Estudo biomecânico da influência da espessura do enxerto e da técnica de dois feixes na reconstrução do ligamento cruzado posterior / The biomechanical effect of graft thickness and two-bundle technique on posterior cruciate ligament reconstruction
AUTOR(ES)
João Alberto Ramos Maradei Pereira
DATA DE PUBLICAÇÃO
2005
RESUMO
The purpose of this study was to evaluate the biomechanical effect of graft thickness and two-bundle technique on posterior cruciate ligament (PCL) reconstruction of nine human cadaveric knees. Five conditions were tested: intact knee, single-bundle reconstruction with a 10mm-quadriceps tendon(Rec 1), two-bundle reconstruction with a 10mm-quadriceps tendon for the anterolateral bundle and a 7-mm doubled semitendinosus tendon for the posteromedial bundle(Rec 2), single-bundle reconstruction with a 10-mm quadriceps tendon plus a 7-mm doubled semitendinosus tendon (Rec M) and PCL-deficient. Posterior tibial translation (PTT) and stiffness to posterior tibial translation were measured in response to a 134-N posterior tibial load at 0, 30, 60 and 90° of knee flexion. All reconstruction techniques reduced posterior tibial translation at all flexion angles when compared with PCL-deficient knees. When compared with the intact knee, PTT of Rec 1 was significantly higher at all angles, PTT of Rec 2 was not significantly different at full extension and 30° of flexion, PTT of Rec M was not significantly different at full extension, 30 and 60° of flexion. Stiffness of all techniques was always significantly lower than the intact knee at all flexion angles. PTT of the Rec 2 and Rec M techniques was always significantly lower (better stability) than the PTT of Rec 1. PTT of Rec M was significantly lower than the PTT of Rec 2 at 60 and 90°. We concluded that graft enlargement improves the reconstruction stability in isolated PCL lesions, whereas the graft division to perform a two-bundle technique worsens this stability at 60 and 90° of knee flexion.
ASSUNTO(S)
ligamento cruzado posterior/cirurgia biomechanics posterior cruciate ligament/surgery knee injuries biomecânica transplantation autologous/methods cadaver transplante autólogo/métodos cadáver traumatismo do joelho
Documentos Relacionados
- Thick Graft Versus Double-Bundle Technique on Posterior Cruciate Ligament Reconstruction: Experimental Biomechanical Study with Cadavers
- Comparação entre dois protocolos de reabilitação após reconstrução do ligamento cruzado anterior através de análise biomecânica
- Comparação entre dois protocolos de reabilitação após reconstrução do ligamento cruzado anterior através de análise biomecânica
- An in vitro biomechanical comparison of anterior cruciate ligament reconstruction: single bundle versus anatomical double bundle techniques
- Biomechanical Evidence on Anterior Cruciate Ligament Reconstruction