Implantation angle collimator for acetabulum prostheses

Abstract

The invention relates to an implantation angle collimator for acetabulum prostheses, which comprise a right angle trapezoid body with an acute angle of alpha, a first bevel protractor with an included angle of beta, a second bevel protractor with an included angle of gamma, a gradienter and a guide rod. The alpha is larger than 75 degrees and smaller than 80 degrees, the beta is larger than 40 degrees and smaller than 45 degrees, and the beta plus the gamma is equal to 90 degrees. An inclined waist face of the right angle trapezoid body is arranged at the top, a right angle face opposite to the inclined waist face is positioned at the bottom, another two right angle faces are positioned on the left side and the right side, the gradienter is positioned on the inclined waist face, the bottom of the right angle trapezoid body is arranged on the guide rod, slide grooves are respectively arranged on the front lateral side and the rear lateral side of the right angle trapezoid body, and one sides of the first bevel protractor and the second bevel protractor are positioned in the slide grooves on the front lateral side and the rear lateral side and can move along the slide grooves. The implantation angle collimator resolves the problems that an operator is low in implantation location accuracy and large in error relying on experience and according to topography signs. The implantation angle collimator is simple in operation, economic and practical, widely applied to the medical field and capable of meeting clinical requirements well.

Description

technical field [0001] The invention relates to an orthopedic surgery instrument, in particular to an acetabular prosthesis implantation angle collimator. Background technique [0002] The hip joint is one of the largest and most stable joints in the human body, and it is a typical ball-and-socket joint. The hip joint has both good intrinsic stability and flexible mobility. At present, with the development of orthopedics, materials science, anesthesiology and other related disciplines, total hip arthroplasty (THA) has become the standard treatment method for many hip joint diseases and has proved to have excellent long-term efficacy. Studies have shown that the success of total hip replacement is closely related to the angle of acetabular implantation. Abnormal placement of acetabular components portends complications such as hip pain, hip dislocation or subluxation, hip instability, accelerated polyethylene liner wear, and component loosening. Therefore, it is an importa...

AI Technical Summary

Problems solved by technology

Although implantation under navigation can accurately implant the prosthesis, it must also be recognized that implantation under navigation has disadvantages: expensive, complicated operation, highly professional, and incorrect navigation information will increase the cost of surgery. risk, and even lead to surgical failure; currently, the implanted system under navigation is relatively expensive, and only a few hospitals in China are equipped with it

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