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Updated: Aug 5, 2026
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Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
Published on: April 11, 2018
Anatomical fit of the oneKNEE tibia design using statistical shape modeling
Ingrid Dupraz1, Yukihide Minoda2, Nikolai Kornilov3
1Research and Development, Aesculap AG, Tuttlingen, Germany.
Plos One
|July 31, 2026
Summary
A new tibial implant design, oneKNEE®, shows improved anatomical fit and bony coverage compared to existing systems. Statistical Shape Models (SSM) analysis indicates superior performance, warranting further clinical validation.
Area of Science:
- Orthopedic biomechanics
- Medical device design
- Computational anatomy
Background:
- Optimal anatomical fit is crucial for modern tibial implants.
- Existing implant designs vary in their patient-specific anatomical matching.
- Statistical Shape Models (SSM) offer a method to evaluate implant-anatomy congruence.
Purpose of the Study:
- To compare the anatomical fit of a novel tibial implant (oneKNEE®) against three established systems.
- To assess implant coverage and cortical bone support using SSMs.
- To evaluate implant performance across diverse Caucasian and Asian anatomies.
Main Methods:
- Generated SSMs from CT scans of 120 Caucasian and 112 Asian patients.
- Included 14 Caucasian and 12 Asian patient anatomies representing border variations.
- Positioned tibial components using surgeon-defined protocols and analyzed fit dimensions, coverage, and cortical support.
Main Results:
- The oneKNEE® implant demonstrated superior bony coverage and cortical support across populations.
- Compared to Columbus® and PFC Sigma®, oneKNEE® showed significantly better bony coverage and cortical score (P < 0.01) in average anatomies.
- In less average anatomies, oneKNEE® provided statistically superior bony coverage over PFC Sigma®.
Conclusions:
- The new oneKNEE® tibial implant design exhibits enhanced virtual anatomical fit and coverage metrics.
- Computational modeling suggests a theoretical design-level improvement.
- Further biomechanical and clinical validation is necessary to confirm these findings.
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