Navigation method and system for hip and knee joint replacement

Abstract

The invention relates to the technical field of medical treatment, and discloses a navigation method and system for hip and knee joint replacement. The method comprises the following steps: acquiringa CT image; performing leg bone segmentation and reconstruction according to the CT image to obtain a leg bone model in model space; based on a leg bone marker, performing spatial pose registration onthe leg bone model and a real leg bone, and establishing a mapping relationship of the leg bone in the model space and the real space; tracking the leg bone marker; updating the real-time pose of theleg bone model; based on a cutting seam marker, performing spatial pose registration on a osteotomy guide block cutting seam model and the osteotomy guide block cutting seam, and establishing a mapping relationship of the osteotomy guide block cutting seam in the model space and the real space; tracking the cutting seam marker; updating the real-time pose of the osteotomy guide block cutting seammodel; and displaying the real-time poses of the osteotomy guide block cutting seam model and the leg bone model. The method improves the positioning accuracy.

Description

technical field [0001] The invention relates to the field of medical technology, in particular to a navigation method and system for hip and knee replacement surgery. Background technique [0002] Artificial hip and knee arthroplasty is currently the most effective means of treating end-stage disease of the hip and knee joint. my country has gradually entered an aging society, and the amount of artificial hip and knee replacements is increasing at a rate of 25%-30% per year, leaving a huge gap in the market for joint replacement surgery. However, in clinical practice, conventional hip and knee arthroplasty usually requires preoperative X-ray and CT imaging examinations and intraoperative mechanical guides for osteotomy positioning, which relies heavily on the experience of the surgeon, and the reliability and accuracy of positioning are insufficient, which is likely to cause Complications shorten the service life of the prosthesis and become an important factor restricting ...

AI Technical Summary

Problems solved by technology

However, in clinical practice, conventional hip and knee arthroplasty usually requires preoperative X-ray and CT imaging examinations and intraoperative mechanical guides for osteotomy positioning, which relies heavily on the experience of the surgeon, and the reliability and accuracy of positioning are insufficient, which is likely to cause Complications shorten the service life of the prosthesis and become an important factor restricting the effect of surgery

Images