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Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association

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https://www.readbyqxmd.com/read/29229239/in-vivo-postoperative-motion-analysis-of-metal-and-ceramic-bipolar-hip-hemiarthroplasty
#1
Toru Yoshioka, Nobukazu Okimoto, Yoshifumi Fuse, Makoto Kawasaki, Toshiharu Mori, Akinori Sakai, Tokifumi Majima
BACKGROUND: We hypothesized that ceramic bipolar shows less impingement between stem neck and outer head compared to metal bipolar, because of its low coefficient of friction with the acetabulum cartilage. In this paper, a three dimensional (3D) postoperative motion analysis has been used to assess the different motion characteristics of metal and ceramic bipolar hip hemiarthroplasty systems. METHODS: This study was conducted on 40 patients divided in two matched cohorts: 20 patients with metal bipolar and 20 patients with the ceramic bipolar...
December 8, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29198598/mid-term-results-of-computer-assisted-skip-pedicle-screw-fixation-for-patients-with-lenke-type-1-and-2-adolescent-idiopathic-scoliosis-a-minimum-five-year-follow-up-study
#2
Masashi Uehara, Jun Takahashi, Shota Ikegami, Shugo Kuraishi, Toshimasa Futatsugi, Hiroki Oba, Michihiko Koseki, Hiroyuki Kato
PURPOSE: 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. METHODS: Thirty-four patients who underwent skip pedicle screw fixation (mean screw density: 1.35 screws) for Lenke type 1 and 2 AIS were retrospectively reviewed. The follow-up period was at least 5 years (mean follow-up period: 6...
November 30, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29198597/the-position-of-the-aorta-relative-to-the-spine-in-patients-with-pott-s-thoracolumbar-angular-kyphosis
#3
Yan Liang, Yongfei Zhao, Haiying Liu, Zheng Wang
STUDY DESIGN: Analyze the position of the aorta in patients with Pott's thoracolumbar angular kyphosis by computed tomography. OBJECTIVE: To investigate the anatomic position of the aorta relative to spine in patients with Pott's thoracolumbar angular kyphosis. SUMMARY OF BACKGROUND DATA: The complication of aorta injury is rare in the procedure of spinal osteotomy for the correction of Pott's thoracolumbar angular kyphotic deformity. However, there would be a disastrous consequence once it happened...
November 30, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29198491/preliminary-algorithm-for-differential-diagnosis-between-spinal-meningioma-and-schwannoma-using-plain-magnetic-resonance-imaging
#4
Eiichiro Iwata, Hideki Shigematsu, Yusuke Yamamoto, Sachiko Kawasaki, Masato Tanaka, Akinori Okuda, Yasuhiko Morimoto, Keisuke Masuda, Munehisa Koizumi, Manabu Akahane, Yasuhito Tanaka
BACKGROUND: Preoperative differential diagnosis between spinal meningioma and schwannoma is critical due to the characteristic differences of the surgical treatments. Thus, we aimed to develop an algorithm for the differential diagnosis of these two lesions based on plain MRI findings. METHODS: We retrospectively reviewed plain MR images from patients who had undergone surgical treatment for meningiomas and schwannomas in our hospital between 2002 and 2016. Seven findings characteristic of meningioma or schwannoma were considered: (a) low or equal signal intensity on T2-weighted images, (b) obtuse angle from the dura mater, (c) anterior location in the spinal canal, (d) cystic degeneration, (e) lumbar occurrence, (f) oval or round shape, and (g) dumbbell type...
November 29, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29191390/efficacy-of-intraoperative-lumbar-subarachnoid-drainage-for-prevention-of-cerebrospinal-fluid-leak-after-spinal-cord-tumor-resection
#5
Kazuyoshi Kobayashi, Kei Ando, Kenyu Ito, Mikito Tsushima, Akiyuki Matsumoto, Masayoshi Morozumi, Satoshi Tanaka, Masaaki Machino, Naoki Ishiguro, Shiro Imagama
BACKGROUND: Postoperative cerebrospinal fluid (CSF) leakage is a major clinical problem, and prevention of CSF leakage at the surgical site is an important issue. The goal of the study was to evaluate the efficacy of intraoperative lumbar subarachnoid drainage (LSAD) for prevention of CSF leakage after spinal cord tumor resection. METHODS: The subjects were 97 patients with a cervical or thoracic primary intradural spinal cord tumor who underwent surgery at our hospital...
