Torsional force applied to the tibia of living lambs in an attempt to change the bone rotational axis.

Purpose: To evaluate the effects of torsional force on the rotational axis of living lamb tibias.

Methods: An external fixator device was designed to apply rotation to the tibias of lambs. Once a week, the bone distal extremity was rotated 2º.

Mechanical resistance of peripheral nerve repair with biological glue and with conventional suture at different postoperative times.

Regardless of its type, the repair of a peripheral nerve must ideally permit early motion of the affected limb and resist disruption by the tensile forces generated throughout the healing process and regeneration. A comparative study of the mechanical resistance of the repair of the sciatic nerve with biological glue and conventional microsurgical suture over time was undertaken in 48 rats. Both right and left sciatic nerves were exposed simultaneously and repaired at random with the glue on one side and conventional suture on the opposite side.

Tension band wire fixation for valgus osteotomies of the proximal femur: a biomechanical study of three configurations of fixation.

Background: A variety of techniques can be used to achieve stabilization of femoral valgus osteotomies in children, but what is lacking is a versatile fixation system that associates stability and versatility at different ages and for different degrees of deformity.

Methods: Mechanical tests of three configurations used to fix femoral valgus osteotomies, based on the tension band wire principle, were carried out. A 30 degrees wedge valgus osteotomy was performed at the subtrochanteric level in 60 swine femurs and fixed with three different systems.