Masashi Hachiya

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STUDY DESIGN Our original performance test for evaluating the severity of cervical myelopathy, the triangle step test (TST), was introduced along with an assessment of its validity. OBJECTIVE The TST was designed to evaluate the lower extremity motor function objectively and quantitatively. This study aimed to assess the validity of the test by analyzing(More)
A age-related morphological changes in bow legs and knock knees were studied on roentgenograms taken in a standing , notably on alignment of the lower extremities. In the present study comparisons of chronological changes of this alignment, which was assessed by the femoro-tibial angle, were made between 3 groups of children under 16 years of age: 350(More)
STUDY DESIGN A study using intraoperative sonography (IOS) was conducted for evaluating neural mobility in anterior cervical decompression surgery. OBJECTIVES To analyze decompression status and mobility of the spinal cord and the nerve root during anterior cervical decompression and to clarify its relevance to the postoperative neurological recovery. (More)
OBJECTIVES There are several reports clarifying successful results following open reduction using Ludloff's medial approach for congenital (CDH) or developmental dislocation of the hip (DDH). This study aimed to reveal the long-term post-operative course until the period of hip-joint maturity after the conventional surgical treatments. METHODS A long-term(More)
STUDY DESIGN An intraoperative sonographic study for evaluating spinal cord decompression status was conducted. OBJECTIVES To analyze the spinal cord decompression status using intraoperative sonography and to evaluate the relation to postoperative neurologic recovery following cervical laminoplasty. SUMMARY OF BACKGROUND DATA Since the 1980s, several(More)
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