CN219109700U - Jaw tractor - Google Patents

Abstract

The utility model relates to a jaw tractor, which comprises a sleeve, a fixed titanium plate and an active titanium plate, wherein the sleeve is provided with a sliding groove along the length of the sleeve; the fixed titanium plate and the movable titanium plate are U-shaped and are integrally formed by a connecting plate and two fixing plates respectively arranged on two sides of the connecting plate, the fixing plates of the fixed titanium plate and the fixing plates on the same side of the movable titanium plate are arranged on the same horizontal straight line, and a plurality of screw holes are formed in the fixing plates at intervals in the direction of the side of the opening side to the connecting side. The utility model designs the fixed titanium plate and the movable titanium plate which are both U-shaped, thereby realizing double-side fixation and ensuring that the jaw tractor is not easy to move. The fixed plate of fixed titanium board and the same side fixed plate of activity titanium board are on same horizontal straight line, are difficult to produce the component, and fixed titanium board and activity titanium board all pull according to the direction of original settlement, guarantee treatment.

Description

Jaw tractor

Technical Field

The utility model relates to the technical field of maxillofacial surgical instruments, in particular to a jaw tractor.

Background

The distraction osteogenesis (Distraction Osteogenesis, DO) is achieved by using a special traction device after osteotomy, and slowly pulling to form new bone in the osteotomy gap, thereby achieving the purpose of bone extension.

Chinese patent CN201147362Y discloses a mandibular column-shaped unidirectional built-in distractor, which comprises a rotating handle, a cardan shaft, a fixed wing, a traction screw and a movable wing, wherein the traction screw is in tight fit threaded connection with the movable wing, and the inner part of an inner guiding column of the movable wing is in tight fit sliding connection with the inner side wall of the inner guiding column. The inner circular guide cylinder can not only realize accurate guide of the movable wings, but also enable the screw thread transmission to be arranged inside the cylinder, thereby avoiding adhesion between soft tissues and the stretching device during operation. However, the fixed wing or the movable wing is fixed on only one side, so that the fixing performance is poor, and the position of the tractor is easy to change; meanwhile, when the fixed wing is pulled, the pulling direction of the fixed wing and the pulling direction of the movable wing are not in the same straight line, so that the pulling direction is easy to deviate from the originally set direction, the bone extension direction is influenced, and the treatment effect is influenced.

Therefore, a jaw tractor for fixing and stabilizing the inside of the oral cavity is designed.

Disclosure of Invention

The utility model aims to provide a jaw tractor which is fixed and stable in the oral cavity.

In order to solve the technical problems, the utility model provides a jaw tractor which comprises a sleeve, a fixed titanium plate and an active titanium plate, wherein a sliding groove is formed in the sleeve along the length of the sleeve; the fixed titanium plate and the movable titanium plate are U-shaped and are integrally formed by a connecting plate and two fixing plates respectively arranged on two sides of the connecting plate, the fixing plates of the fixed titanium plate and the fixing plates on the same side of the movable titanium plate are arranged on the same horizontal straight line, and a plurality of screw holes are formed in the fixing plates at intervals in the direction of the side of the opening side to the connecting side.

In at least one embodiment, the number of screw holes is 6, and the distance between two adjacent screw holes is 3mm < L1<5mm. The fixed plate is provided with a counter bore at the position corresponding to the screw hole, the counter bore is communicated with the screw hole to form an annular step surface, and the caliber of the counter bore is larger than the aperture of the screw hole.

The utility model at least realizes the following beneficial effects:

1. the utility model designs the fixed titanium plate and the movable titanium plate which are both U-shaped, thereby realizing double-side fixation and ensuring that the jaw tractor is not easy to move.

2. The fixed plate of fixed titanium board and the same side fixed plate of activity titanium board are on same horizontal straight line, are difficult to produce the component, and fixed titanium board and activity titanium board all pull according to the direction of original settlement, guarantee treatment.

Drawings

One or more embodiments of the present utility model will now be described, by way of example only, with reference to the accompanying drawings, in which:

FIG. 1 is a perspective view of one embodiment of the present utility model;

FIG. 2 is a cross-sectional view of the embodiment of FIG. 1;

fig. 3 is a perspective view of the sleeve of the embodiment of fig. 1.

