Accuracy of the anterior apprehension test as a predictor of risk for redislocation after a first traumatic shoulder dislocation.

Background: The treatment options for a first traumatic shoulder dislocation in a young patient are either nonoperative care or primary surgery. It would be valuable to find patient-specific assessments that could predict the risk for redislocation in these patients and thereby identify those who would benefit from primary surgery.

Hypothesis: The supine apprehension test, performed after completion of physical therapy in first traumatic shoulder dislocators, can predict risk for redislocation.

Risk factors for idiopathic frozen shoulder.

Background: Idiopathic frozen shoulder is a self-limiting regional skeletal problem of unknown etiology. Clinically, patients first experience a phase of pain, progressing to a freezing stage when glenohumeral motion is lost, followed by a thawing phase when pain gradually subsides and most of the lost motion returns.

Objectives: To identify possible specific and non-specific risk factors for idiopathic frozen shoulder.

The effect of muscle fatigue on in vivo tibial strains.

Stress fracture is a common musculoskeletal problem affecting athletes and soldiers. Repetitive high bone strains and strain rates are considered to be its etiology. The strain level necessary to cause fatigue failure of bone ex vivo is higher than the strains recorded in humans during vigorous physical activity.