Memory fixator for acromioclavicular joint

Abstract

The utility model provides an acromioclavicular joint memory fixator, which relates to the technical field of acromioclavicular joint memory fixators and comprises a lath-shaped fixator spindle, a plurality of groups of clavicle embracing branches, acromion locking branches, clavicle tooth-shaped fixing hooks and acromion arc-shaped fixing hooks. The clavicle tooth-shaped fixing hook and the acromion arc-shaped fixing hook are fixed to the two ends of a batten of the fixator main shaft respectively. The clavicle tooth-shaped fixing hook can be embedded into the clavicle; the clavicle embracing support is fixed on the middle section of the fixator main shaft to deviate from the clavicle section; the acromion locking branch is L-shaped; the L-shaped end of the acromion locking branch is connected with the middle section of the batten of the fixator main shaft; the angle between the acromion locking branch and the extending direction from the fixator main shaft to the acromion arc-shaped fixing hook is 21-25 degrees. The memory fixator for the acromioclavicular joint solves the problem that an acromioclavicular joint fixator in the prior art is poor in stability after fixation, and the fixing stability of the acromioclavicular joint can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of acromioclavicular joint memory fixator, specifically points to acromioclavicular joint memory fixator. BACKGROUND

[0002] Acromioclavicular joint dislocation (and often accompanied by distal fracture) is a common shoulder joint injury in clinic, which can greatly affect the acromioclavicular joint movement and function of the patient (belonging to the scapular belt).

[0003] Rockwood classification is a classification of acromioclavicular joint injury, which classifies acromioclavicular joint injury into 6 types according to the integrity of acromioclavicular ligament and coracoclavicular ligament and joint stability. According to Rockwood classification, type I and type II injuries can be treated conservatively. The treatment of type III injury is controversial. Type IV, type V and type VI injuries all require surgical treatment.

[0004] The surgical treatment of acromioclavicular joint dislocation requires the use of internal fixation methods such as rigid fixation, ligament reconstruction and mixed operation combining the two operation methods. The rigid fixation methods include hook steel plate, screw, steel wire and Kirschner wire. The elastic fixation methods include loop steel plate reconstruction of coracoclavicular ligament, Weaver-Dunn method reconstruction of coracoclavicular ligament, tendon transplantation reconstruction of coracoclavicular ligament and coracoclavicular ligament. Rigid fixation and elastic fixation have their own advantages.

[0005] Based on the characteristics of nickel-titanium memory alloy material and the mechanical properties of multi-dimensional elastic fixation, the acromioclavicular joint micro-memory fixator can take advantage of rigid fixation and elastic fixation. In the prior art, for example, Chinese patent application No. 97242391.5 discloses an acromioclavicular joint dislocation internal fixator, which uses nickel-titanium memory alloy to make a fixator with memory function.

[0006] However, the structure provided by the above-mentioned comparative document is unstable. Because of the Rockwood injury classification of acromioclavicular joint dislocation, type I and type II are relatively stable and do not require surgical treatment, type III, type V, type IV and type VI are damaged due to the coracoclavicular ligament between the coracoid process and the clavicle, the acromioclavicular ligament between the acromion and the distal clavicle, and the distal clavicle is pulled by the sternocleidomastoid muscle, which cannot effectively pull the distal clavicle to the anatomical position, forming instability in the vertical and front-back directions of the acromioclavicular joint.

[0007] The fixed concept of the prior art is to simply rely on the outside hook to be hooked under the acromion, the arc-shaped steel plate body to pass the acromioclavicular joint, and the two inside fixed claws to embrace and fix the clavicle from the front and back of the clavicle. If the prior art is used to fix the acromioclavicular joint dislocation of Rockwood type III and above, it cannot provide vertical stability (because the outside hook is hooked under the acromion for sliding fixation, and the vertical stress will cause stress concentration between the hook end of the outside hook and the acromion, resulting in the risk of bone resorption and stress fracture), and cannot provide horizontal stability (because the acromion fixed hook can slide along the outer edge of the acromion). The prior art is very immature from the perspective of biomechanics, and therefore no similar fixator has been used in clinical treatment for 25 years since the design. Practical new type content

[0008] In view of the above technical problems, the acromioclavicular joint memory fixator provided by the utility model can stably fix the dislocated acromioclavicular joint.

