Association Between a Rule Change to Reduce Home Plate Collisions and Mild Traumatic Brain Injury and Other Injuries in Professional Baseball Players.

Background: Improved player safety is an important goal of professional baseball. Prevention of mild traumatic brain injury (concussion) is an area of emphasis because of the potential for long-term as well as short-term sequelae.

Hypothesis: A rule change can lower the incidence of concussions and other injuries in professional baseball.

Measurement of bone density around the Oxford medial compartment knee replacement using iDXA. A precision study.

The goal of this study was to evaluate whether the Lunar iDXA densitometer can accurately measure the bone mineral density (BMD) around the tibial component of the Oxford unicompartment knee replacement (UKR). Both knees in 20 patients were measured 3 times in the supine position with repositioning between each scan. We chose 7 regions of interest to evaluate the bone density around the implant.