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A new intramedullary fixation method for distal biceps tendon ruptures: a biomechanical study
Pieter Caekebeke1, Joris Duerinckx1, Johan Bellemans1
1Department of Orthopaedic Surgery and Traumatology, Ziekenhuis Oost-Limburg, Genk, Belgium.
Journal of Shoulder and Elbow Surgery
|May 4, 2020
Summary
A new intramedullary fixation device for distal biceps tendon repair demonstrated comparable strength to traditional methods in biomechanical testing. This innovative device may offer a safer alternative, potentially reducing risks like nerve damage.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Musculoskeletal Research
Background:
- Current distal biceps tendon reinsertion techniques have limitations, including heterotopic ossification, nerve damage, and gap formation.
- Evaluating novel fixation devices is crucial to improve surgical outcomes and patient safety.
Purpose of the Study:
- To biomechanically assess a new intramedullary fixation device for distal biceps tendon repair.
- To compare the fixation strength of the new device against a classic extracortical button.
Main Methods:
- Biomechanical comparison of a standard bicortical button and a new intramedullary fixation device.
- Testing on fresh-frozen cadaveric specimens under cyclic and static loading conditions.
- Recording load to failure and method of failure for each fixation type.
Main Results:
- No device failures occurred during cyclic load testing.
- The new intramedullary button exhibited a higher mean load to failure (356 N) compared to the bicortical button (296 N).
- Similar tendon-bone displacement was observed between the two groups, with fewer anterior cortex breakouts in the new device group.
Conclusions:
- The new intramedullary fixation device provides comparable fixation strength to existing techniques in a biomechanical setting.
- Theoretical advantages, including reduced risk of posterior interosseous nerve lesions, suggest its potential as a valuable solution for distal biceps tendon rupture repair.