[0009] To achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0010] The utility model provides a shoulder lock joint memory fixer, including the fixer main shaft of board strip, a plurality of groups of clavicle embrace support, acromion lock support, clavicle dentiform fixed hook and acromion arc fixed hook, clavicle dentiform fixed hook with acromion arc fixed hook is fixed in the board strip both ends of fixer main shaft respectively, clavicle dentiform fixed hook with acromion arc fixed hook is curved towards fixer main shaft, clavicle dentiform fixed hook, acromion arc fixed hook, fixer main shaft constitutes a "C" shape, clavicle dentiform fixed hook can be embedded in the clavicle bone quality, clavicle embrace support is fixed on fixer main shaft, clavicle embrace support includes two clavicle embrace branches, two clavicle embrace branches are symmetrically set up in the board strip both sides of fixer main shaft, clavicle embrace branch includes right angle extension section and circular arc embrace section, the both ends of "L" of right angle extension section are connected with the board strip middle section of fixer main shaft, the end of circular arc embrace section respectively, right angle extension section is "L" shape board shape, the "L" board surface of right angle extension section is coplanar with the board strip board surface of fixer main shaft, circular arc embrace section is circular arc board shape, the circular arc board shape of circular arc embrace section is perpendicular to the "L" board surface of right angle extension section, circular arc embrace section sets up in one side of fixer main shaft fixed clavicle dentiform fixed hook with acromion arc fixed hook, the extension direction of "L" of right angle extension section with fixer main shaft fixed end to right angle is perpendicular with the extension direction of the board strip of fixer main shaft, acromion lock support is "L" shape, the "L" one end of acromion lock support is connected with the board strip middle section of fixer main shaft, and the other end is bent towards the direction of acromion arc fixed hook, the extension direction of "L" of acromion lock support with fixer main shaft connection end to "L" right angle, the angle between the extension direction of fixer main shaft to acromion arc fixed hook is 21 DEG to 25 DEG.

[0011] The utility model provides a shoulder lock joint memory fixer, preferably, the clavicle embrace support is one group, the extension direction of "L" of acromion lock support with fixer main shaft connection end to "L" right angle, the angle between the extension direction of fixer main shaft to acromion arc fixed hook is 25 DEG.

[0012] The utility model provides a shoulder lock joint memory fixer, preferably, the clavicle embrace support is two groups, the extension direction of "L" of acromion lock support with fixer main shaft connection end to "L" right angle, the angle between the extension direction of fixer main shaft to acromion arc fixed hook is 21 DEG.

[0013] The utility model provides a shoulder lock joint memory fixer, preferably, it is made of nickel titanium shape memory alloy.

