Degradable proximal tibia posterior-lateral locking internal fixation apparatus with development functions

Abstract

The invention discloses a degradable proximal tibia posterior-lateral locking internal fixation apparatus with development functions. The degradable proximal tibia posterior-lateral locking internal fixation apparatus is made of degradable biological materials with development functions. The degradable biological materials comprise biodegradable materials and developers. The degradable proximal tibia posterior-lateral locking internal fixation apparatus comprises a top, a waist and a body which are integrally formed. The degradable proximal tibia posterior-lateral locking internal fixation apparatus is matched with space geometric shapes of proximal tibia posterior-lateral contact surfaces. A plurality of first locking screw holes are formed in the top, a plurality of second locking screw holes are formed in the body, and angles of 75-100 degrees are formed by the first locking screw holes in certain directions and a plane of the top of the degradable proximal tibia posterior-lateral locking internal fixation apparatus, so that screws can avoid proximal tibia posterior-lateral articular surfaces after being implanted. The degradable proximal tibia posterior-lateral locking internal fixation apparatus has the advantages that the degradable proximal tibia posterior-lateral locking internal fixation apparatus can excellently cling to bone surfaces, accordingly, the problem of possible local stress concentration due to that fact that an existing internal fixation apparatus poorly clings to bone surfaces can be solved, fixation effects of the degradable proximal tibia posterior-lateral locking internal fixation apparatus can be effectively improved, and the degradable proximal tibia posterior-lateral locking internal fixation apparatus is favorable for fixing fracture bone blocks; the degradable proximal tibia posterior-lateral locking internal fixation apparatus does not need to be taken out by means of second surgery, internal fixation apparatus absorption procedures can be dynamically monitored, and accordingly the degradable proximal tibia posterior-lateral locking internal fixation apparatus is favorable for guiding functional exercise.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a degradable and developable rear lateral locking internal fixation device for the proximal end of the tibia. Background technique [0002] With the improvement of socio-economic level and the rapid development of transportation, tibial plateau fractures caused by high-energy injuries are increasing day by day. Clinically, the treatment of such load-bearing intra-articular fractures is relatively complicated, among which the treatment of posterolateral fractures of the proximal end of the tibia is particularly difficult, and it is prone to fracture redisplacement, nonunion, internal fixation failure, and joint function due to improper selection of fracture fixation methods. Movement disorders and other complications. Due to the irregular anatomical contour behind the platform and the large curvature of the transition zone of the metaphysis, there is no intern...

AI Technical Summary

Problems solved by technology

Metal internal fixation has the following disadvantages: (1) Electrolytic corrosion in the body, and some metal particles are produced to affect the surrounding normal tissue; (2) Too rigid, easy to produce stress shielding, and easy to fracture again after the internal fixation is removed; (3) Blocking X-ray penetration interferes with nuclear magnetic resonance imaging, which is not conducive to postoperative observation; (4) At present, many patients in China require the internal fixation to be removed after the fracture heals, which requires a second operation, which increases the chance of various complications such as infection , increased the economic burden of the patient, and brought the pain of reoperation to the patient

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