Postoperative patellar tilt in total knee arthroplasty

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Musculoskeletal Research

Background:

• Patellar alignment is crucial for successful total knee arthroplasty (TKA).
• Postoperative patellar tilt can lead to suboptimal outcomes and patient dissatisfaction.
• Understanding factors influencing patellar tilt is essential for improving surgical techniques.

Purpose of the Study:

• To investigate the factors affecting postoperative patellar tilt in patients undergoing bilateral total knee arthroplasty.
• To determine the correlation between preoperative patellar tilt and postoperative alignment.
• To evaluate the impact of surgical techniques on patellar tilt.

Main Methods:

• Retrospective analysis of 80 bilateral TKAs in 40 patients.
• Assessment of preoperative and postoperative patellar tilt.
• Evaluation of patellar resection obliquity and remnant thickness.
• Analysis of the effect of lateral peripatellar soft tissue release.

Main Results:

• Greater preoperative lateral patellar tilt was associated with increased postoperative tilt.
• Patellar resection obliquity significantly influenced postoperative lateral tilt.
• Increasing medial patellar remnant thickness reduced postoperative lateral tilt.
• Limited lateral peripatellar soft tissue release showed no significant effect on patellar tilt.

Conclusions:

• Preoperative patellar tilt is a predictor of postoperative alignment.
• Surgical technique, particularly patellar resection and remnant management, is key to controlling postoperative patellar tilt.
• Further research into optimizing patellar resurfacing techniques is warranted.