The reference numerals in the figures are: 1. a sleeve; 2. fixing a titanium plate; 3. an active titanium plate; 4. a screw; 5. a rotating handle; 6. a universal joint; 11. a sliding groove; 21. a connecting plate; 22. a fixing plate; 23. screw holes; 24. countersink; 31. a sliding block.

Detailed Description

The utility model will be described in detail hereinafter with reference to exemplary embodiments in the accompanying drawings. It should be understood, however, that this utility model may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the utility model to those skilled in the art.

In the description of the present utility model, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present utility model.

Aims at the defect that the jaw tractor in the prior art is easy to cause the position change of the tractor. The inventors have found after careful analysis that the above technical problems occur mainly because: (1) The jaw tractor in the prior art is fixed only on one side, and the jaw tractor is poor in fixation, so that the position of the tractor is easy to change. (2) When the fixed wing is pulled, the pulling direction of the fixed wing and the pulling direction of the movable wing are not in the same straight line, so that component force is easy to generate, and the component force easily causes the pulling direction to deviate from the originally set direction, thereby influencing the bone lengthening direction and the treatment effect. Based on the analysis, the inventor designs a jaw tractor, and both a fixed titanium plate and an active titanium plate are designed into a U shape, so that double-side fixation is realized, and the jaw tractor is not easy to move.

As shown in fig. 1 to 3, in one embodiment of the present utility model, a jaw tractor includes a sleeve 1, a fixed titanium plate 2 and an active titanium plate 3, wherein the sleeve 1 is provided with a sliding groove 11 along its length, one side of the active titanium plate 3 is slidably extended into the sliding groove 11, and the fixed titanium plate 2 is fixedly connected with one end of the sleeve 1; the fixed titanium plate 2 and the movable titanium plate 3 are U-shaped and are integrally formed by a connecting plate 21 and two fixing plates 22 respectively arranged on two sides of the connecting plate 21, the fixing plates 22 of the fixed titanium plate 2 and the fixing plates 22 on the same side of the movable titanium plate 3 are on the same horizontal straight line, and a plurality of screw holes 23 are formed in the fixing plates 22 at intervals in the direction of the side of the opening side connection.

Alternatively, the number of screw holes 23 is 6, and the distance between two adjacent screw holes 23 is 3mm < L1<5mm. The fixing plate 22 is provided with a counter bore 24 at the position opposite to the screw hole 23, the counter bore 24 is communicated with the screw hole 23 to form an annular step surface, and the caliber of the counter bore 24 is larger than that of the screw hole 23. The counter bore 24 is a conical hole, the periphery of the end head of the screw is propped against the annular step surface, and the screw can be stably fixed and is not easy to shake left and right. The fixing plate 22 has a strip shape. The strip-shaped fixing plate 22 not only can be provided with as many screw holes 23 as possible, but also can be easily placed into the oral cavity, so that the jaw tractor can be conveniently installed in the oral cavity of a patient, and meanwhile, the fixing plate 22 is easily bent to be attached to the bone surface, and the jaw tractor is not easy to loose and deform in the traction process. Compared with the jaw tractor in the prior art, the number of screw holes 23 is large, the tooth root is easy to avoid, the multi-point fixation is found, the jaw tractor is more stably fixed in the oral cavity of a patient, and the jaw tractor is not easy to move. The counter bore 24 is used for accommodating the end head of the screw, and the screw head does not protrude from the upper surface of the fixing plate 22, so that the comfort of a patient is improved.

Alternatively, the distance between the outer peripheries of the two fixing plates 22 fixing the titanium plate 2 is 8mm < l2<10mm. The distance between the peripheries of the two fixing plates 22 is set according to the width of the free maxilla after incision, so that excessive maxilla stripping of a patient is avoided, and the blood supply of bone blocks is prevented from being influenced.

Optionally, the movable titanium plate 3 is provided with a sliding block 31, the sliding block 31 is fixedly connected with the connecting plate 21 of the movable titanium plate 3, and the sliding block 31 can slidably extend into the sliding groove 11. The jaw tractor further comprises a screw 4, the screw 4 is rotatably arranged in the sleeve 1, and the sliding block 31 is sleeved on the screw 4 and is in threaded connection with the screw 4; one end of the screw 4 extends out of the sleeve 1 and is connected with a rotating handle 5. A universal joint 6 is connected between the rotating handle 5 and the screw 4. The universal joint 6 comprises a connecting joint and four connecting shafts, the four connecting shafts are uniformly arranged around the connecting joint to form a cross structure, one end of the screw 4 and one end of the rotary handle 5 are respectively provided with a pair of oppositely arranged lugs, and the four connecting shafts are respectively and rotatably connected with the two pairs of lugs in a one-to-one correspondence. The connecting joint is a sphere. The end of the rotating handle 5 far away from the universal joint 6 is provided with a connecting block for connecting a wrench, and the outer side wall of the connecting block is of a polygonal structure.

