Computed tomography-based 3-dimensional preoperative planning for unlinked total elbow arthroplasty

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Radiology

Background:

• Total elbow arthroplasty (TEA) is a complex procedure.
• Accurate implant sizing and positioning are critical for successful outcomes.
• Traditional 2D planning methods have limitations in pre-operative assessment.

Purpose of the Study:

• To evaluate the efficacy of 3D surgical planning for unlinked TEA.
• To compare the accuracy of 3D versus 2D planning in estimating implant size and placement.
• To assess the potential of 3D planning to improve surgical precision.

Main Methods:

• Retrospective study of 28 patients undergoing unlinked TEA.
• Pre-operative CT scans used for 3D digital elbow model reconstruction.
• Comparison of 3D planning with traditional 2D radiographic planning.
• Intraoperative measurement to verify planned stem insertion.

Main Results:

• 3D planning achieved higher accuracy in stem size estimation (86% humerus, 96% ulna) compared to 2D planning (57% humerus, 68% ulna).
• Post-operative implant placement showed minimal mean deviations (e.g., 0.8° varus, 1.5° flexion for humeral component).
• Rotational positioning was not assessed in this study.

Conclusions:

• 3D surgical planning significantly enhances accuracy for implant size estimation and placement in unlinked TEA.
• This method holds promise for reducing complications and improving long-term results.
• 3D planning represents a valuable advancement in elbow replacement surgery.