Universal posterior locking anatomic bone fracture plate for acetabulum

Abstract

The invention discloses a universal posterior locking anatomic bone fracture plate for acetabulum. The universal posterior locking anatomic bone fracture plate comprises a right bone fracture plate, bolts and a guide sleeve, wherein the mirror structure of the right bone fracture plate is a left bone fracture plate. The right bone fracture plate is reversed at 0-9 degrees clockwise along the medial axis. The medial axis profile of the right bone fracture plate is an arc-shaped plane in smooth transition. The right bone fracture plate is sequentially divided into a first locking block, a first positioning block, a second locking block, a second positioning block and a third locking block from top to bottom and is provided with a first locking unit hole, a second locking unit hole and a third locking unit hole which form included angles with the surface of the right bone fracture plate at 0-25 degrees. The locking holes are provided with internal threads of the locking holes. The bolts and the guide sleeve are provided with adaptive internal threads. The universal posterior locking anatomic bone fracture plate disclosed by the invention has the advantages that the universal posterior locking anatomic bone fracture plate is optimal in structure, good in universality, good in structural stability, accordant with biomechanical characteristics, good in adhesion on the surface of acetabulum, efficient to use and low in surgical risk.

Description

technical field [0001] The invention relates to the technical field of acetabular fracture treatment equipment, in particular to a general-purpose rear acetabular locking anatomical bone plate, especially used in the treatment of acetabular fractures, acetabular rear (posterior column / posterior wall) fractures, acetabular medial Fractures of the quadrilateral area or acetabular roof require the placement of internal fixators through the posterior acetabular approach, which is also suitable for cases of posterior and medial acetabular bone defects in hip replacement surgery. Background technique [0002] With the continuous improvement of open reduction and internal fixation techniques and the improvement of built-in materials, surgical treatment of acetabular fractures has become more and more widely accepted by patients. Anatomical reduction and firm fixation are the key points in the treatment of displaced and unstable acetabular fractures. , but the existing problems main...

AI Technical Summary

Problems solved by technology

However, there is a shortcoming of the currently used steel plate: it does not conform to the biomechanical transmission system of the pelvis and acetabulum (that is, the mechanical conduction route of the bone), and does not conform to the surface shape of the acetabulum. During the operation, manual shaping is required according to the bone shape characteristics of each patient. shape, which prolongs the operation time, increases anesthesia medication, and increases surgical bleeding, resulting in an increase in various potential risks.

(3) The binding method of steel wire and needle screw has poor biomechanical stability and is rarely used now.

[0006] The most commonly used methods are the first two methods, and their disadvantages are: first, the steel plate shaping process prolongs the operation time, increases the amount of surgical blood loss, prolongs the exposure time of the incision, prolongs the anesthesia time, increases the amount of anesthesia, and the potential risks and complications of the operation increase

Second, repeated shaping and bending of the steel plate will leave nicks or scratches on the surface of the steel plate, which will increase the internal stress concentration points of the steel plate and increase the risk of fatigue fracture of the implant

Third, the bad shape of the steel plate and the incongruity of the bone lead to loosening and displacement of the fracture, causing pain and stress shielding of the bone, and increasing the risk of poor fracture union or malunion

[0007] Therefore, the correct selection of implants is extremely important. According to the individual differences of each patient, the selection of implants with appropriate size, shape and design can increase the success rate of fracture internal fixation. Correct selection of implants can help reduce the risk of surgery. Risk, in the prior art, such as the Chinese utility model patent "A kind of anatomical acetabular posterior wall posterior column steel plate" (announcement number is CN201211223Y) that the patent number is 200820120116.9; A shaped steel plate, which includes an upper screw hole area, a middle screw hole area, and a lower screw hole area, with upper positioning holes and For the lower positioning hole, the left and right sides of the main body are bent inward, and the plate surface in the screw hole area in the middle is curved to the left or right to form an arc-shaped plate surface, and the longitudinal section of the central axis of the main body is an arc with a smooth transition of three curves Although this design can solve the problem of reshaping due to individual differences in different patients, the existing bone plate cannot effectively fix the fractures of the acetabular roof and quadrilateral region of the acetabulum, and it is only suitable for fixing the posterior column of the acetabulum or the posterior Fracture of the wall, therefore, its structure needs to be further improved

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