Method for determining biological force line of lower limbs in three dimensional space

Abstract

The invention discloses a method for determining the biological force line of lower limbs in a three dimensional space. A caput femoris central point, a knee joint central point and an ankle joint central point are determined respectively in the three dimensional space, the caput femoris central point is used for three-dimensional reconstruction of the lower limbs of the human body, perfusion is conducted on collum femoris, caput femoris and greater trochanter after three-dimensional reconstruction, and then the geometric center of a perfusion body is found through Mimics or 3D Slicer; the knee joint central point adopts the center of a knee joint non-bony space perfusion body; the ankle joint central point adopts the center of an ankle joint non-bony space perfusion body. The method avoids the defects that in the prior art, the measurement result, obtained by visual inspection, protractor measurement and body X-ray measurement on a two-dimensional platform, of the force line of the lower limbs is greatly affected by interference, data has no standard and the subjectivity is high; the accuracy of the method is higher, and the method is more in line with the measurement of the forceline of the lower limbs.

Description

technical field [0001] The invention relates to the field of medical technology, in particular to a method for determining biological force lines of lower limbs in three-dimensional space. 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 ...

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. How to improve the accuracy of knee replacement and accurately establish the biological force line of the lower limbs is the focus of research by those skilled in the art.

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