The using method of the jaw tractor comprises the following steps:

when in use, firstly, the model of a suitable jaw tractor is selected, the installation position of the tractor is determined, corresponding maxillary soft tissues are cut, the bone surface is exposed, and the fixed titanium plate 2 is fixed at the positions around the cheekbone seam or the edge of the pear-shaped hole at one side of the cut. Because the fixed titanium plate 2 and the movable titanium plate 3 are both U-shaped, the jaw tractor can be applied to left jaws and right jaws, and the application range of the jaw tractor is enlarged. Then, the two fixing plates 22 of the movable titanium plate 3 are fixed at the positions around the cheekbone seam or the edge of the pear-shaped hole at the other side of the incision, the two fixing plates 22 of the fixed titanium plate 2 and the two fixing plates 22 of the movable titanium plate 3 are on the same straight line, component force is not easy to generate, and the fixed titanium plate 2 and the movable titanium plate 3 are pulled according to the originally set direction, so that the treatment effect is ensured. Finally, when the surgeon positions the fixed titanium plate 2 and the movable titanium plate 3, the rotating handle 5 is rotated, the fixed titanium plate 2 and the movable titanium plate 3 generate relative motion, and new bones are continuously formed to fill the gap by utilizing traction force to induce the osteogenesis capability of the jawbone.

It should be understood that all of the above embodiments are exemplary and not limiting, and that various modifications or variations to the specific embodiments described above will be within the scope of the utility model as contemplated by those skilled in the art.

Claims (8)

1. A jaw retractor, characterized in that: the device comprises a sleeve (1), a fixed titanium plate (2) and an active titanium plate (3), wherein the sleeve (1) is provided with a sliding groove (11) along the length of the sleeve, one side of the active titanium plate (3) can slide into the sliding groove (11), and the fixed titanium plate (2) is fixedly connected with one end of the sleeve (1); the fixed titanium plate (2) and the movable titanium plate (3) are U-shaped and are integrally formed by a connecting plate (21) and two fixing plates (22) which are respectively arranged on two sides of the connecting plate (21), the fixing plates (22) of the fixed titanium plate (2) and the fixing plates (22) on the same side of the movable titanium plate (3) are on the same horizontal straight line, and a plurality of screw holes (23) are formed in the fixing plates (22) at intervals in the direction of the side of the opening lateral connection.

2. The jaw retractor of claim 1, wherein: the number of the screw holes (23) is 6, and the distance between every two adjacent screw holes (23) is 3mm < L1<5mm.

3. The jaw retractor of claim 2, wherein: the fixing plate (22) is provided with a counter bore (24) at the position opposite to the screw hole (23), the counter bore (24) is communicated with the screw hole (23) to form an annular step surface, and the caliber of the counter bore (24) is larger than that of the screw hole (23).

4. A jaw retractor according to claim 3, wherein: the counter bore (24) is a conical bore.

5. The jaw retractor of claim 1, wherein: the distance between the peripheries of the two fixing plates (22) of the fixed titanium plate (2) is 8mm < L2<10mm.

6. The jaw retractor of claim 5, wherein: the movable titanium plate (3) is provided with a sliding block (31), the sliding block (31) is fixedly connected with the connecting plate (21) of the movable titanium plate (3), and the sliding block (31) can slidably extend into the sliding groove (11).

7. The jaw retractor of claim 6, wherein: the novel screw comprises a sleeve (1), and is characterized by further comprising a screw (4), wherein the screw (4) is rotatably arranged in the sleeve (1), and a sliding block (31) is sleeved on the screw (4) and is in threaded connection with the screw; one end of the screw rod (4) extends out of the sleeve (1) and is connected with a rotating handle (5).

8. The jaw retractor of claim 7, wherein: a universal joint (6) is connected between the rotating handle (5) and the screw rod (4).

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