Virtual Implant Placement for Joint Kinematics
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current surgical methods for joint resection lack precision in determining optimal resection planes, particularly in achieving soft tissue balance and accommodating individual joint kinematics, which can impact the functional outcome of joint replacement procedures.
Innovation Solution
A virtual implant placement system that uses tracking assemblies on bones to generate position data, coupled with a processing device to determine optimal cut planes based on joint kinematics and motion constraints, allowing for intraoperative resection and implant sizing adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional resection guides are used to guide bone cutting, then the surgical procedure can be performed, but the precision in determining optimal resection planes is insufficient
Solution Approach 1:
The patent creates a virtual copy of the patient's joint anatomy through 3D imaging and computational modeling. This virtual model allows precise determination of resection planes by simulating implant placement and joint kinematics before actual surgery, enabling accurate transfer of measurement data to physical cut guides.
Solution Approach 2:
The patent replaces traditional mechanical measurement methods with a computer-based system that uses 3D imaging, virtual modeling, and computational algorithms to determine optimal resection planes. This substitution of mechanical systems with digital computation significantly improves measurement and cutting precision.
2Adaptability or versatility
If standard resection guides are used, then the procedure can be completed, but soft tissue balance and individual joint kinematics cannot be optimized
Solution Approach 1:
The patent applies local quality by customizing the resection plan to match the specific kinematic characteristics and anatomical features of each patient's joint. The virtual modeling system allows optimization of resection planes based on individual soft tissue balance requirements and joint motion patterns, rather than using universal guidelines.
Solution Approach 2:
The patent incorporates dynamic analysis of joint kinematics by simulating joint motion through various ranges of movement in the virtual model. This allows determination of resection planes that optimize soft tissue balance and joint function throughout the full range of motion, improving functional outcomes.
3Measurement precision
If virtual implant placement system is implemented, then precision of resection plane determination is improved, but device complexity increases
Solution Approach 1:
The patent employs a universal computer-based platform that integrates multiple functions including 3D imaging acquisition, virtual joint modeling, kinematic analysis, and resection plane determination. This multi-functional system reduces overall complexity by consolidating what would otherwise require multiple separate devices and procedures.
Data Source
AI summary
A virtual implant placement method and system comprising models of implants and/or bones linked to tracking assemblies mounted onto the bones. A joint model is constructed intraoperatively based on the positions of the tracking assemblies to determine the positions of cut planes.