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A Novel Method for Preoperative Positioning of Total Ankle Replacement Using 3D Digital Model
Shi-Xun Wu1,2, Shi-Zhang Liu1, Ming Ling1
1Department of Orthopedics Surgery, Shaanxi Provincial People's Hospital, Xi'an Jiaotong University, Xi'an, China.
Orthopaedic Surgery
|June 3, 2022
Summary
This study developed a digital ankle model using 3D imaging for precise preoperative placement of total ankle replacement prostheses. Findings provide a reference for optimal prosthesis positioning in ankle arthroplasty surgery.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Radiology
Background:
- Total ankle replacement (TAR) requires precise prosthesis placement for optimal outcomes.
- Preoperative planning using digital models can improve surgical accuracy.
Purpose of the Study:
- To create a digital model of the ankle joint using 3D imaging.
- To explore the preoperative placement of ankle replacement prostheses using digital simulation.
Main Methods:
- Computed tomography (CT) images of 54 intact ankle joints were collected.
- Digital simulation using MIMICS software created surgical models and planned osteotomies.
- Distances from the center point to anatomical landmarks were measured for precise prosthesis positioning.
Main Results:
- A dataset of 48 cases (26 male, 22 female) was analyzed.
- Key measurements included medial malleolar angle, bone resection volume, and distances to anterior, posterior, medial, and lateral landmarks.
- Correlations were found between distances, age, bone resection, and ankle diameters.
Conclusions:
- The projection of the tibial centerline on the osteotomy surface is slightly anterior to the transverse diameter midpoint.
- Optimal total ankle replacement positioning is slightly anterior to the transverse and anteroposterior diameter midpoints.
- This digital simulation method serves as a valuable reference for preoperative planning in ankle arthroplasty.
