Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association
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Multicenter Study
Clinical experience with three-dimensional printing techniques in orthopedic trauma.
To report our experiences with the use of three-dimensional (3D) printing in the field of orthopedic trauma. ⋯ In our experience, 3D printing technique provided surgeons with improved understanding of the fracture pattern and anatomy and was effectively used for preoperative planning, education of surgical trainees, and performing simulations to improve intra-operative technical outcomes.
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In skip pedicle screw fixation for adolescent idiopathic scoliosis (AIS), the mid-term effects of reducing screw number on correction and clinical results are uncertain. We clarified the mid-term outcomes of this technique in patients with Lenke type 1 and 2 AIS. ⋯ Correction using skip pedicle screw fixation in AIS was well maintained from the initial follow-up measurements to the final follow-up. The SRS-22r sub scores at the final follow-up were significantly improved over preoperative levels.
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Spine injury epidemiology in Japan has not been studied since the 1990s when its incidence was 39.4-40.2 per million and the major cause of injury was motor vehicle crashes. We elucidate the current epidemiological state of spinal injury and spinal injury patients in Japan for the clinicians and public health prevention programs. ⋯ The number of spine injuries has increased in the JTDB between 2004 and 2013. Motor vehicle crashes have been replaced by falls due to various causes as the leading cause of spine injury. Suicides and industrial accidents are becoming a burden. More studies are needed to verify the actual incidence.
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Botulinum toxin A treatment involves injecting botulinum toxin A to relax muscle spasticity. Using ultrasonography, this study examined changes in the muscle architecture before and after treatment to evaluate the influence of botulinum toxin A injection on muscles. ⋯ The decrease in the pennation angle after botulinum toxin A treatment is considered to be the result of a reduction of spasticity and subsequent structural changes in flaccid muscle fibers.