CN209864005U

CN209864005U - Novel built-in arc-shaped distractor

Info

Publication number: CN209864005U
Application number: CN201821287593.4U
Authority: CN
Inventors: 周丽斌; 徐冰血
Original assignee: Stomatological Hospital of Guangzhou Medical University
Current assignee: Stomatological Hospital of Guangzhou Medical University
Priority date: 2018-08-10
Filing date: 2018-08-10
Publication date: 2019-12-31
Anticipated expiration: 2028-08-10

Abstract

The utility model relates to a novel built-in arc distractor. The novel built-in arc-shaped distractor comprises a fixed plate provided with a first through hole, an arc-shaped guide rail is fixedly connected to one side of the fixed plate, and an arc-shaped groove is formed in the arc-shaped guide rail; the fixed plate is movably connected with a screw rod; the screw rod is sleeved with a cylinder, and the screw rod is connected with the cylinder through threads; one end cover of screw rod is equipped with the coaptation board, be equipped with the second through-hole on the coaptation board, the coaptation board can be followed the arc wall slides, the screw rod can for the coaptation board free rotation. The utility model provides a novel built-in arc distractor passes through the specific cooperation between drum, screw rod and the coaptation board and is used for realizing that the arc leads the process of stretching, and is easy and simple to handle, practical, and centre gripping, shearing effort are little during the use, and little and more durable to the tissue damage.

Description

Novel built-in arc-shaped distractor

Technical Field

The utility model belongs to the technical field of medical instrument, more specifically relates to a novel built-in arc distractor.

Background

In the prior art, due to the application of a distraction osteogenesis technology, the defects of maxillofacial bone deformity and jaw defect repair and reconstruction which are difficult to correct by a plurality of conventional surgical technologies are solved. However, most of the current clinical stretching techniques employ linear traction for repairing simple linear bone defects such as the mandible body and the ascending branch. The maxillofacial bone is connected in a curve at a plurality of positions, and the linear distractor has difficult ideal effects at the positions, especially the jaw chin and the lower jaw angle area with obvious curvature.

The arc-shaped distractor can complete the task which can not be completed by the linear bone distractor, and realizes the breakthrough in the traction mode, so that the distraction osteogenesis technology can be deeper, and the efficiency of the distraction osteogenesis technology can be more comprehensively exerted. However, the difficulty of the design and the manufacture of the arc-shaped distractor is far greater than that of the linear distractor. At present, the arc tractive ware is mostly external, has that volume, weight are big, and the structure is complicated, influences patient's pleasing to the eye, shortcomings such as easy collision. In addition, the external instrument has a large distance with cortical bone, so that most traction force during traction and force application is converted into bending moment of the steel nail or bone nail, but not completely converted into traction distance between broken ends, which easily causes a large difference between traction scale and designed bone extension amount. More seriously, local edema and infection are easily caused during traction, facial nerves are damaged, scars are left on the face after traction, and the phenomenon is more obvious when the traction amount is larger.

The internal arch distraction osteogenesis is under study, and the few proposed distractors have many disadvantages. For example, patent ZL201510051701.2 discloses a built-in arc distractor, which comprises 3 main components: an arc-shaped guide rail connected with the fixing plate, a screw rod connected with the universal joint and a bone fracture plate (capable of moving along the arc-shaped guide rail) containing a guide post. The bone fracture plate is pushed to move by rotating the universal joint and the screw rod, and the movement of the bone fracture plate is limited by the constraint of the arc-shaped guide rail, so that the arc-shaped stretching bone forming movement is realized.

In the application process of the built-in arc-shaped distractor, the main body is placed in the body, and only the driving rod of the universal joint penetrates out of the skin and is exposed out of the body. In the stretching process of being placed in a body, the position of the screw rod is gradually changed along with the movement of the bone fracture plate along the arc-shaped guide rail, the tail end of the screw rod swings to a larger extent from stretching to stretching, a clamping and shearing effect is formed between the screw rod and the arc-shaped guide rail, and the tissue structure between the screw rod and the arc-shaped guide rail is possibly damaged. Due to the design, tissues such as muscles and fat are clamped between the screw rod and the arc-shaped guide rail, the movement of the screw rod is blocked, the resistance in the traction and stretching process is increased, the traction and stretching device is possibly damaged, and the arc-shaped traction and stretching process with the preset length cannot be completed.

Therefore, the built-in arc distractor which is simple and practical to operate, small in clamping and shearing force during use, small in tissue damage and more durable is developed, and has great research significance and application value.

Disclosure of Invention

The utility model aims to overcome that built-in arc among the prior art leads a ware when using centre gripping, shearing effort are big, easily constitute the damage to the tissue and cause the defect of leading a ware damage not enough, provide a novel built-in arc leads a ware. The utility model provides a novel built-in arc distractor passes through the specific cooperation between drum, screw rod and the coaptation board and is used for realizing that the arc leads the process of stretching, and is easy and simple to handle, practical, and centre gripping, shearing effort are little during the use, and little and more durable to the tissue damage.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

a novel built-in arc-shaped distractor comprises a fixed plate provided with a first through hole, wherein an arc-shaped guide rail is fixedly connected to one side of the fixed plate, and an arc-shaped groove is formed in the arc-shaped guide rail; the fixed plate is movably connected with a screw rod; the screw rod is sleeved with a cylinder, and the screw rod is connected with the cylinder through threads; one end cover of screw rod is equipped with the coaptation board, be equipped with the second through-hole on the coaptation board, the coaptation board can be followed the arc wall slides, the screw rod can for the coaptation board free rotation.

