Auxiliary positioning method, positioning device and system for joint replacement

Abstract

The embodiment of the invention provides auxiliary positioning method, positioning device and system for joint replacement. The method comprises the following steps: acquiring the mapping relation between a three-dimensional model coordinate system of a joint and a visual space coordinate system of the positioning device; acquiring the pose of the joint site in the visual space coordinate system,and acquiring the pose of the tail end of a surgical instrument in the visual space coordinate system; based on the mapping relation, converting the poses of the tail end of the surgical instrument and the joint site in the visual space coordinate system into the three-dimensional model coordinate system; and displaying the joint site and the tail end of the surgical instrument in a virtual imageof the three-dimensional model coordinate system, thereby performing surgery auxiliary positioning based on the display result of the virtual image. Because a doctor can visually observe the relativeposition relation between the joint site and the tail end of the surgical instrument during surgical operation, the osteotomy accuracy is high, operating risk is decreased, and further the accuracy and matching degree of the mounting position of a prosthesis are improved.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an auxiliary positioning method, positioning device and system for joint replacement surgery. Background technique [0002] Osteoarthritis of the knee is a joint disease that gradually worsens with age. It is mainly caused by aging and long-term overuse of the knee joint. The cartilage on the knee joint is worn away, resulting in less lubricating fluid in the knee joint capsule and chronic inflammation of the joint tissue. , gradually appear acid, swelling, numbness, joint stiffness. According to statistics, 80% of people over 60 years old in China suffer from degenerative arthritis, and some people suffer from joint bending and deformation for many years. [0003] In the face of the above-mentioned joint diseases, at present, it is mainly solved by traditional total artificial knee replacement surgery. During the operation, the bad bone is mainly removed manually by the doctor b...

AI Technical Summary

Problems solved by technology

During the operation, the bad bone is mainly removed manually by the doctor based on his experience. The doctor cannot accurately observe the relative posture of the surgical instrument and the surgical joint, and it is inevitable to remove good and bad bones, and even healthy soft tissues such as the cross Ligaments, etc. cannot be preserved, so patients need to bear the trauma caused by large wounds, and a long recovery time of up to 1 to 2 years

[0004] The current position determination method for joint surgery has low osteotomy accuracy and the risk of cortical bone penetration. As a result, the accuracy and matching of the prosthesis installation position are poor, and the recovery of the postoperative force line is also difficult to approach the physiological state.

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