belt ring (5), and the lower belt ring (5) is used to be fixed on the mandibular abutment tooth, the movable arm (7) and the fixed arm (8) are provided with screw holes, the screw rod (3) passes through the screw hole and matches with the thread in the screw hole, the screw thread on the screw rod (3) has opposite spiral directions from the middle to the two ends, and the screw threads on the movable arm (7) and the fixed arm (8) are also in opposite directions.

2. The mandibular retrusion corrector according to claim 1, characterized in that: A metal rod (6) parallel to the screw rod (3) is fixed on the fixed arm (8) and passes through a through hole on the movable arm (7).

3. The mandibular retrusion corrector according to claim 1, characterized in that: The retaining body (1) is wide at the top and narrow at the bottom.

4. The mandibular retrusion corrector according to claim 1, characterized in that: The retaining body (1), the metal wing (2), the screw rod (3), the upper belt ring (4) and the lower belt ring (5) are made of stainless steel.

5. The mandibular retrusion corrector according to claim 1, characterized in that: The retaining body (1) and the upper belt ring (4) are prefabricated together, and the fixing arm (8) and the lower belt ring (5) are prefabricated together.

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