Panayiotis T. Hadjicostas

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PURPOSE The difference in ultimate strength between the quadriceps and patellar tendon could be reflected by different morphologic features. METHODS Standardized samples of quadriceps and patellar tendons were harvested from 20 cadavers and were investigated via light and electron microscopy, immunohistochemistry, and morphometry. The thickness of(More)
Ligaments and tendons are similar in composition but differ in proportion and arrangement. Tendons are being used as grafts for the ACL reconstruction. Their microscopic structure has not been sufficiently studied and compared to the native ACL. A null hypothesis was declared stating that the anterior cruciate ligament should be histological,(More)
We describe the mid-term results of a prospective study of total knee replacement in severe valgus knees using an osteotomy of the lateral femoral condyle and computer navigation. There were 15 knees with a mean valgus deformity of 21 degrees (17 degrees to 27 degrees) and a mean follow-up of 28 months (24 to 60). A cemented, non-constrained fixed bearing,(More)
PURPOSE Morphologic and histologic comparison of patella and hamstring tendon grafts. METHODS Hamstring tendons (semitendinosus and gracilis) and patellar tendons were taken from 20 cadaveric knees and were investigated by using light and electron microscopy, immunohistochemistry, and morphometry. The thickness of collagen fibrils, fibril/interstitum(More)
Semitendinosus and gracilis tendons taken from 25 cadaveric knees were investigated using light and electron microscopy, immunohistochemistry, and morphometry. Thickness of the collagen fibrils, fibril/interstitium ratio, density of blood vessels, density of fibroblasts, and distribution of the collagen fibrils (types I, III, and V collagen and elastic(More)
OBJECTIVE The aim of the present study was to perform a comparative evaluation of septic and aseptic interface membranes, assessing histological features, inflammatory infiltrate, and expression of inflammatory cytokines. METHODS Septic and aseptic interface membranes from 102 patients were examined by histology, histochemistry, and immunohistochemistry(More)
Massive and irreparable rotator cuff tears are a challenge for the orthopaedic surgeon. The purpose of this study was to report our experience with the treatment of massive and irreparable defects of the rotator cuff with a modified deltoid split transfer. Between 1996 and 2004, for all patients suffering from full-thickness tears of the rotator cuff (>5 cm(More)
From January 2003 and February 2006, 31 displaced acetabular fractures were treated by open reduction and internal fixation. The fractures were managed using a single approach, involving a straight lateral incision centered over the greater trochanter, trochanteric osteotomy and dislocation of the femoral head. The mean age of the patients was 48 (range(More)
Use of the OrthoPilot navigation system (B. Braun Aesculap, Tuttlingen, Germany) in navigated revision surgery allows for precise alignment of components, restoration of the joint line, balance of the gaps, and filling of the bony defects by facilitating selection of appropriate implant sizes and wedges. Our study results confirm these benefits through(More)
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