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Load-to-Failure, Contact Area and Contact Pressure of Three Rotator Cuff Repair Methods: A Comparative Biomechanical An

Load-to-Failure, Contact Area and Contact Pressure of Three Rotator Cuff Repair Methods: A Comparative Biomechanical Analysis. Josianne Lépine and Frédéric Balg, MD, FRCSC Department of Orthopaedic Surgery, Université de Sherbrooke In collaboration with

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Load-to-Failure, Contact Area and Contact Pressure of Three Rotator Cuff Repair Methods: A Comparative Biomechanical An

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  1. Load-to-Failure, Contact Area and Contact Pressure of Three Rotator Cuff Repair Methods: A Comparative Biomechanical Analysis Josianne Lépine and Frédéric Balg, MD, FRCSC Department of Orthopaedic Surgery, Université de Sherbrooke In collaboration with Denis Rancourt, PhD, Ève Langelier, PhD, and Nicolas Huppé, MSc Department of Mechanical Engineering, Université de Sherbrooke July 4th,2009 – COA Annual Meeting Disclosures : DePuy supplies, FRSQ training award

  2. 3 REPAIR METHODS 1- Transosseous 2- Double-row

  3. 3 REPAIR METHODS 3-Tendinous tension band • Time and cost • Less pulling forces on the anchors • Anchors fixed laterally into cortical bone • Convert traction into compression • Better decortication possible

  4. 1 - Maximal load tolerated before failure 2 – Tendon-to-bone contact area 3 – Tendon-to-bone contact pressure Hypothesis for all three : Tension band =Double-row > Transosseous 3 ASPECT STUDIED

  5. Sawbones ® LOAD-TO-FAILURE • Load applied at 135° 135 °

  6. CONTACT AREA AND PRESSURE • Initial immobilization • Better indicators of healing • Cadaveric shoulders • Pressure-sensitive film • Load of 12kg applied at 80° 80 °

  7. The tension band suture techniquehas a lower load to failure. The tension band suture techniquehas asignificantly lower contact area and contact pressure. The double-row anchor suture technique has significantly higher contact area and contact pressure than the transosseous sutures. CONCLUSION

  8. Special thanks to : Dr Frédéric Balg - Denis Rancourt - Ève Langelier - Nicolas Huppé The anatomy laboratory - Denis Bisson - Claudia Beaulieu - Elizabeth Tanguay AKNOWLEDGMENT

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