Patient-Adapted Hip Implants via Preoperative Digital Planning
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Solution Overview
Problem
Traditional off-the-shelf hip joint implants often mismatch a patient's biological features, leading to complications such as pain, discomfort, and increased risk of implant failure due to the need for excessive bone removal during surgery.
Innovation Solution
A patient-adapted acetabular implant system is developed, utilizing image data to create customized features like locking mechanisms, screw holes, and radii, and surgical tools with 3D guidance to optimize bone cuts and implant design for a precise anatomical fit, minimizing bone removal and enhancing surgical precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If standard off-the-shelf implants are used, then manufacturing cost and availability are improved, but anatomical mismatch and implant failure risk increase
Solution Approach 1:
Patient-specific planning and customization are performed before surgery using preoperative imaging (CT/MRI) to create a digital model of the patient's anatomy. This allows the implant design to be tailored to the patient's specific bone geometry and joint alignment requirements, ensuring optimal anatomical match while avoiding intraoperative bone removal and positioning errors that could lead to implant failure.
Solution Approach 2:
The implant design incorporates patient-specific anatomical features at critical locations such as the acetabular cup orientation, femoral stem geometry, and bone contact surfaces. By customizing only the necessary anatomical parameters based on preoperative data rather than creating entirely custom implants, the solution achieves local quality matching where it matters most while maintaining cost-effectiveness.
2Ease of operation
If excessive bone removal is performed to accommodate standard implants, then implant installation is facilitated, but bone stock loss and surgical complications increase
Solution Approach 1:
Preoperative imaging and digital planning allow precise determination of the required bone resection amount and location before surgery. The patient-specific implant design is based on the pre-planned bone cuts, ensuring that only the minimum necessary bone is removed to accommodate the implant, thereby preserving bone stock while facilitating smooth implant installation.
Solution Approach 2:
The patent replaces traditional trial-and-error mechanical fitting during surgery with computer-aided design and digital simulation. The implant geometry is virtually tested against the patient's anatomy in advance, allowing optimization of bone resection parameters and implant positioning without requiring excessive bone removal during the actual surgical procedure.
3Manufacturing precision
If patient-adapted implants with customized features are created, then anatomical precision and implant longevity are improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patient-specific implant is created by modifying key anatomical parameters (such as acetabular cup angle, femoral stem curvature, and bone contact surface geometry) based on the patient's preoperative imaging data. This approach maintains the overall modular structure and manufacturing processes of standard implants while customizing only the critical dimensional parameters, thereby achieving high anatomical precision without excessive manufacturing complexity.
Solution Approach 2:
Customization is applied selectively to specific regions and parameters of the implant that directly affect anatomical matching and surgical outcomes, such as the acetabular component orientation and femoral stem geometry. Other non-critical portions of the implant can be produced using standardized components, reducing overall manufacturing complexity while maintaining precision where it matters most.
4Device complexity
If traditional surgical procedures are used, then surgical protocol simplicity is maintained, but surgical time and complication rate increase
Solution Approach 1:
All complex planning, measurement, and implant design work is completed before surgery using preoperative imaging and computer simulation. The surgical team receives a detailed preoperative plan including exact implant sizes, positions, and orientation parameters. During surgery, this translates to straightforward execution of pre-determined steps, reducing surgical time and eliminating intraoperative decision-making delays while maintaining protocol simplicity.
Solution Approach 2:
The patent replaces complex intraoperative measurement and trial-fitting procedures with preoperative digital planning and navigation systems. This substitution reduces the time required for surgical steps such as determining implant orientation and positioning, while the standardized surgical workflow based on pre-planned parameters maintains procedural simplicity for the surgical team.
Data Source
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AI summary
Implants, trial implants, and systems for treatment of a hip-joint of a patient are disclosed, as well as methods of making and using such implants, trial implants, and systems. Various embodiments include patient-adapted acetabular implants and/or trial implants.