BACKGROUND Humeral retrotorsion has been investigated in relation to shoulder range of motion (ROM) in healthy baseball players. Currently, there is limited information on the osseous anatomy and development of ulnar collateral ligament (UCL) tears. PURPOSE To determine the relationship between humeral retrotorsion and shoulder ROM in baseball players with a UCL tear. STUDY DESIGN Cross-sec...

The purpose of this study was to document range-of-motion differences and radiographic changes in the dominant shoulder of skeletally immature throwers and to determine how pain associated with throwing may relate to these changes. Seventy-nine male youth baseball players (aged 8-15 years) completed a questionnaire, a shoulder examination, and a series of radiographs to determine physeal change...

OBJECTIVE This article discusses the imaging findings, clinical findings, and conservative chiropractic management of 2 patients with glenoid hypoplasia. CLINICAL FEATURES Conventional radiographs of both patients revealed a hypoplastic glenoid bilaterally. Notch-like defects along with signs of degenerative disease were evident within the lower portion of the glenoid rims bilaterally in 1 pa...

INTRODUCTION: As compared to the axis of the elbow joint, the humeral head is directed inward and backward. This is called retroversion of the humeral head or retrotorsion of the humerus respectively (13). Orthopaedic interest in humeral torsion goes back to the 70's. In 1971 DEBEVOISE et al. were the first to suggest a relationship between humeral torsion and shoulder instability (3). Our own ...

A guest editorial on the multidirectional instability of the shoulder Introduction The multidirectional instability of the shoulder is a complex problem in terms of diagnosis and treatment. Distinct from multidirectional hyperlaxity, multidirectional instability has symptoms related with increased translations in more than one direction. Increased translation by the increased capsular ligamento...

Several recent studies have found that throwing athletes typically have lower humeral torsion (retroversion) and a greater range of external rotation at the shoulder than non-athletes. How these two parameters are related is debated. This study uses data from a sample of both throwers and non-throwers to test a new model that predicts torsion values from a range of motion data. The model propos...

Purpose: This study aimed to present the change in humeral retroversion (HR) angle (HRA) that occurs childhood and young adulthood potential developmental difference is observed wrestlers. Methods: HRA of dominant non-dominant shoulders (DSHRA NDSHRA, respectively) were measured using ultrasonography a group 30 wrestlers who started wrestling before age 13 years (Group 1), adults, aged between ...

BACKGROUND Total shoulder arthroplasty is technically demanding in regard to implantation of the glenoid component, especially in the setting of increased glenoid deformity and posterior glenoid wear. Augmented glenoid implants are an important and innovative option; however, there is little evidence accessible to surgeons to guide in the selection of the appropriate size augmented glenoid. M...