[0014] The utility model provides a memory fixer for acromioclavicular joint, which relates to the technical field of memory fixers for acromioclavicular joint, and comprises a slat-shaped fixer main shaft, several groups of clavicle embracing branches, acromion locking branches, clavicle toothed fixing hooks and acromion arc-shaped fixing hooks; the clavicle toothed fixing hooks and the acromion arc-shaped fixing hooks are respectively fixed to the two ends of the slat of the fixer main shaft; the clavicle toothed fixing hooks and the acromion arc-shaped fixing hooks are bent toward the fixator main shaft; the clavicle toothed fixing hooks, the acromion arc-shaped fixing hooks and the fixator main shaft form a "C" shape; the clavicle toothed fixing hooks can be embedded in the clavicle; the clavicle embracing branch is fixed on the fixator main shaft; the clavicle embracing branch comprises two clavicle embracing branches; the two clavicle embracing branches are symmetrically arranged on both sides of the slat of the fixator main shaft; the clavicle embracing branch comprises a right-angle extension section and a circular arc embracing section; the "L"-shaped ends of the right-angle extension section are respectively aligned with the slat of the fixator main shaft The middle section and the end of the arc embracing section are connected; the right-angle extension section is in an "L"-shaped plate shape; the "L"-shaped plate surface of the right-angle extension section is coplanar with the plate surface of the fixator main shaft; the arc embracing section is in an arc-shaped plate shape; the arc plate shape of the arc embracing section is perpendicular to the "L"-shaped plate surface of the right-angle extension section; the arc embracing section is arranged on one side of the fixator main shaft to fix the clavicle toothed fixing hook and the acromion arc fixing hook; the "L" of the right-angle extension section The acromioclavicular joint memory fixator provided by the utility model solves the problem of poor stability of acromioclavicular joint fixators after fixation in the prior art and can improve the fixation stability of the acromioclavicular joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention and its features, features, configurations, and advantages will become more apparent upon reading the detailed description of the following non-limiting embodiments with reference to the accompanying drawings. Like reference numerals indicate like parts throughout the drawings. The drawings are not drawn to scale, with emphasis placed on illustrating the subject matter of the present invention.

[0016] Fig. 1 This is a schematic diagram of the overall structure of the acromioclavicular joint memory fixator provided in Example 1 of the present utility model.

[0017] Fig. 2 This is a schematic diagram of the overall structure of the acromioclavicular joint memory fixator provided in Example 1 of the present invention, which has a group of clavicle embracing supports.

[0018] Fig. 3 is the shoulder joint memory fixer provided in embodiment 1 of the utility model has two groups of clavicle embrace support structure schematic view.

[0019] Fig. 4 is the shoulder joint memory fixer provided in embodiment 1 of the utility model has two groups of clavicle embrace support structure schematic view. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Therefore, the detailed description of the embodiments of the utility model provided in the following drawings is not intended to limit the scope of the claimed utility model, but only to represent selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0021] Embodiment 1: in the prior art, the shoulder joint memory fixer is unstable for the fixation of the shoulder joint, in order to solve this problem, in the present embodiment, such as Figs. 1 to 4As shown, it comprises a batten-shaped fixator main shaft 1, several groups of clavicle embracing supports 2, acromion locking supports 3, clavicle tooth-shaped fixing hooks 4 and acromion arc-shaped fixing hooks 5; the clavicle tooth-shaped fixing hooks 4 and the acromion arc-shaped fixing hooks 5 are fixed at the two ends of the batten of the fixator main shaft 1 respectively; the clavicle tooth-shaped fixing hooks 4 and the acromion arc-shaped fixing hooks 5 are curved towards the fixator main shaft 1; the clavicle tooth-shaped fixing hooks 4, the acromion arc-shaped fixing hooks 5 and the fixator 1 main shaft form a "C" shape; the clavicle tooth-shaped fixing hooks 4 can be embedded into the clavicle; the clavicle embracing supports 2 are fixed on the fixator main shaft 1; the clavicle embracing supports 2 comprise two clavicle embracing branches 21; the two clavicle embracing branches 21 are symmetrically arranged on the two sides of the batten of the fixator main shaft 1; the clavicle embracing branch 21 comprises a right-angle extension section 211 and a circular-arc embracing section 212; the two ends of the "L"-shaped right-angle extension section 211 are connected with the middle section of the batten of the fixator main shaft 1 and the end of the circular-arc embracing section 212 respectively; the right-angle extension section 211 is in the shape of an "L"-shaped plate; the plate surface of the "L"-shaped plate of the right-angle extension section 211 is coplanar with the batten surface of the fixator main shaft 1; the circular-arc embracing section 212 is in the shape of a circular-arc plate; the circular-arc plate of the circular-arc embracing section 212 is perpendicular to the plate surface of the "L"-shaped plate of the right-angle extension section 211; the circular-arc embracing section 212 is arranged on the side of the fixator main shaft 1 where the clavicle tooth-shaped fixing hooks 4 and the acromion arc-shaped fixing hooks 5 are fixed; the extension direction of the "L"-shaped right-angle extension section 211 from the fixed end of the fixator main shaft 1 to the right angle is perpendicular to the extension direction of the batten-shaped fixator main shaft 1; the acromion locking support 3 is in the shape of an "L"; one end of the "L"-shaped acromion locking support 3 is connected with the middle section of the batten of the fixator main shaft 1, and the other end is bent towards the direction of the acromion arc-shaped fixing hook; the angle between the extension direction of the "L"-shaped acromion locking support 3 from the connected end of the fixator main shaft 1 to the right angle of the "L" and the extension direction of the fixator main shaft 1 to the acromion arc-shaped fixing hook 5 is 21° to 25°.

