Definition One of the challenges for the diagnosis of subacromial impingement is the multiplicity of conditions with similar symptoms and variable clinical presentation. With no single aetiology, the clinical diagnosis of subacromial impingement has also suffered from a “lack of consensus on diagnostic criteria, case definition and even nomenclature”. For want of clarity, we suggest the followi...

OBJECTIVES To analyse the risk of shoulder impingement syndrome relative to shoulder intensive work. METHODS A cross sectional study of a historical cohort of 1591 workers employed between 1986 and 1993 at a slaughterhouse or a chemical factory. Workers not doing tasks in slaughtering or meat processing constituted the reference group. Intensity of shoulder work in meat processing tasks was a...

BACKGROUND Femoroacetabular impingement (FAI) is increasingly recognized as a potential cause of hip osteoarthritis. A system capable of pre-operatively simulating hip range of motion (ROM) by given surface models from either healthy or FAI diseased bone is desirable. METHODS An impingement detection system using bounding sphere hierarchies was first developed. Both precision and accuracy of ...

Computer modeling of 10 patients' computed tomographic scans was used to study the variables affecting hip arthroplasty range of motion before bony impingement (ROMBI) including acetabular offset and height, femoral offset, height and anteversion, and osteophyte removal. The ROMBI was compared with the ROM before component impingement and the native hip ROM. The ROMBI decreased with decreased t...

In situ stabilization remains the standard of care in the treatment of stable slipped capital femoral epiphysis (SCFE). Screw placement perpendicular to the physis has shown satisfactory results with minimal complications. A prominent screw head may produce femoral acetabular impingement and pain after in situ fixation in severe SCFE. We performed a biomechanical study to establish whether scre...

A femoral neck stress fracture is a serious condition that affects military personnel and endurance athletes. There is increasing evidence that femoroacetabular impingement contributes to significant hip pathology. This study investigates the prevalence of radiographic abnormalities associated with impingement in military personnel treated for femoral neck stress fractures. The radiographs of 6...

BACKGROUND The stump impingement reflex is a subtle bounce to the knee thought to be caused by hamstring contraction when the knee is brought into extension and the torn ACL stump impinges between the distal femur and the tibial plateau. We have studied the diagnostic value of this sign. FINDINGS From Feb 2008-Feb 2009, we audited 30 patients who underwent urgent arthroscopy for acutely locke...

BACKGROUND AND PURPOSE Several factors such as posture, muscle force, range of motion, and scapular dysfunction are commonly believed to contribute to shoulder impingement. The purpose of this study was to compare 3-dimensional scapular kinematics, shoulder range of motion, shoulder muscle force, and posture in subjects with and without primary shoulder impingement syndrome. SUBJECTS Forty-fi...

Subacromial impingement syndrome is a common cause of shoulder pain. The purpose of this article is to review the clinical presentation, physical examination findings, and differential diagnosis of impingement syndrome. Using an evidence-based approach, we propose an algorithm for the management of subacromial impingement syndrome including indications for nonoperative management, advanced imag...

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...