PURPOSE To retrospectively and quantitatively analyze the acromial undersurface in three dimensions and to determine its association with impingement syndrome and rotator cuff tears. MATERIALS AND METHODS Institutional review board approval was received with exemption of informed consent for this retrospective HIPAA-compliant study. Magnetic resonance images were evaluated in 84 patients (63 ...

Operative treatment of femoroacetabular impingement (FAI) is a relatively new, yet rapidly expanding surgical innovation. Although the practice of surgery is inherently innovative, there is no clear distinction between minor technical variation and true modification that warrants testing. This raises important questions about how new procedures should be evaluated before being broadly dissemina...

BACKGROUND Subacromial impingement is a common cause of shoulder pain and one cause of rotator cuff disease. We aimed to identify which shoulder motions cause subacromial impingement by measuring the vertical displacement and peak strain of the coracoacromial ligament using ultrasound speckle tracking imaging. METHODS Sixteen shoulders without shoulder disability were enrolled. All subjects w...

Introduction Nowadays, the current understanding is that the shoulder impingement syndrome (SIS) is characterized by impairment and dysfunction of several structures, contained in the subacromial space, which alter normal shoulder movements of flexion and abduction and provoke pain. Currently, the SIS is a clinical diagnosis based on the patient’s history and physical findings which occurs at a...

However, during the recent decades the focus has been placed on the coordinated movements of the scapula and humerus; called as scapulohumeral rhythm, in shoulder impingement [4,5]. It is thought that abnormal scapular motion plays a significant role in the development shoulder impingement symptoms [6-9]. Functional loss and disability is the most common symptoms associated with shoulder imping...

Background: Open acromioplasty has classically been described as a method of treatment for subacromial shoulder impingement syndrome. However, the arthroscopic method of management has also recently gained wide popularity. Objective: The aim of this work was to present clinical outcome of arthroscopic decompression in the management of subacromial shoulder impingement syndrome. Study Design: A ...

PURPOSE The source of pain in patients with a stable shoulder and clinical signs of impingement is traditionally thought to be subacromial or outlet impingement, as popularized by Neer. This report introduces the concept of anterior internal impingement in patients with signs and symptoms of classic impingement syndrome and arthroscopic evidence of articular-side partial rotator cuff tear. Cont...