[0022] In use, the shoulder lock joint memory fixator provided in the embodiment forms a straight line from the middle line of the horizontal plane of the distal end of the clavicle to the outer edge of the acromion, forms the anatomical axis of the shoulder lock joint, and the fixator main shaft 1 coincides with the anatomical axis; a hole is drilled on the clavicle so that the clavicle tooth-shaped fixing hook 4 is inserted; the acromion arc-shaped fixing hook 5 is hooked into the acromion from the outer edge of the acromion; the clavicle embracing support 2 embraces and fixes the broken bone; the acromion locking support 3 is placed into the proximal end of the acromion obliquely from the outer rear part of the acromion on the basis of the reduction of the shoulder lock joint; and thus the fixation of the shoulder lock joint is realized.

[0023] The fixing mode is different from the contrast document (a shoulder joint dislocation internal fixator disclosed in Chinese patent application No. 97242391.5) in that the embodiment has the clavicular tooth-shaped fixing hook 4 and the acromion arc-shaped fixing hook 5, the structure provided by the embodiment can control the shoulder joint reset gap in the medial-lateral direction or maintain the reset of the distal clavicular fracture by drilling a hole in the clavicular shaft and placing the clavicular tooth-shaped fixing hook 4 in the hole, the acromion arc-shaped fixing hook 5 can be of different specifications according to the body structure of different people, the arc-shaped hook and the sharp barb hook are arranged on the acromion arc-shaped fixing hook 5, so that relative sliding of the acromion arc-shaped fixing hook 5 and the acromion is avoided when the acromion arc-shaped fixing hook 5 is fixed, stress concentration at the outer edge of the acromion is reduced to cause bone defect and bone dissolution, and the external hook in the internal fixator in the contrast document does not need to be bent, so that the clavicular tooth-shaped fixing hook 4 and the acromion arc-shaped fixing hook 5 in the embodiment respectively apply opposite pressure to the clavicle and the acromion to be more stable; the clavicular embracing support 2 in the embodiment is different from the medial fixing claw in the contrast document, the straight-angle extension section 211 of the clavicular embracing support 2 is arranged in parallel to the extension direction of the clavicle, and the clavicle is embraced by the circular arc embracing section 212, so that compared with the connection between the medial fixing claw and the clavicle in the contrast document, the contact area is increased and the pressure on the clavicle is reduced; the acromion locking support 3 in the embodiment is placed in the acromion by drilling a hole in the rear part of the acromion, so that the sliding of the acromion arc-shaped fixing hook and the stress shielding effect are avoided, and the overall structure of the fixator is cooperated to provide horizontal stability for the acromioclavicular joint. The clavicular tooth-shaped fixing hook 4, the acromion arc-shaped fixing hook 5 and the fixator main shaft 1 form a "C" shape, specifically: the fixator main shaft 1 is a straight plate shape, the clavicular tooth-shaped fixing hook 4 and the acromion arc-shaped fixing hook 5 are plate structures with an arc, and are bent and extended in the same side plate surface direction of the straight plate of the fixator main shaft 1 (the straight plate of the fixator main shaft 1 is smoothly connected with the plate of the clavicular tooth-shaped fixing hook 4, and the straight plate of the fixator main shaft 1 is smoothly connected with the plate of the acromion arc-shaped fixing hook 5), the hook end of the clavicular tooth-shaped fixing hook 4 is bent towards the acromion arc-shaped fixing hook 5, and the hook end of the acromion arc-shaped fixing hook 5 is bent towards the clavicular tooth-shaped fixing hook 4.

