Does a trochanteric lag screw improve fixation of vertically oriented femoral neck fractures? A biomechanical analysis in cadaveric bone.

Background: We assessed the biomechanical performances of a trochanteric lag screw construct and a traditional inverted triangle construct in the treatment of simulated Pauwels type 3 femoral neck fractures.

Methods: An inverted triangle construct (three 7.3-mm cannulated screws placed in inverted triangle orientation) and a trochanteric lag screw construct (two 7.

Predrilling does not improve the pullout strength of external fixator pins: a biomechanical study.

Objectives: External fixator pins are thought to have improved pullout strength if inserted into both cortices and if pilot holes are drilled. We tested these hypotheses and investigated effects of osteoporosis and pin location on pin pullout strength.

Methods: Self-drilling external fixator pins were inserted using 4 techniques: 1) predrilled bicortically inserted, 2) not predrilled bicortically inserted, 3) not predrilled unicortically inserted, and 4) technique 2 with far cortex disengaged to test holding power of near cortex in isolation.

Bone grafting in surgery about the foot and ankle: indications and techniques.

Bone grafting is a common procedure in foot and ankle surgery. Historically, autogenous bone graft has most often been harvested from the ipsilateral iliac crest. However, other sites offer similar volumes of cancellous bone and are associated with fewer complications.