The shoulder of a packaging machine is a developable surface that guides the packing material without stretching or tearing. The shoulder is traditionally manufactured by bending a flexible plate along a given bending curve, also without stretching ortearing. In this paper, the shoulder geometry isdescribed mathematically b methods from classical differential geometry. For a given bending curve...

Shoulder arthroplasty is a technically demanding procedure to restore shoulder function in patients with severe osteoarthritis of the glenohumeral joint. The modern prosthetic system exploit the benefits of modularity and the availibility of additional sizes of the prosthetic components. In this paper we describe the biomechanics of shoulder arthroplasty and the technique for shoulder replaceme...

Background: Prevalence of recurrent shoulder dislocation in patients taking tramadol has not been studiedyet so, this study aims to study the recurrent shoulder dislocation following tramadol induced seizure. Methods: In this cross-sectional study, 205 patients with recurrent shoulder dislocation complaints (2 or more) referred to Shafa Orthopedic and Iranmehr hospitals Tehran, Iran, from Oc...

Background: This study was conducted to evaluate the clinical outcomes of acromioclavicular joint (ACJ) fixation with hook plate (HP) and continuous loop double endobutton fixation (CLDE) in treatment of the acute acromioclavicular joint (ACJ) dislocation. Methods: In this retrospective study, 8 patients with HP and 9 patients with CLDE fixations were compared for acute ACJ dislocations. ...

RATIONALE Proximal humerus fracture occuring simultaneously with dislocation of a shoulder in children is extremely rare, with only a few recent reports of on such cases having been reported. PATIENT CONCERNS A 6-year-old girl fell from a ladder and landed on her dominant right arm with pain in the right shoulder and unable to perform movements; her shoulder did not allow for passive movement...

Neviasa JS. Adhesive capsulitis of the shoulder. A study of the pathological findings in periarthritis of the shoulder. J Bone J'oint Surg 1945 ;27 :211-22. 2 Bruckner FE, Nye CJS. A prospective study of adhesive capsulitis of the shoulder ("frozen shoulder") in a high risk population. Q 7 Med 1981; 198:191-204. 3Wright V, Haq AMMM. Periarthritis of the shoulder. II. Radiological features. Ann ...

OBJECTIVE To investigate the prevalence and course of pass notive shoulder range of motion in people with a spinal cord injury and the relationships between shoulder range of motion limitations and personal and lesion characteristics. DESIGN Multicentre longitudinal study. SUBJECTS A total of 199 subjects with spinal cord injury admitted to specialized rehabilitation centres. METHODS Asse...

OBJECTIVE To investigate whether somatosensory impairments are more common in individuals with post-stroke shoulder pain than in those without post-stroke shoulder pain and healthy controls. DESIGN Descriptive analysis of a convenience sample. PARTICIPANTS Forty-nine individuals with stroke, 24 with and 25 without post-stroke shoulder pain (median age 65 years), and 11 age- and sex-matched ...

BACKGROUND Following shoulder arthroplasty, any well-planned rehabilitation program should include muscle strengthening. However, it is not always clear how different external loads influence shoulder kinematics in patients with shoulder prostheses. The objective of this study was to describe shoulder kinematics and determine the contribution of the scapulothoracic joint to total shoulder motio...

STUDY DESIGN A retrospective study. OBJECTIVE To evaluate the effect of preoperative clavicle chest cage angle difference (CCAD) on postoperative radiographic shoulder imbalance, cosmetic shoulder balance, patient's satisfaction, and surgeon's fulfillment in Lenke I adolescent idiopathic scoliosis (AIS). SUMMARY OF BACKGROUND DATA CCAD is a novel predictor of postoperative radiographic shou...