The Key Pinch Stress Radiograph to Evaluate Dorsal Subluxation in the Basilar Thumb Joint.

The basilar thumb joint is the joint second most commonly affected by osteoarthritis (OA) in the hand. Evaluation of dorsal subluxation of the thumb during a functional task such as key pinch could help assess OA risk. The objectives of this study were to determine the best imaging angle for measuring thumb dorsal subluxation during key pinch and to compare subluxation to corresponding OA grades on the Eaton-Glickel, Outerbridge, and International Cartilage Repair Society scales.

Initial Response of Mature, Experienced Runners to Barefoot Running: Transition to Forefoot Strike.

Introduction: Forefoot strike has been advocated for many runners because of the relatively lower impact and push-off forces compared to a heel strike. The purpose of this study was to explore the ability of mature (> 30 years old), experienced runners to transition from a heel foot strike to a forefoot strike when first introduced to barefoot running on a treadmill. We hypothesized: 1) mature runners who heel strike while wearing traditional training shoes would persist in heel striking immediately following a switch to barefoot, 2) mean shoe heel-to-toe drop would be significantly greater in runners who persist in heel striking when running barefoot compared to those who transition to a forefoot strike pattern, and 3) there would be a significant decrease in heel striking in the barefoot condition as running speeds increased.

Reoperation Rates and Costs of Radial Head Arthroplasty Versus Open Reduction and Internal Fixation of Radial Head and Neck Fractures: A Retrospective Database Study.

We conducted a retrospective study to compare reoperation/conversion rates and costs between open reduction and internal fixation (ORIF) and radial head arthroplasty (RHA) in patients with radial head/neck fractures. We examined the Humana Orthopedic data sets using the PearlDiver Application from January 2007 to June 2016 to identify patients with radial head and neck fractures with and without a concurrent elbow dislocation. Time to revision surgery, odds ratios, and survival curves for reoperations/conversions were calculated comparing ORIF and RHA.

Evaluation of midcarpal capitate contact mechanics in normal, injured and post-operative wrists.

Background: Scapholunate ligament injury is a commonly occurring carpal ligament injury. Pathology associated with scapholunate ligament injury depends on several factors such as the time after injury, type of injury (instability) and the development of osteoarthritis. The aim of this study was to investigate and compare contact mechanics in the lunocapitate and scaphocapitate joints in the normal, injured (scapholunate dissociation) and repaired (postoperative) wrist.