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BACKGROUND Early passive motion exercise has been the standard rehabilitation protocol after rotator cuff repair for preventing postoperative stiffness. However, recent approaches show that longer immobilization may enhance tendon healing and quality. PURPOSE To elucidate whether early passive motion exercise affects functional outcome and tendon healing(More)
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(More)
PURPOSE The purpose of this study was to compare the clinical outcomes of immediate rotator cuff repair with capsular release and those of rotator cuff repair after the stiffness was treated with rehabilitative therapy. METHODS Between June 2007 and December 2010, we recruited 63 patients with rotator cuff tears and stiffness. In 33 patients arthroscopic(More)
BACKGROUND Many shoulder diseases are related to glenohumeral joint synovitis and effusion. The purpose of the present study is to detect effusion within the biceps long head tendon sheath as the sign of glenohumeral joint synovitis using ultrasonography, and to evaluate the clinical meaning of effusion within the biceps long head tendon sheath. METHODS A(More)
This article describes an arthroscopic technique for the fixation of clavicle shaft fractures. A viewing portal is made 2 cm anterior to the fracture site, and a working portal is made 2 cm lateral to the fracture site. The guide wire for a 4.0-mm cannulated screw is inserted through the fracture site to the medial fracture fragment under arthroscopic(More)
In this paper, the SAE52100 bearing steel contained large quantities of cementite dispersed in ferrite matrix was subjected to the ultrasonic nanocrystalline surface modification (UNSM) treatment that aims for the extension of fatigue life. The microstructure and fatigue life of the untreated and treated specimens were studied by using electron(More)
BACKGROUND Local analgesic injections are commonly used for pain relief after shoulder surgery. The aim of this study was to compare the efficacy of local injections administered in the glenohumeral joint, the subacromial space, or both locations after arthroscopic rotator cuff repair. METHODS Between March 2011 and December 2011, 121 consecutive patients(More)
In this work, an Al-7 wt.% Si alloy, which is widely used as the structural materials in the automotive and aerospace industries for their high specific strength, was subjected to ultrasonic nanocrystalline surface modification (UNSM) treatment. After UNSM treatment, the effect of UNSM on the microstructural evolution of both Al grain and the dispersed Si(More)
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