[0024] The shoulder joint memory fixator provided in the embodiment 1 of the utility model solves the problem of poor fixing stability of the shoulder joint fixator in the prior art, and can improve the fixing stability of the shoulder joint.

[0025] As a preferred scheme, in the embodiment, the clavicular embracing support 2 is a group; the angle between the extension direction of the "L" shape of the acromion locking support 3 and the connecting end of the fixator main shaft 1 to the straight angle of the "L" shape and the extension direction of the fixator main shaft 1 to the acromion arc-shaped fixing hook 5 is 25°.

[0026] As a preferred solution, in the embodiment, the clavicle embracing support 2 is two groups; the angle between the extension direction of the "L" shape of the acromion locking support 3 at the connecting end of the main shaft of the fixator 1 to the right angle of the "L" shape and the extension direction of the main shaft of the fixator 1 to the shoulder peak arc-shaped fixing hook 5 is 21°.

[0027] As a preferred solution, the shoulder joint memory fixator provided by the embodiment is made of nickel-titanium shape memory alloy. Warm water can restore the design shape of the nickel-titanium shape memory alloy. The nickel-titanium shape memory alloy is a memory metal. The use of memory metal can take into account the advantages of rigid fixators and flexible fixators. The use of nickel-titanium shape memory alloy to make joint memory fixators is the prior art which will not be described here.

[0028] In summary, the shoulder joint memory fixator provided by the utility model relates to the technical field of shoulder joint memory fixators and comprises a strip-shaped main shaft of a fixator, a plurality of groups of clavicle embracing supports, an acromion locking support, clavicle tooth-shaped fixing hooks and shoulder peak arc-shaped fixing hooks. The clavicle tooth-shaped fixing hooks and the shoulder peak arc-shaped fixing hooks are fixed at both ends of the strip of the main shaft of the fixator. The clavicle tooth-shaped fixing hooks and the shoulder peak arc-shaped fixing hooks are bent towards the same side of the main shaft of the fixator. The clavicle tooth-shaped fixing hooks, the shoulder peak arc-shaped fixing hooks and the main shaft of the fixator form a "C" shape. The clavicle tooth-shaped fixing hooks can be embedded in the bone tissue of the clavicle. The clavicle embracing supports are fixed on the main shaft of the fixator. The clavicle embracing supports comprise two clavicle embracing branches. The two clavicle embracing branches are symmetrically arranged on both sides of the strip of the main shaft of the fixator. The clavicle embracing branches comprise a right-angled extension section and a circular arc embracing section. The two ends of the "L" shape of the right-angled extension section are connected with the middle section of the strip of the main shaft of the fixator and the end of the circular arc embracing section, respectively. The right-angled extension section is in the shape of an "L" plate. The plate surface of the "L" plate of the right-angled extension section is coplanar with the plate surface of the strip of the main shaft of the fixator. The circular arc embracing section is in the shape of a circular arc plate. The circular arc plate of the circular arc embracing section is perpendicular to the plate surface of the "L" plate of the right-angled extension section. The circular arc embracing section is arranged on the side of the main shaft of the fixator on which the clavicle tooth-shaped fixing hooks and the shoulder peak arc-shaped fixing hooks are fixed. The extension direction of the "L" shape of the right-angled extension section from the fixing end of the main shaft of the fixator to the right angle of the "L" shape is perpendicular to the extension direction of the strip-shaped main shaft of the fixator. The acromion locking support is in the shape of an "L". One end of the "L" shape of the acromion locking support is connected with the middle section of the strip of the main shaft of the fixator. The angle between the extension direction of the "L" shape of the acromion locking support at the connecting end of the main shaft of the fixator to the right angle of the "L" shape and the extension direction of the main shaft of the fixator to the shoulder peak arc-shaped fixing hook is 21° to 25°. The shoulder joint memory fixator provided by the utility model solves the problem of poor stability of the shoulder joint fixator in the prior art and can improve the stability of the fixation of the shoulder joint.

