Factors predicting failure of patella fixation

Area of Science:

• Orthopedic Surgery
• Trauma Surgery
• Biomedical Engineering

Background:

• Patella fractures disrupt the quadriceps mechanism, necessitating surgical fixation.
• Current operative techniques for patella fractures have variable success rates.
• Understanding factors contributing to fixation failure is crucial for improving patient outcomes.

Purpose of the Study:

• To compare the effectiveness of different surgical fixation techniques for patella fractures.
• To identify the causes and predictors of fixation failure in operatively treated patella fractures.

Main Methods:

• Retrospective review of 173 operatively treated patella fractures from two Level I trauma centers.
• Exclusion of patients with <90 days follow-up, inadequate imaging, or patella excision.
• Analysis of 12 factors for predictive value of failure (defined as hardware breakage, nonunion, or displacement), reoperation, and hardware removal.

Main Results:

• 109 patients met inclusion criteria; 13 (12%) experienced fixation failure.
• Older patient age and use of K-wires (with or without tension-band wires) were significant predictors of failure.
• Increased follow-up time predicted reoperation and hardware removal.

Conclusions:

• Older age is associated with increased patella fracture fixation failure rates.
• K-wire fixation (alone or with tension-band wires) shows higher failure rates compared to screws or combined techniques.
• Longer follow-up correlates with higher rates of reoperation and hardware removal due to symptomatic hardware or complications.