Adjustable mandibular retraction corrector

Abstract

The utility model relates to an adjustable mandibular retraction corrector, and belongs to the field of medical instruments. Each pair comprises a retainer and a screw cap, the screw cap is connected with a screw rod through an internal thread, the back surface of the retainer is fixedly connected with an upper belt ring, the upper belt ring is used for being fixed on an upper jaw abutment, the back surface of the screw cap is fixedly connected with a lower belt ring, the lower belt ring is used for being fixed on a lower jaw abutment, and the upper belt ring and the lower belt ring are fixedly connected. A through hole perpendicular to the axial direction is formed in the screw rod, or a filling groove parallel to the axial direction is formed in the surface of the screw rod. When a patient wears the mask, the screw rod is rotated to move left and right, and the rotation is stopped after the screw rod moves to a required position. The screw is fixed in a steel wire binding or photosensitive resin curing mode, operation is easy and convenient, and fixation is reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an adjustable mandibular retrusion corrector. Background Art

[0002] Mandibular retrusion is a malocclusion with mandibular recession caused by mandibular hypoplasia or congenital lack of lower front teeth and incomplete function of lateral pterygoid muscles. Mandibular retrusion is not common and is often confused with maxillary protrusion. Its main appearance is short chin, short lower 1 / 3 of the face, and a "bird's beak"-like appearance when viewed from the side, which seriously affects the appearance and mental health. Its correction must adopt different methods according to the patient's age. Patients in the growth and development period can undergo orthodontic treatment, and adult patients can undergo orthognathic surgery.

[0003] When performing orthodontic treatment on patients with mandibular retrusion, mandibular retrusion appliances are often used for treatment.

[0004] Traditional braces are made by casting the upper and lower teeth as a whole, and the upper and lower metal wings are used to lock the mandible and prevent it from receding, thereby promoting the adaptive changes of skeletal muscle nerve reflexes and promoting the development of the mandible. Figure 1 shown.

[0005] 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 and nut structure, which can be rotated to adjust the distance. The front end is movable and adjustable as a whole, and the mandibular position is moved forward by turning the screw to continuously move to the left. The rear end is fixed as a whole with the ring. In the patent 2022202473368 previously applied for by the inventor, the screw adjusted into place is fixed by a locking nut to prevent rotation and displacement during wearing. However, in actual clinical processes, the fixation effect is not good because the precision manufacturing process is difficult to achieve. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides an adjustable mandibular retrusion corrector with good retention effect. After the screw is adjusted into place, the corrector has good retention effect, does not shift during wearing, and is easy to operate.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an adjustable mandibular retrusion corrector, in two pairs, installed on both sides of the jaw, each pair comprising a retainer and a nut, the nut being connected to a screw rod via an internal thread, an upper band ring being fixedly connected to the back side of the retainer, the upper band ring being used to be fixed on the maxillary abutment teeth, a lower band ring being fixedly connected to the back side of the nut, the lower band ring being used to be fixed on the mandibular abutment teeth, the screw rod being provided with a through hole perpendicular to the axial direction, or a filling groove being provided on the surface of the screw rod being parallel to the axial direction.

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

[0009] When the through hole on the screw is used for fixation, after the screw is adjusted to a suitable position, the steel wire is passed through the through hole and fixed with the mandibular abutment. This plays a role in fixing the screw. When readjustment is required next time, the steel wire is cut off, and the screw is adjusted to a suitable position and then fixed with the steel wire again.

[0010] When the surface adopts a filling groove, after the screw is adjusted to a suitable position, fill the filling groove with photosensitive resin and cure it by ultraviolet irradiation. Since the integrity of the screw thread surface is destroyed, the cured resin makes the screw surface rough, so that the screw cannot rotate, achieving the purpose of fixation. The filling grooves can be two, symmetrically distributed on both sides of the screw. When adjusting next time, you can pick out the resin and fix it again.

[0011] In order to prevent the upper and lower band rings from rotating during the occlusion of the upper and lower teeth, sharp corner rings are provided on the upper and lower band rings. The design of the sharp corner rings is that when the upper and lower teeth interact with each other, the force will produce rotational force on the teeth. The sharp corner rings are used to contact the adjacent abutment teeth and can be used to resist torque.

[0012] In order to resist twisting, the upper and lower band rings of the left and right braces can be connected by connecting rods. This lingual connection method similar to that of non-adjustable braces allows the two-side braces to be connected as one, thereby resisting twisting.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] The mandibular retrusion corrector of the present invention can adjust the correction distance. Different patients require different correction distances. Even for the same patient, since children have limited tolerance for oral discomfort, it is often difficult for child patients to tolerate it in one step. The mandibular retrusion corrector with adjustable distance of the present invention rotates the screw when the patient wears it, and the screw moves left and right with the cooperation of the nut. After the screw moves to the desired position, it stops rotating and is fixed. In addition, the present invention fixes the screw after it is adjusted into place by adding a steel wire to the through hole on the screw, or by adding a photosensitive resin to the filling groove. The operation is convenient, and the adjustable method realizes a gradual correction process, which is more in line with the law of tooth and bone growth, and the patient is more comfortable and easier to persist in wearing, thereby achieving a better correction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an existing mandibular retrusion corrector.

