Iván Federico Rubel

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Many different techniques have been reported for the treatment of clavicular nonunions. Those techniques involving screws and plate generally position the plate on the superior (subcutaneous) surface of the clavicle. To decrease the risk of screw pull-out and prominence of the instrumentation, we currently perform anteroinferior plating using a(More)
Traumatic hip dislocations associated with posterior wall fractures of the acetabulum in the pediatric population are in general a consequence of high-energy trauma. After expeditious reduction, instability mandates for further diagnosis and intervention. Plain radiographs or computerized tomography (CT) scans can misjudge the involvement of the posterior(More)
Subtrochanteric fractures after screw or pin fixation of femoral neck fractures are a recognized complication. No literature is available on this complication after fixation using the recently popularized cannulated screws. We present our experience in treating four of these complications. The common denominator for all four patients seemed to be an entry(More)
BACKGROUND The potential use of bone morphogenetic proteins (BMPs) to promote bone-healing is of great interest to orthopaedic surgeons. Although the complex mechanism leading from the local presence of BMP (whether endogenous or exogenous) to bone formation is increasingly understood, limited information is available as to whether endogenous BMPs, their(More)
BACKGROUND Several studies have compared different methods for fixation of the midpart of the humeral shaft, but there are only scattered data regarding which type of plate construct provides the best fixation for humeral nonunion. The objectives of this study were (1) to obtain objective data on the performance of four different plate constructs used for(More)
OBJECTIVE To determine the relative amount of fixation of self-reinforced poly-L-lactide (SR-PLLA) rods and Kirschner wires in bovine cancellous bone by comparing their pullout strength DESIGN An in vitro laboratory study was performed using bovine femurs. Ten two-millimeter-diameter pins of each type were inserted into cancellous bone and then pulled(More)
Breakage of an interlocking screw is a known complication in tibial fractures treated by intramedullary nailing. This happens most often in delayed union or nonunion because of the lack of progressive load transference from the nail to the healing bone. To treat this problem, the nail and screws need to be removed. This article describes a simple technique(More)
OBJECTIVE This study was designed to evaluate the postimpact response of the articular cartilage in the rabbit knee after a single traumatic episode. DESIGN A novel servo-controlled Rabbit Impact Test System (RITS) was developed to apply a well-defined trauma to the femoral condyle in the rabbit knee. The RITS was first used in an in vitro study to(More)
Fractures of the pelvic ring in children behave differently than in adults. In children, bone elastic properties allow for plastic deformation instead of complete breaks. To the best of our knowledge no reports of this bony behavior have been described in the sacrum, and this could explain the presence of single displaced anterior breaks without evident(More)