Angulated locking plate in periprosthetic proximal femur fractures: biomechanical testing of a new prototype plate.

Introduction: To improve proximal plate fixation of periprosthetic femur fractures, a prototype locking plate with proximal posterior angulated screw positioning was developed and biomechanically tested.

Methods: Twelve fresh frozen, bone mineral density matched human femora, instrumented with cemented hip endoprosthesis were osteotomized simulating a Vancouver B1 fracture. Specimens were fixed proximally with monocortical (LCP) or angulated bicortical (A-LCP) head-locking screws.

Biomechanical investigation of an alternative concept to angular stable plating using conventional fixation hardware.

Background: Angle-stable locking plates have improved the surgical management of fractures. However, locking implants are costly and removal can be difficult. The aim of this in vitro study was to evaluate the biomechanical performance of a newly proposed crossed-screw concept ("Fence") utilizing conventional (non-locked) implants in comparison to conventional LC-DCP (limited contact dynamic compression plate) and LCP (locking compression plate) stabilization, in a human cadaveric diaphyseal gap model.

DensiProbe Spine: a novel instrument for intraoperative measurement of bone density in transpedicular screw fixation.

Study Design: Cadaver study.

Objective: To determine bone strength in vertebrae by measuring peak breakaway torque or indentation force using custom-made pedicle probes.

Summary Of Background Data: Screw performance in dorsal spinal instrumentation is dependent on bone quality of the vertebral body.

Biomechanical comparison of a new staple technique with tension band wiring for transverse patella fractures.

Background: The tension band wiring technique is the most common method of transverse patella fracture fixation. Since post-operative instabilities have been reported for this technique, alternative osteosynthesis solutions are of interest. We investigated the biomechanical behaviour of a new staple technique for treatment of transverse patella fractures in a cadaveric model.