Posterior cruciate ligament reconstruction. An in vitro study of femoral and tibial graft placement
| Autor: | Edward S. Grood, Frank R. Noyes, Martin S. Levy, John N. Mehalik, Stephen C. Saddler, Marc T. Galloway |
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| Rok vydání: | 1996 |
| Předmět: |
musculoskeletal diseases
Physical Therapy Sports Therapy and Rehabilitation Knee Injuries Achilles Tendon Cruciate ligament 03 medical and health sciences 0302 clinical medicine Cadaver medicine Humans Orthopedics and Sports Medicine Tibia 030222 orthopedics Achilles tendon business.industry Posterior Cruciate Ligament Reconstruction 030229 sport sciences Anatomy Prostheses and Implants musculoskeletal system Tendon Biomechanical Phenomena medicine.anatomical_structure Orthopedics Posterior cruciate ligament Posterior Cruciate Ligament business Cadaveric spasm |
| Zdroj: | The American journal of sports medicine. 24(4) |
| ISSN: | 0363-5465 |
| Popis: | We studied posterior cruciate ligament reconstruction in a cadaveric model using two substitutes: a 1-mm diameter flexible cable and an 11-mm diameter Achil les tendon autograft. The thin cable allowed us to study five femoral and five tibial attachments in each knee. A nearly isometric attachment was located after cutting the posterior cruciate ligament while the tibia was re duced with a 100 N anterior force. The five femoral locations studied were the isometric location and four locations centered around this isometric point. The Achilles tendon reconstruction was used with both an isometric and a nonisometric femoral site, allowing us to confirm the results with the wire cable. Posterior motion limits were measured under a 100 N posterior force in the intact, posterior cruciate ligament-deficient, and posterior cruciate ligament-reconstructed knees. We found that the restoration of knee stability in flexion depended strongly on the femoral attachment location. A femoral attachment that was nonisometric by intra operative measurement, but within the posterior cruci ate ligament anatomic footprint, most closely repro duced the intact knee's posterior motion limits. Variations in the tibial attachment site produced only minor changes in the posterior motion limits. We con cluded that the proximal-distal location selected for the femoral attachment of a posterior cruciate ligament substitute was particularly important in the restoration of normal posterior motion limits. |
| Databáze: | OpenAIRE |
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