Hiroaki Tsutsui

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The purpose of this study was to investigate glenohumeral translation in-vivo during active shoulder abduction in the scapular plane. Three-dimensional (3D) models of 9 shoulders were created from CT scans. Fluoroscopic views aligned to the plane of the scapula were recorded during active arm abduction with neutral rotation. 3D motions were determined using(More)
Scapulohumeral rhythm (SHR) provides insight to neuromuscular control and fundamental biomechanics of the shoulder. This rhythm often is disrupted in pathologic shoulders. As the first step, we sought to quantify SHR in healthy subjects for diagnostic assessment of shoulder function. Ten healthy shoulders were studied. Three-dimensional models of the(More)
PURPOSE To determine the ability of magnetic resonance (MR) arthrography to depict the anatomic reestablishment of the capsulolabral complex after suture-anchor Bankart repair. MATERIALS AND METHODS Thirty patients (25 men, five women; mean age, 28 years) who had undergone suture-anchor Bankart repair of one shoulder underwent MR arthrography before(More)
BACKGROUND Spontaneous healing potential and progression of osteochondritis dissecans of the capitellum have been unclear. HYPOTHESIS Healing potential is high in the early stage of osteochondritis dissecans and low in the advanced stage. STUDY DESIGN Case series; Level of evidence, 4. METHODS This retrospective study examines 39 patients with(More)
BACKGROUND Advanced-stage osteochondritis dissecans of the capitellum affecting the lateral wall may result in osteoarthritis, and suitable treatment is needed to avoid permanent deformation and impaired function. We aimed to assess postoperative outcomes of costal osteochondral autograft for treatment of this condition. METHODS We included 22 young(More)
BACKGROUND Fractures of the proximal humerus are common and the repair of displaced fractures generally requires an operative approach. In elderly patients, osteoporosis makes internal fixation problematic and frequently contributes to failed fixation and poor clinical results. We have developed a new intramedullary nail (pin lock nail) for the repair of(More)
BACKGROUND Surgical treatments have been selected to treat advanced osteochondritis dissecans (OCD) of the humeral capitellum. PURPOSE To evaluate the clinical results of surgical treatments for advanced capitellar OCD lesion and to clarify problems of poor clinical results. METHODS Cases were reviewed for 27 patients with advanced OCD lesions treated(More)
Scapula-45 is an original roentogenographical technique to clarify objectively the function of the rotator cuff and scapulothoracic joint. This examination enables assessment of the function of the rotator cuff and scapulothoracic joint utilizing the radiographs of the glenohumeral joint. However, in the former technique, it was difficult for the technician(More)
Radiographic examination of the anterior part of the shoulder includes routine anterior-posterior imaging that enables easy visualization of traumatic injuries and true anterior-posterior imaging that enables the visualization of intra-articular injuries. The X-ray incident angle of true anterior-posterior imaging is affected by physique and posture.(More)
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