Related Experiment Videos
Bone morphing: 3D morphological data for total knee arthroplasty
E Stindel1, J L Briard, P Merloz
1Centre Hospitalier et Universitaire de Brest, Hôpital de la Cavale Blanche and Laboratoire de Traitement de l'Information Médicale, INSERM, ERM 0102 Brest, Grenoble, France. eric.stindel@chu-brest.fr
Summary
This study introduces Bone Morphing, a new surgical method for total knee arthroplasty (TKA) that uses morphologic and geometric data without preoperative imaging. It improves accuracy by focusing on soft-tissue balance for better knee kinematics and anatomy.
Area of Science:
- Orthopedic surgery
- Biomedical engineering
- Surgical navigation
Background:
- Total knee arthroplasty (TKA) clinical outcomes depend on surgical accuracy.
- Accurate TKA requires precise prosthesis alignment and soft-tissue balance.
- Morphologic and geometric data are crucial for improving TKA results.
Purpose of the Study:
- To present a novel method for performing TKA using morphologic and geometric data without preoperative imaging.
- To integrate soft-tissue balancing into intraoperative planning for optimized kinematics and anatomy.
- To offer an alternative to CT-based methods for TKA.
Main Methods:
- A global method utilizing an optical 3D localizer for point digitization.
- Morphologic data acquired through registration of sparse point data with a 3D statistical deformable model.
- Mechanical axis construction using hip center kinematics and ankle center landmark digitization, with knee center determined by soft-tissue balance.
Main Results:
- The Bone Morphing system has been used in a randomized clinical trial with 35 patients over 6 months.
- Postoperative frontal alignment in the first 11 navigated patients was within 180 +/- 3 degrees.
- Functional evaluation of soft-tissue balancing via fluoroscopy is ongoing over a 2-year study.
Conclusions:
- Bone Morphing is an accurate, fast, and user-friendly technique for obtaining essential morphologic and geometric data.
- The method innovatively incorporates soft-tissue balancing into intraoperative planning.
- Bone Morphing presents a viable alternative to CT-based TKA procedures.