Proper placement of the distal biceps tendon during repair improves supination strength--a biomechanical analysis
| Autor: | Hakim Louati, J. Whitcomb Pollock, Marc Prud'homme-Foster, Steven Papp |
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| Rok vydání: | 2014 |
| Předmět: |
Rotation
Elbow Biceps Supination Forearm Cadaver Tendon Injuries medicine Supinator muscle Humans Orthopedics and Sports Medicine Orthopedic Procedures Pronation Aged Aged 80 and over Rupture business.industry Biomechanics General Medicine Radial tuberosity Anatomy Middle Aged musculoskeletal system Tendon Biomechanical Phenomena body regions Radius medicine.anatomical_structure Torque Surgery business |
| Zdroj: | Journal of shoulder and elbow surgery. 24(4) |
| ISSN: | 1532-6500 |
| Popis: | Background Anatomic repair of the distal biceps tendon can be difficult to achieve. This study was designed to compare the effect of anatomic and nonanatomic repairs on forearm supination torque. A nonanatomic repair re-establishes the footprint radial and more anterior to the tuberosity apex, whereas an anatomic repair re-establishes the footprint ulnar and more posterior to the tuberosity apex. Methods Eight fresh frozen cadaver arms were surgically prepared and mounted on an elbow simulator. Controlled loads were applied to the long head and short head in positions of pronation, neutral, and supination. This was done with intact tendons and then repeated with repaired tendons that were repaired either anatomically (ulnar position) or nonanatomically (radial position). Results All anatomic repairs showed no difference compared with intact tendon measurements. In comparing anatomic and nonanatomic repairs, we found no differences in the supination torque when the forearm was in 45° of pronation. However, when the arm was in neutral rotation, we found that 15% less supination torque was generated by the nonanatomic repair. When the arm was tested in 45° of supination, we found that 40% less supination torque was generated in the nonanatomic repair ( P = .01). Conclusion This study supports the idea that an anatomic repair of the biceps tendon onto the ulnar side of the radial tuberosity is important. If the tendon is repaired too radially, the biceps will lose the cam effect and may not be able to generate full supination torque when the forearm is in neutral rotation or in supination. |
| Databáze: | OpenAIRE |
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