November 27, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29191389/challenges-faced-by-the-japanese-orthopaedic-association-in-the-treatment-and-prevention-of-locomotive-organ-disorders-in-the-era-of-super-ageing
#6
EDITORIAL
Masashi Yamazaki
No abstract text is available yet for this article.
November 27, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29187291/patient-reported-outcomes-in-patients-who-undergo-total-hip-arthroplasty-after-periacetabular-osteotomy
#7
Yusuke Osawa, Yukiharu Hasegawa, Taisuke Seki, Yasuhiko Takegami, Takafumi Amano, Naoki Ishiguro
BACKGROUND: There has been constant discussion about whether the clinical outcome of THA after periacetabular osteotomy (PAO) is equivalent to that after primary total hip arthroplasty (THA). However, there have been few reports about patient-reported outcomes (PRO) for those who undergo THA after PAO. We compared the pre- and postoperative PRO of patients who underwent THA after PAO and those who underwent primary THA alone. METHODS: We performed a case-control study...
November 26, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29174423/posterior-spinal-fusion-for-scoliosis-after-fontan-procedure-a%C3%A2-case%C3%A2-series
#8
Masashi Uehara, Jun Takahashi, Yohei Akazawa, Shugo Kuraishi, Shota Ikegami, Toshimasa Futatsugi, Hiroki Oba, Hiroyuki Kato
BACKGROUND: As the surgical treatment of scoliosis after a Fontan procedure is very challenging due to the risk of various perioperative complications, case reports are scarce. We herein describe three patients who were successfully treated for scoliosis following a Fontan procedure and discuss their clinical and radiological outcomes. METHODS: We retrospectively reviewed three cases of scoliosis treated by posterior spinal fusion after a Fontan procedure. RESULTS: Mean preoperative major curve Cobb angle was 83...
November 23, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29174422/bioabsorbable-magnesium-versus-standard-titanium-compression-screws-for-fixation-of-distal-metatarsal-osteotomies-3-year-results-of-a-randomized-clinical-trial
#9
Christian Plaass, Christian von Falck, Sarah Ettinger, Lena Sonnow, Franco Calderone, Andreas Weizbauer, Janin Reifenrath, Leif Claassen, Hazibullah Waizy, Kiriakos Daniilidis, Christina Stukenborg-Colsman, Henning Windhagen
BACKGROUND: For the treatment of hallux valgus commonly distal metatarsal osteotomies are performed. Persistent problems due to the hardware and the necessity of hardware removal has led to the development of absorbable implants. To overcome the limitations of formerly used materials for biodegradable implants, recently magnesium has been introduced as a novel implant material. This is the first study showing mid-term clinical and radiological (MRI) data after using magnesium implants for fixation of distal metatarsal osteotomies...
November 23, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29174421/morphological-changes-of-vertebral-compression-fracture-with-intra-vertebral-cleft-treated-with-percutaneous-vertebroplasty
#10
Sang-Min Park, Jae-Woo Park, Hyoungmin Kim, Ho-Joong Kim, Jin S Yeom, Choon-Ki Lee, Bong-Soon Chang
BACKGROUND: Vertebroplasty represents an established treatment option for osteoporotic vertebral compression fracture (OVCF), but its radiographic and clinical outcomes have not been clearly described in patients with intra-vertebral cleft (IVC). The aim of this study was to assess vertebral height restoration, recollapse and change of back pain in OVCF patients with or without IVC. METHODS: The records of 108 patients with IVC (group I) and 233 patients without IVC (group II) were included in our analysis between March 2001 and February 2014...