[0016] Schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of an implementation method of the utility model.

[0018] Figure 3 It is a structural schematic diagram of another implementation mode of the utility model.

[0019] Figure 4 Schematic diagram of the cross section of the screw and filling slot.

[0020] Figure 5 Schematic diagram of a corrector with a sharp corner embrace.

[0021] Figure 6 Schematic diagram of a corrector with a connecting rod.

[0022] Figure 7 It is a brace with a corrective archwire.

[0023] Figure 8 A corrector for deep overbite.

[0024] In the figure: 1 retainer, 2 nut, 3 screw rod, 4 upper belt ring, 5 lower belt ring, 6 through hole, 7 filling groove, 8 sharp corner embrace, 9 connecting rod, 10 steel wire, 11 correction arch wire. DETAILED DESCRIPTION

[0025] 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.

[0026] See also Figure 2-4 In this embodiment, an adjustable mandibular retrusion corrector is provided in two pairs, which are installed on both sides of the jaw. Each pair includes a retainer 1 and a nut 2, wherein the nut 2 is connected to a screw rod 3 through an internal thread, 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 teeth, and a lower belt ring 5 is fixedly connected to the back of the nut 2, and the lower belt ring 5 is used to be fixed on the mandibular abutment teeth. The screw rod 3 has a through hole 6 perpendicular to the axial direction, or a filling groove 7 parallel to the axial direction is provided on the surface of the screw rod.

[0027] The retainer 1 plays a blocking role. After the mandible is pulled forward, the screw 3 is fixed on the lower band ring 5, and the lower band ring 5 is fixed on the mandibular abutment. The screw 3 is against the retainer 1, and the retainer 1 blocks the screw 3 and the mandible from retreating. In this way, the retracted mandible is corrected, and for children in the growth and development period, generally a good correction effect can be achieved.

[0028] 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.

[0029] 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 nut 2 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.

[0030] The retainer 1, nut 2, screw rod 3, upper belt ring 4 and lower belt ring 5 are made of stainless steel.

[0031] 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 1 can be selected for matching. After the upper screw rod 1 is installed and adjusted to a suitable position, the position is fixed by tying it through the through hole with a steel wire 10, or by filling the filling groove with a photosensitive resin.

[0032] The upper and lower band rings are provided with sharp corners 8, which are designed to produce a rotational force on the teeth when the upper and lower teeth interact with each other, and the sharp corners are used to abut against the adjacent abutment teeth, and can be used to resist torque. Figure 5 shown.

[0033] In order to resist twisting, the upper and lower band rings of the left and right braces can also be connected by connecting rods 9. This lingual connection method similar to that of non-adjustable braces allows the two-sided braces to be connected as one, thereby resisting twisting. Figure 6 shown.

[0034] Furthermore, a correction archwire 11 is laterally connected between the retainers and the screws distributed on both sides of the jaw, which can correct the problem of uneven front teeth while correcting the mandibular retraction. Figure 7 shown.

[0035] In addition, if the nut and screw are not in front of the lower band ring, but fixed upward on the occlusal surface, it can be used to correct cases of mandibular retrusion with deep overbite, such as Figure 8 shown.

[0036] 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. An adjustable mandibular retrusion corrector, characterized in that: There are two pairs of retainers, which are installed on both sides of the jaw. Each pair includes a retainer (1) and a nut (2). The nut (2) is connected to a screw (3) via an internal thread. The back of the retainer (1) is fixedly connected to an upper belt ring (4), and the upper belt ring (4) is used to be fixed on the maxillary abutment teeth. The back of the nut (2) is fixedly connected to a lower belt ring (5), and the lower belt ring (5) is used to be fixed on the mandibular abutment teeth. The screw (3) has a through hole (6) perpendicular to the axial direction, or the surface of the screw has a filling groove (7) parallel to the axial direction.

2. 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.

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

4. 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 nut (2) and the lower belt ring (5) are prefabricated together.

5. The mandibular retrusion corrector according to claim 1, characterized in that: There are two filling grooves, which are symmetrically distributed on both sides of the screw.

6. The mandibular retrusion corrector according to claim 1, characterized in that: The upper belt ring and the lower belt ring are provided with sharp corners (8).

7. The mandibular retrusion corrector according to claim 1, characterized in that: The upper belt rings on the left and right sides and the lower belt rings are connected via a connecting rod (9).

8. The mandibular retrusion corrector according to claim 1, characterized in that: A correction arch wire (11) is respectively connected transversely between the retainers and the screw rods on the left and right sides.

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