[0029] The above merely describes preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation or direct or indirect application in other related technical fields based on the content of the present application specification and drawings is also included in the patent protection scope of the present application.

Claims

1. A shoulder joint memory fixator, characterized by, The fixing device comprises a board-shaped fixing device main shaft, several groups of clavicle embracing supports, a shoulder peak locking support, a clavicle tooth-shaped fixing hook and a shoulder peak arc-shaped fixing hook. The clavicle tooth-shaped fixing hook and the shoulder peak arc-shaped fixing hook are respectively fixed at the two ends of the board of the fixing device main shaft. The clavicle tooth-shaped fixing hook and the shoulder peak arc-shaped fixing hook are both curved towards the fixing device main shaft; the clavicle tooth-shaped fixing hook, the shoulder peak arc-shaped fixing hook and the fixing device main shaft form a "C" shape. The clavicle tooth-shaped fixing hook can be embedded into the bone of the clavicle. The clavicle embracing support is fixed on the fixing device main shaft; the clavicle embracing support comprises two clavicle embracing branches. The two clavicle embracing branches are symmetrically arranged at the two sides of the board of the fixing device main shaft. The clavicle embracing branch comprises a right-angle extension section and a circular arc embracing section; the two ends of the "L" shape of the right-angle extension section are respectively connected with the middle section of the board of the fixing device main shaft and the end of the circular arc embracing section. The right-angle extension section is in the shape of an "L" plate; the plate surface of the "L" plate of the right-angle extension section is coplanar with the plate surface of the board of the fixing device main shaft. The circular arc embracing section is in the shape of a circular arc plate; the circular arc plate of the circular arc embracing section is perpendicular to the plate surface of the "L" plate of the right-angle extension section; the circular arc embracing section is arranged at the side of the fixing device main shaft where the clavicle tooth-shaped fixing hook and the shoulder peak arc-shaped fixing hook are fixed. The extension direction of the "L" shape of the right-angle extension section from the fixing end of the fixing device main shaft to the right angle is perpendicular to the extension direction of the board-shaped fixing device main shaft. The shoulder peak locking support is in the shape of an "L"; one end of the "L" shape of the shoulder peak locking support is connected with the middle section of the board of the fixing device main shaft, and the other end is bent towards the direction of the shoulder peak arc-shaped fixing hook; the angle between the extension direction of the "L" shape of the shoulder peak locking support from the connecting end of the fixing device main shaft to the right angle and the extension direction of the fixing device main shaft to the shoulder peak arc-shaped fixing hook is 21° to 25°.

2. The acromioclavicular joint memory fixator of claim 1, wherein The clavicle embracing support is one group. The angle between the extension direction of the "L" shape of the shoulder peak locking support from the connecting end of the fixing device main shaft to the right angle and the extension direction of the fixing device main shaft to the shoulder peak arc-shaped fixing hook is 25°.

3. The acromioclavicular joint memory fixator of claim 1, wherein The clavicle embracing support is two groups. The angle between the extension direction of the "L" shape of the shoulder peak locking support from the connecting end of the fixing device main shaft to the right angle and the extension direction of the fixing device main shaft to the shoulder peak arc-shaped fixing hook is 21°.

4. The acromioclavicular joint memory fixator of any one of claims 1 to 3, wherein, The fixing device is made of nickel-titanium shape memory alloy.

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