Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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

Inactive Publication Date: 2004-04-14
SHANGHAI JIAO TONG UNIV
View PDF0 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies and shortcomings of the prior art and propose a new femur positioning method for robotic total knee arthroplasty to solve the problems of difficult femur positioning and fast re-matching in robotic total knee arthroplasty

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Thigh-bone positioning method for full knee-joint replacement operation by robot
  • Thigh-bone positioning method for full knee-joint replacement operation by robot
  • Thigh-bone positioning method for full knee-joint replacement operation by robot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] In order to better understand the technical solutions of the present invention, a further detailed description will be made below in conjunction with the accompanying drawings and embodiments.

[0022] 1. When determining the center of the femoral head, the upper body and the other lower limb of the patient should be fixed, and the distal femur is partially exposed. Change the position of the distal femur to obtain the coordinate information of the center point of the intercondylar fossa at different positions, such as figure 1 A, B, C, and D in A, B, C, and D; take three space points, such as A, B, and C, to form a triangle, and find out O 1 And the straight line l perpendicular to the plane of the triangle 1 , and then use different combinations of three points, such as A, B, D, to find another straight line l passing through the circumcenter vertical triangle plane 2 . If there are 8 center point data of the intercondylar fossa collected, then a total of ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): A61B17/56A61B90/10
Inventor 罗毅刘宏建刘允才
Owner SHANGHAI JIAO TONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com