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BACKGROUND Rotator cuff tear (RCT) is a common musculoskeletal disorder in the elderly. The large RCT is often irreparable due to the retraction and degeneration of the rotator cuff muscle. The integrity of the teres minor (TM) muscle is thought to affect postoperative functional recovery in some surgical treatments. Hypertrophy of the TM is found in some(More)
Scoliosis is a condition that involves an abnormal curvature and deformity of the spinal vertebrae. The genetic background and key gene for congenital scoliosis in humans are still poorly understood. Ishibashi rats (ISR) have congenital malformation of the lumbar vertebrae leading to kyphoscoliosis similar to that seen in humans. To understand the(More)
STUDY DESIGN An animal study to achieve posterolateral intertransverse process spine fusion using mesenchymal stem cell (MSC). OBJECTIVE We investigated the effectiveness of graft material for spinal fusion using a rabbit model by examining the MSC with or without osteogenic differentiation. SUMMARY OF BACKGROUND DATA Posterolateral spinal fusion is(More)
The upper cervical spine is a common focus of destruction from rheumatoid arthritis (RA). Atlanto-axial subluxation (AAS) presents with marked frequency among patients with instability. However, there are occasional patients who show no motion between the occipital bone and atlas on a dynamic cervical radiograph in AAS patients. This study investigated the(More)
This study investigated the bony ankylosis of the upper cervical spine facet joints in patients with a cervical spine involvement due to rheumatoid arthritis (RA) using computed tomography (CT) and then examined the characteristics of the patients showing such ankylosis. Forty-six consecutive patients who underwent surgical treatment for RA involving the(More)
PURPOSE We retrospectively investigated the radiographic findings in patients with atlanto-axial subluxation (AAS) due to rheumatoid arthritis, and clarified the effect of reduction of the atlanto-axial angle (AAA) on the cranio-cervical and subaxial angles. METHODS Forty-one patients, consisting of 29 females and 12 males, with AAS treated by surgery(More)
BACKGROUND "Locomotive syndrome", a concept proposed by the Japanese Orthopaedic Association (JOA), refers to risk conditions among the elderly population that may lead to the need for nursing care services. The association between osteoporosis (OP) or chronic musculoskeletal pain (CMSP) and the screening results of locomotive dysfunction identified by the(More)
BACKGROUND Osgood-Schlatter disease (OSD) is a traction apophysitis of the tibial tuberosity. Ultrasonography (US) is able to detect pathologic changes, such as cartilage swelling and fragmentation of the tibial tubercle ossification center. PURPOSE To compare the US stages of tibial tuberosity development and the physical features and prevalence of OSD(More)
PURPOSE The purpose of this study was to anatomically measure the width of the cervical nerve root and spinal cord segment in addition to clarifying the anatomical characteristics of the cervical nerve root. METHODS We assessed 132 cervical nerve roots obtained from 11 cadavers. A total of 11 cervical spines from C3 to C8 were directly evaluated using(More)
BACKGROUND CONTEXT Reports of Gorham disease of the lumbar spine complicated by abdominal aortic aneurysms are rare. PURPOSE We herein report the case of a patient with Gorham disease of the lumber spine involving an abdominal aortic aneurysm (AAA). STUDY DESIGN Case report. METHODS A 49-year-old man had a 1-month history of right leg pain and severe(More)