Thigh-bone positioning method for full knee-joint replacement operation by robot

A total knee replacement and robotic technology, applied in the field of robotic total knee replacement surgery, can solve the problems of difficult femur positioning and fast re-matching, and achieve the effect of reducing surgical costs, complexity, and pain for patients
CN1488321AInactive Publication Date: 2004-04-14SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI JIAO TONG UNIV
Publication Date
2004-04-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a thighbone positioning method of robot full-knee joint replacement. First, abstract the problem to determine the center of thighbone into a geometric model to find the sphere center according to the known point on the sphere, combine three arbitrary points according to the collected spacing-socket central data of the thighbone, determine the coordinate information of the thighbone center by numerical calculation, then build the thighbone reference frame, then make the vectors on coordinate axes of three thighbone reference frame in the robot reference frame and ones on three coordinate axes of the robot reference frame compose a one-to-one relationship, and thus, find and build the corresponding relationship of the robot and thighbone reference frames, which accurately positions the thighbone.
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Description

Technical field:

[0001] The invention relates to a femur positioning method for robotic total knee joint replacement, which is used for robotic total knee replacement without CT. It belongs to the field of advanced manufacturing and automation (medicine). Background technique:

[0002] In our country, thousands of patients with severe arthritis need total knee replacement every year. Artificial knee replacement is a typical orthopedic prosthesis implantation operation. The key operations are five directional cuts to the patient's femur and longitudinal opening of the tibia. The placement position of the prosthesis, the accuracy of cutting and opening are all directly related to the quality of the operation. The position of the prosthesis and the sawing and cutting of the femur and tibia in artificial knee replacement are all controlled by the doctor based on experience. The special positioning template can only provide a certain degree of accuracy guarantee, and the human...

Claims

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