Self-locking acetabular posterior-wall posterior-column anatomical steel plate

Abstract

The invention discloses a self-locking acetabular posterior-wall posterior-column anatomical steel plate which comprises a steel plate body, a self-locking bolt and an auxiliary sleeve pipe, wherein the auxiliary sleeve pipe is used for controlling the installation of the steel plate body, and a locking-hole internal thread is respectively manufactured at the tops of a first self-locking hole, a second self-locking hole and a third self-locking hole; an external thread is respectively manufactured on the self-locking bolt and the auxiliary sleeve pipe, and the external thread can be in corresponding spinning fit with the locking-hole internal thread; the design per se permits appropriate torsion and bending in a three-dimensional space, is convenient for molding so as to be better fitted with individualized bones and is used for bearing the moving loads of joints, so that fractures are normally healed, and complications, such as fracture later-looseness, shift, pains, bone stress shielding and the like are reduced; the success ratio of fracture internal fixation operations is improved, the molding in the operations is avoided, the blood loss in the operations is reduced, the anesthetic time is reduced, the infected chances are reduced, and the operative risk is lowered; and the interference of built-in materials for sciatic nerves in the internal fixation of the operations is reduced.

Description

technical field [0001] The invention relates to the technical field of acetabular treatment equipment, in particular to a self-locking acetabular posterior wall and post anatomical steel plate. Background technique [0002] With the development of our society, the number of high-energy severe acetabular fractures caused by traffic accidents, construction industry and industrial injuries is increasing day by day. The disability rate of traditional conservative treatment is as high as 50% to 60%. Patients have many complications, such as: Low back pain, hip arthritis joint pain, gluteal sacral pain, abnormal gait, neurological sequelae, and even loss of working ability. If these diseases are not handled properly, it will not only prolong the treatment time, but also bring mental trauma and economic losses to the patients, seriously affect the quality of life and work of the patients, and even cause disastrous consequences; it will also increase the social medical and economic ...

AI Technical Summary

Problems solved by technology

However, with the widespread application of surgical treatment of acetabular fractures, related problems have gradually come to light: 1. Surgery-related complications are gradually increasing, such as excessive intraoperative blood loss, excessive surgical trauma, failure of implant fracture, and nonunion of acetabular fractures , Fracture malunion, myositis ossificans, loss of joint function and even encountering medical complaints from patients, etc., have attracted more and more attention from orthopedic surgeons; 2. The in-depth concept of minimally invasive and minimally invasive surgery in contemporary orthopedics requires Bringing maximum clinical efficacy with minimal surgical trauma

This is also the international development trend of all surgical operating techniques; 3. The cost of implant materials for patients accounts for about 45% to 52% of the total hospitalization expenses, and the cost of imported materials is expensive; 4. The pelvis currently used at home and abroad And the acetabular titanium alloy and stainless steel plate, including the memory alloy internal fixation system, have a disadvantage: they do not conform to the biomechanical transmission system of the pelvis and acetabulum, that is, the intraosseous mechanical route

3. The wire screw binding method is rarely used clinically due to its poor biomechanical stability.

4. The memory alloy device has the disadvantages of more soft tissue stripping and local blood supply damage during the operation; more staples, clamping nails, etc. are required; and the memory alloy device has a weak reset effect on hip joint fractures , the immediate stability is weaker than the reconstruction steel plate; once it needs to be taken out, it is more difficult

[0006] At present, the first two methods are the most commonly used, and these two methods still have the following disadvantages: 1. The shaping process of the steel plate prolongs the operation time, increases the amount of surgical blood loss, prolongs the exposure time of the incision, prolongs the anesthesia time, and increases the amount of anesthesia. Potential risks and complications of surgery increase; 2. 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; 3 1. Improper shaping of the steel plate and disobedience of the bone, leading to loosening and displacement of the fracture site, 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 invention patent "Anatomical Acetabular Posterior Wall and Posterior Column Plate" (Notice No. CN201211223Y) whose patent number is ZL200820120116.9; including the main body, the main body is narrow at both ends and wide in the middle Strip-type steel plate, which includes an upper screw hole area, a middle screw hole area and a lower screw hole area, and upper positioning holes are respectively opened between the upper screw hole area and the middle screw hole area and between the middle screw hole area and the lower screw hole area And the lower positioning hole, the left and right sides of the main body are bent inward, and the plate surface in the middle screw hole area is bent 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 a smooth transition of three curves Serpentine curve; although this design can solve the problem of reshaping due to individual differences in different patients, it is still difficult to operate without auxiliary equipment when installing the steel plate; moreover, the anti-slip performance of the screw-in end is poor, and there are still problems during the operation. Security risks

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