Hirokazu Iida

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STUDY DESIGN The incidences of postoperative C5 palsy between a group treated by a standardized diagnostic and surgical treatment and a control group treated by a different cervical laminoplastic technique were prospectively compared. OBJECTIVE To investigate the cause, risk factors, and prevention of C5 palsy after laminoplasty for cervical myelopathy.(More)
BACKGROUND CONTEXT Cervical laminoplasty is a good strategy for cervical myelopathy, but some postoperative patients complain of obstinate axial symptoms after surgery, that is, nuchal pain, neck stiffness, and shoulder pain. It was reported that these symptoms proved to be more serious than has been believed and should be considered in the evaluation of(More)
Atlanto-axial subluxation, which was causing symptoms in eight patients with Down's syndrome, was treated by operation. In every case various congenital bony anomalies were found. Marked myelopathy was present in four cases of ossiculum terminale, and mild myelopathy in one with anteroposterior spondyloschisis. Successful posterior arthrodesis was performed(More)
BACKGROUND Bone marrow cells possess multipotentiality and have been used for several treatments. We hypothesized that bone marrow cells might differentiate into regenerated tendon and that several cytokines within bone marrow cells might accelerate tendon healing. Therefore, we treated Achilles tendon ruptures in a rat model with transplantation of whole(More)
BACKGROUND Up-regulation of the expression of the gene C7orf24, encoding γ-glutamyl cyclotransferase, is a common event in cancers derived from various tissues, but its involvement in osteosarcomas (OS) has not yet been demonstrated. MATERIALS AND METHODS The expression of C7orf24 was analyzed in human OS cell lines and primary tumor samples. The(More)
OBJECTIVE The aim of this work was to evaluate an ultra-high spatial resolution SPECT system with a semiconductor detector and a high-resolution parallel-hole collimator or a pinhole collimator for small animal imaging. METHODS We evaluated an ultra-high spatial resolution SPECT system with a high-resolution parallel-hole collimator attached to a cadmium(More)
The purpose of this study was to compare anterior cruciate ligament (ACL) regeneration between animal groups subjected to intra-articular injection of fresh whole bone marrow cells (BMCs), cultured mesenchymal stem cells (MSCs), or saline. Partially transected ACLs in Fischer 344/Nslc rats were prepared, followed by injection of BMCs, MSCs, or saline into(More)
We compared the polyethylene wear of acetabular sockets articulated with 22.225-mm alumina heads with the polyethylene wear of those articulated with 22.225-mm zirconia heads in cemented total hip arthroplasty during a mean follow-up period of 5.4 years. Using a computer-aided technique, we measured polyethylene wear radiologically in 46 hips with alumina(More)
OBJECT Surgical outcome and radiographic changes after microsurgical bilateral decompression via a unilateral approach (MBDU) for lumbar spinal canal stenosis during midterm follow-up periods (> 2 years) have not been reported. The authors retrospectively investigated surgical outcomes after MBDU in patients with lumbar degenerative spondylolisthesis with(More)
We present the long-term results (mean follow-up, 11.8 years; range, 6.3-15.4 years) of cemented total hip arthroplasty with acetabular bulk bone grafting in 147 dysplastic hips using improved surgical techniques. Operations were performed through a direct lateral approach with partial trochanteric osteotomy to avoid nonunion of the greater trochanter.(More)