The utility model provides a novel built-in arc tractive ware passes through the specific cooperation between drum, screw rod and the coaptation board and is used for realizing the arc tractive process: the screw rod and the cylinder are in threaded connection, the screw rod can move forwards relative to the cylinder by rotating the screw rod, and meanwhile, the tail end of the screw rod pushes the bone fracture plate to do arc motion along the arc-shaped guide rail, so that arc stretching is realized. The cylinder with smooth appearance penetrates out of the skin, so that a seal can be formed between the cylinder and the skin; the tail end of the screw is connected with the bone fracture plate, so that the microbial pollution stretching area can be reduced to the greatest extent, and meanwhile, the tail end of the screw can freely rotate relative to the bone fracture plate, and the bone fracture plate does not move along the long axis of the screw, so that the clamping and shearing actions between the propelling screw and the arc-shaped guide rail are eliminated; in addition, the cylinder can rotate along with the swinging of the screw rod, but the rotation amplitude is small, and the local skin cannot be seriously damaged.

The built-in arc-shaped distractor provided by the utility model is simple to operate and use; when in use, the clamping and shearing acting force between the screw rod and the bone plate is small, the damage to tissues is small, the resistance is small, the traction device cannot be damaged, and the bone plate is more durable.

The arrangement of the first through hole may be used to achieve fixation between the fixation plate and the bone.

Preferably, the number of the first through holes is multiple, and the first through holes are symmetrically distributed at two ends of the fixing plate.

The first through holes which are symmetrically arranged can realize better fixation of the first through holes and the second through holes.

The utility model has no special requirement on the shape of the fixing plate, and can be in the conventional shape.

Preferably, the fixing plate is rectangular, circular or oval.

Preferably, the fixed plate is further provided with a connecting plate capable of axially rotating, the connecting plate is provided with a hole matched with the screw rod, and one end of the screw rod penetrates through the hole and can move along the arc-shaped groove.

Through the arrangement of the connecting plate, the movable connection of the screw rod can be better realized, so that the screw rod can move along the arc-shaped groove.

Preferably, the connecting plate and the fixing plate are connected by a bolt structure.

The two are connected through a bolt structure, and the connecting plate can rotate relative to the fixing plate.

The radian of the arc-shaped guide rail can be selected according to the requirement of arc stretching.

Preferably, the arc of the arcuate guide rail is 30 ° ~ 120 °.

More preferably, the arc of the arcuate guide rail is 60 °, 75 ° or 90 °.

Preferably, a guide post capable of moving along the arc-shaped groove is arranged in the arc-shaped groove, the guide post is connected with the bone fracture plate, a slide block is further arranged on the guide post, the slide block is sleeved at the tail end of the screw rod, and the screw rod can rotate relative to the slide block.

The pushing screw can push the bone fracture plate to move along the arc-shaped groove by matching the slide block and the guide pillar, so that the stretching process is better realized.

Preferably, the bone fracture plate is I-shaped, and the guide post is arranged at the central position of the bone fracture plate.

Preferably, the second through holes are multiple and symmetrically arranged at two ends of the bone plate.

Preferably, the thread pitch of the screw is 0.5 mm-2 mm.

More preferably, the pitch of the thread on the screw is 1 mm.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model provides a novel built-in arc distractor passes through the specific cooperation between drum, screw rod and the coaptation board and is used for realizing that the arc leads the process of stretching, and is easy and simple to handle, practical, and centre gripping, shearing effort are little during the use, and little and more durable to the tissue damage.

Drawings

FIG. 1 is a schematic structural diagram of a novel built-in arc-shaped distractor provided in embodiment 1;

fig. 2 is a schematic structural view of a fixing plate provided in embodiment 1;

FIG. 3 is a schematic structural view of the bone plate provided in example 1;

wherein: 1 is a fixing plate, and 101 is a first through hole; 2 is an arc guide rail; 3 is an arc-shaped groove; 4 is a screw rod; 5 is a cylinder; 6, a bone fracture plate, 601 is a second through hole; 7 is a connecting plate, 8 is a hole, 9 is a guide post and 10 is a slide block.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

It will be understood that when an element is referred to as being "disposed on" or "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Example 1

The embodiment provides a novel built-in arc-shaped distractor, as shown in fig. 1, comprising a fixing plate 1 provided with a first through hole 101, wherein one side of the fixing plate 1 is fixedly connected with an arc-shaped guide rail 2, and the arc-shaped guide rail 2 is provided with an arc-shaped groove 3; a screw rod 4 is movably connected on the fixed plate 1; the cylinder 5 is sleeved on the screw rod 4, the screw rod 4 is provided with external threads, the thread pitch can be 0.5 mm-2 mm, and in the embodiment, the thread pitch is 1 mm. The inner wall of the cylinder 5 is provided with an internal thread matched with the external thread, and the screw rod 4 and the cylinder 5 are connected in a matching way through the internal thread and the external thread; one end cover of screw rod 4 is equipped with coaptation board 6, is equipped with second through-hole 601 on the coaptation board 6, and coaptation board 6 can slide along arc wall 3, and screw rod 4 can be for coaptation board 6 free rotation.

