Determining method of ankle joint center point

Abstract

The invention discloses a determining method of an ankle joint center point. The method comprises the steps that CT imaging and three-dimensional reconstruction are conducted on lower limps of a humanbody; perfusion of ankle joint space after three-dimensional reconstruction is performed is conducted by using 3D modeling software; a center point of a perfused body, which is the center point of anankle joint is found. According to the method, the ankle joint center point is determined in three-dimensional space, and compared with the ankle joint center point positioned by two-dimensional dataobtained by measuring of imaging data of X-ray, CT, MRI and the like and cadavers, the accuracy of the method is higher; fibulae are included by traditional methods for determining the ankle joint center point, but only one fourth of lower limb stress is borne by the fibulae to the most, the stress is mainly borne by tibias, so that the method more focuses on the core stress zone to perform measurement on the ankle joint center point, which is more conform to measurement of force lines of the lower limbs.

Description

technical field [0001] The invention relates to the field of medical technology, in particular to a method for determining the central point of an ankle joint. Background technique [0002] In the field of medical technology, it is often necessary to understand the determination of geometric parameters such as limb position and angle deflection, and to study the biological characteristics of limbs by controlling certain geometric parameters. For example, in total knee arthroplasty (Total Knee Arthroplasty, TKA) surgery, osteotomy surgery and patellar dislocation surgery, in order to achieve good clinical long-term results, the selection of indications, the selection of prostheses, the precise mastery of surgical techniques and Pre-operative management is very important, especially the requirements for surgical skills to a large extent, not only accurate osteotomy in three-dimensional space, three-dimensional placement of prostheses, but also the re-replication of biomechanic...

AI Technical Summary

Problems solved by technology

This kind of positioning and alignment based on the observation of the limbs and prosthesis with the naked eye is very subjective, which directly affects the reliability of the positioning method and the accuracy of the operation, and even leads to the failure of the operation.

Although people continue to improve the mechanical positioning system to improve the accuracy of prosthetic implantation, the inherent limitations of the system itself determine its possible accuracy. It has been reported in the literature that even the most sophisticated mechanical positioning system is used by experienced doctors. The incidence of misalignment with the tibia more than 3° is also at least 10%

Moreover, the mechanical positioning measurement system is based on the hypothetical standardized femoral anatomy and geometry, which may not be suitable for some specific cases

Therefore, the accuracy of traditional surgical methods is the main problem that plagues surgeons

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