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Mechanical strength of four different biceps tenodesis techniques
Metin Ozalay1, Sercan Akpinar, Oguz Karaeminogullari
1Department of Orthopaedics and Traumatology, Adana Medical Center, Baskent University School of Medicine, Turkey. mozalay@hotmail.com
Summary
The interference screw technique demonstrated superior initial biomechanical strength in biceps tenodesis compared to tunnel, anchor, and keyhole methods. While tunnel and interference screw techniques showed similar load-bearing capacities, the interference screw may offer better clinical outcomes.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Sports Medicine
Background:
- Biceps tenodesis is a common surgical procedure for various shoulder pathologies.
- Different techniques exist for biceps tenodesis, each with potential biomechanical implications.
- Understanding the biomechanical properties of these techniques is crucial for optimizing surgical outcomes.
Purpose of the Study:
- To compare the biomechanical properties of four distinct biceps tenodesis techniques.
- To evaluate the maximum load and deflection at maximum load for each technique.
Main Methods:
- A biomechanical experiment was conducted using 28 fresh sheep shoulders.
- Biceps tenodesis was performed using four techniques: tunnel, interference screw, anchor, and keyhole.
- Constructs were subjected to load-to-failure testing, with data analyzed using statistical methods.
Main Results:
- The interference screw technique yielded the highest average maximum load (243.3 N), followed by the tunnel (229.2 N), anchor (129.0 N), and keyhole (101.7 N) techniques.
- No significant differences in maximum load or deflection were found between the interference screw and tunnel techniques.
- Significant differences were observed when comparing the interference screw and tunnel techniques against the anchor and keyhole techniques.
Conclusions:
- The interference screw technique provided the strongest construct, followed by the tunnel, anchor, and keyhole techniques.
- While the interference screw and tunnel techniques showed comparable biomechanical performance, the interference screw may offer advantages for clinical application.
- These findings suggest that the interference screw technique may lead to improved initial stability and potentially better clinical results in biceps tenodesis.