Tibial Prosthesis Implantation Using Local Bone Density
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Solution Overview
Problem
Existing methods for implanting tibial prostheses do not effectively account for variations in bone density across different portions of the proximal tibia, leading to uneven resistance and potential instability during implantation.
Innovation Solution
A method that determines the bone density of specific areas of the tibia using bone density gauges or imaging modalities, allowing for tailored bone removal and selection of appropriate tibial components with corresponding fixation structures to achieve equivalent resistance across all portions of the tibia.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If uniform bone removal is performed across all portions of the proximal tibia, then the implantation process is simplified, but uneven resistance and potential instability occur during implantation due to varying bone density
Solution Approach 1:
The patent applies local quality by differentiating bone removal procedures based on local bone density characteristics. Different portions of the proximal tibia (medial, lateral, anterior, posterior) are assessed individually using bone density gauges, and bone removal is customized for each region to achieve uniform resistance across the implantation interface, thereby resolving the contradiction between procedural simplicity and implantation stability
2Reliability
If bone density measurement and customized bone removal are performed for each portion of the tibia, then uniform resistance and stable implantation are achieved, but the complexity of the implantation process increases
Solution Approach 1:
The patent segments the proximal tibia into distinct portions (medial, lateral, anterior, posterior) for individual bone density assessment and customized bone removal. This segmentation allows systematic management of complexity by treating each region separately with standardized assessment protocols, achieving uniform resistance while organizing the complex procedure into manageable segments
3Manufacturing precision
If excessive bone removal is performed to ensure fit in denser bone areas, then the prosthesis fits well in high-density regions, but bone loss increases and potential instability occurs in lower density areas
Solution Approach 1:
The patent prevents excessive bone loss by applying local quality principles - each portion of the tibia receives bone removal tailored to its specific density characteristics. Bone density gauges guide the extent of bone removal in each region, ensuring adequate fit in high-density areas without over-removal that would compromise low-density areas, thereby optimizing prosthesis fit while minimizing total bone loss
Data Source
AI summary
A method of implanting a prosthesis based on bone density of a bone is provided. A first bone density of the bone may be determined at a first portion of the bone. A second bone density of the bone may be determined at a second portion of the bone. A first desired amount of bone removal may be determined at the first portion of the bone based on the first bone density. A second desired amount of bone removal may be determined at the second portion of the bone based on the second bone density. The desired amounts of bone may be removed from the first and second portions of the bone. A prosthesis may be selected and implanted.