Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association
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Comparative Study
Popliteus bypass and popliteofibular ligament reconstructions reduce posterior tibial translations and forces in a posterior cruciate ligament graft.
To measure the abilities of popliteus tendon (POP) and popliteofibular ligament (PFL) graft reconstructions to limit posterior tibial translations and alter forces in a PCL graft reconstruction after posterior cruciate ligament (PCL) and lateral collateral ligament (LCL) reconstruction. ⋯ These results provide further rationale for reconstructing torn posterolateral structures with a grade 3 posterolateral injury in combination with a PCL reconstruction.
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Posterolateral knee dislocation is a small subset of knee dislocations. Irreducible posterolateral dislocation has been reported and is caused by buttonholing of the medial femoral condyle into the anteromedial knee capsule, with interposition of the medial retinacular structures between the femoral and tibial condyles. Open reduction has been advocated to reduce the knee. ⋯ The first stage included arthroscopic debridement of the intervening tissues, which were thickened and resembled meniscal tissue, followed by reduction of the knee and open MCL repair to maintain the reduction. The second stage was done for ACL and PCL reconstruction. In conclusion we bring the attention of the surgeon to the clinical, radiographic, and MRI findings associated with this chronic irreducible posterolateral knee dislocation.
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Comparative Study
A comparison of risk between the lateral decubitus and the beach-chair position when establishing an anteroinferior shoulder portal: a cadaveric study.
The purpose of this study was to assess, using a technique that minimally distorts the normal anatomy, the risk of injury when establishing a 5 o'clock shoulder portal in the lateral decubitus versus beach-chair position. ⋯ Inserting anchor devices orthogonally would permit stronger fixation but presents the risk of damaging neurovascular structures. This study focused on showing the neurovascular risk of performing full orthogonal insertion. Considering the good results reported with the usual superior-anterior portals, we do not recommend performing a transubscapular portal in routine shoulder arthroscopy.