The shape of the fixing plate 1 can be selected according to actual needs, and in this embodiment, the fixing plate 1 is rectangular. The first through holes 101 can be used for fixing the bone surface to be operated and the fixing plate 1, and in order to realize better fixation of the fixing plate 1 and the bone surface, the number of the first through holes 101 is multiple and symmetrically distributed at two ends of the fixing plate 1.

As shown in fig. 2, the connection relationship between the fixing plate 1 and the screw rod 4 is as follows: be provided with the connecting plate 7 of L type on the fixed plate 1, the bottom of connecting plate 7 and fixed plate 1 pass through bolt construction swing joint, so connecting plate 7 can be rotatory around the bolt that both meet, be provided with on the connecting plate 7 with screw rod 4 matched with hole 8, hole 8 is worn to locate by the one end of screw rod 4 to can follow the motion of arc wall 3, thereby realize swing joint.

As shown in fig. 3, a guide post 9 capable of moving along the arc-shaped groove 3 is arranged in the arc-shaped groove 3, the guide post 9 is connected with the bone fracture plate 6, a slide block 10 is further arranged on the guide post 9, a threaded hole is formed in the slide block 10, and the tail end of the screw rod 4 is sleeved with the threaded hole, so that the screw rod 4 can rotate relative to the slide block 10. The pushing screw rod 4 can push the bone fracture plate 6 to move along the arc-shaped groove 3 through the matching of the slide block 10 and the guide pillar 9, and the stretching process is better realized.

The shape of the bone plate 6 can be selected according to the requirement, in the embodiment, the bone plate 6 is I-shaped, and the guide post 9 is arranged at the central position of the bone plate 6. The second through-hole 601 allows the bone plate 6 to be connected to the bone piece to be moved, thereby driving the bone piece to move. In order to achieve better driving effect, the second through holes 601 are multiple and symmetrically arranged at two ends of the bone fracture plate 6.

The radian of the arc-shaped guide rail 2 can be individually manufactured according to the traction distance and the moving radian of the arc-shaped traction, and is generally 30 degrees ~ 120 degrees, in this embodiment, the radian of the arc-shaped guide rail 2 is 60 degrees, and other radians such as 75 degrees, 90 degrees and the like can be selected.

Claims

1. A novel built-in arc-shaped distractor is characterized by comprising a fixing plate (1) provided with a first through hole (101), wherein an arc-shaped guide rail (2) is fixedly connected to one side of the fixing plate (1), and an arc-shaped groove (3) is formed in the arc-shaped guide rail (2); a screw rod (4) is movably connected to the fixed plate (1); the screw (4) is sleeved with a cylinder (5), and the screw (4) is in threaded connection with the cylinder (5); one end cover of screw rod (4) is equipped with coaptation board (6), be equipped with second through-hole (601) on coaptation board (6), coaptation board (6) can be followed arc wall (3) slide, screw rod (4) can for coaptation board (6) free rotation.

2. The novel built-in arc-shaped distractor of claim 1, wherein the number of the first through holes (101) is multiple and symmetrically distributed at two ends of the fixing plate (1).

3. The novel built-in arc-shaped distractor according to claim 1, wherein the fixing plate (1) is rectangular, circular or oval.

4. The novel built-in arc-shaped distractor according to claim 1, wherein a connecting plate (7) capable of axially rotating is further arranged on the fixing plate (1), a hole (8) matched with the screw rod (4) is formed in the connecting plate (7), and one end of the screw rod (4) penetrates through the hole (8) and can move along the arc-shaped groove (3).

5. The novel built-in arc-shaped distractor according to claim 4, wherein the connecting plate (7) is L-shaped, and the bottom surface of the connecting plate (7) is movably connected with the fixing plate (1) through a bolt structure.

6. The novel built-in arc-shaped distractor according to claim 1, wherein the radian of the arc-shaped guide rail (2) is 30-120 °.

7. The novel built-in arc-shaped distractor according to claim 2, characterized in that the arc of the arc-shaped guide rail (2) is 60 °, 75 ° or 90 °.

8. The novel built-in arc distractor of claim 1, wherein a guide post (9) capable of moving along the arc groove (3) is arranged in the arc groove (3), the guide post (9) is connected with the bone fracture plate (6), a slide block (10) is further arranged on the guide post (9), the slide block (10) is sleeved at the tail end of the screw rod (4), and the screw rod (4) can rotate relative to the slide block (10).

9. The novel built-in arc distractor of claim 8, wherein the bone plate (6) is I-shaped, and the guide post (9) is arranged at the center of the bone plate (6).

10. The novel built-in arc distractor of claim 9, wherein the second through holes (601) are multiple and symmetrically arranged at two ends of the bone plate (6).