Preoperative measurement of the thickness of the center of the humeral head predicts screw cutout after locked plating of proximal humeral fractures.

Hypothesis And Background: Preoperative computed tomography (CT) scans can be used to measure the thickness of the center of the humeral head to identify patients at a higher risk of screw cutout after open reduction-internal fixation.

Methods: At an academic medical center, we performed a retrospective review of all patients aged ≥ 18 years who had sustained a proximal humeral fracture that was treated with open reduction-internal fixation between January 1, 2005, and December 31, 2014, and who underwent preoperative shoulder CT. Ninety-four patients were included.

Radiographic Review of Helical Blade Versus Lag Screw Fixation for Cephalomedullary Nailing of Low-Energy Peritrochanteric Femur Fractures: There is a Difference in Cutout.

Objectives: To compare the rate of cutout of helical blades and lag screws in low-energy peritrochanteric femur fractures treated with a cephalomedullary nail (CMN).

Design: Retrospective review.

Setting: Academic medical center.

Nail gun injury to the sacrum: case report and review of the literature.

Study Design: Case report.

Objective: Review the literature that relates to nail gun injuries to the spine using a case report illustration.

Summary Of Background Data: Approximately 37,000 patients present to the US emergency departments annually with injuries inflicted from nail guns, 60% of which occur in the workplace.

Near-terminal creep damage does not substantially influence fatigue life under physiological loading.

Cortical bone specimens were damaged using repeated blocks of tensile creep loading until a near-terminal amount of creep damage was generated (corresponding to a reduction in elastic modulus of 15%). One group of cortical bone specimens was submitted to the near-terminal damage protocol and subsequently underwent fatigue loading in tension with a maximum strain of 2000 με (Damage Fatigue, n=5). A second group was submitted to cyclic fatigue loading but was not pre-damaged (Control Fatigue, n=5).