November 23, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29174032/associations-between-neck-symptoms-and-ldl-cholesterol-in-a-cross-sectional-population-based-study
#11
Gentaro Kumagai, Kanichiro Wada, Toshihiro Tanaka, Hitoshi Kudo, Toru Asari, Daisuke Chiba, Seiya Ota, Shigeyuki Nakaji, Yasuyuki Ishibashi
BACKGROUND: Studies have reported associations between neck pain and degenerative changes in the cervical spine in women, and between neck pain and obesity or metabolic syndrome. The present study investigated associations between neck pain or stiffness and lipid profiles in subjects recruited from the general population of a Japanese community. METHODS: The 1122 volunteers who participated in this study included 426 men (age 52.6 ± 15.5 years; body mass index 23...
November 22, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29167069/association-between-brain-and-low-back-pain
#12
Shin-Ichi Konno, Miho Sekiguchi
Most chronic low back pain includes elements of nociceptive pain, neuropathic pain, and nonorganic pain. We conducted screening for nonorganic pain with use of the Brief Scale for Psychiatric Problems in Orthopaedic Patients (BS-POP), which is simple and can be used for multidimensional assessment. Research on pain areas using functional magnetic resonance imaging (fMRI) and positron emission tomography has shown that the dopamine system contributes to the pathology of chronic low back pain. Chronic low back pain patients show decreased activation of the anterior cingulate cortex, prefrontal cortex, and nucleus accumbens...
November 19, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29167068/three-dimensional-morphology-of-lunate-surface-in-hip-dysplasia-theoretical-implications-for-periacetabular-osteotomy
#13
Meng Xu, Yanbing Wang, Lei Zhong, Yang Song, Jianlin Xiao, Yu Sun, Wei Li, Zhe Zhu, Xin Zhao, Jincheng Wang
BACKGROUND: The objective of this study was to evaluate three-dimensional morphology of acetabular lunate surface in patients with dysplastic hip using three-dimensional computed tomography (CT), and to compare the lunate surface morphology between the normal and dysplastic hips. METHODS: Sixty seven dysplastic hips in symptomatic patients and 61 normal hips in healthy volunteers who underwent three-dimensional CT scanning were included in this study. The size and shape of the lunate surface was measured with a fully automated imaging technique using Mimics16...
November 19, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29157629/mri-appearance-in-the-early-stage-of-legg-calv%C3%A3-perthes-disease-to-predict-lateral-pillar-classification-a-retrospective-analysis-of-the-labral-horizontalization
#14
Yasuhiro Shirai, Kenjiro Wakabayashi, Ikuo Wada, Yoshiaki Tsuboi, Myongsu Ha, Takanobu Otsuka
BACKGROUND: The Herring lateral pillar classification is widely used for the classification of Legg-Calvé-Perthes disease, but is not applied at the early stage of Legg-Calvé-Perthes disease because it is typically applied at the late fragmentation stage. The purpose of this study was to investigate the correlation between the early appearance on magnetic resonance imaging of the acetabular labrum and lateral pillar involvement in Legg-Calvé-Perthes disease. METHODS: Non-contrast magnetic resonance images of 26 hips in 25 children with early-stage Legg-Calvé-Perthes disease were retrospectively reviewed...
November 17, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29153993/the-high-frequency-of-superior-labrum-biceps-tendon-and-superior-rotator-cuff-pathologies-in-patients-with-subscapularis-tears-a-cohort-study
#15
Muhammet Baybars Ataoglu, Mehmet Cetinkaya, Mustafa Ozer, Tacettin Ayanoglu, Ulunay Kanatli
BACKGROUND: The purpose of this study was to assess the frequency of superior labrum anterior posterior (SLAP) lesions, long head of biceps tendon (LHBT) pathologies, and superior rotator cuff tears accompanying subscapularis tears. We hypothesised that LHBT lesions, superior rotator cuff tears, and especially SLAP lesions were very frequent with subscapularis tears. METHODS: The digital files of patients who underwent shoulder arthroscopy were reviewed retrospectively...
November 16, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29150193/descriptive-epidemiology-of-traumatic-spinal-injury-in-japan
#16
Mahammad Abbas Tafida, Yukiko Wagatsuma, Enbo Ma, Taro Mizutani, Toshikazu Abe
BACKGROUND: 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. METHODS: Spine injury patients were retrospectively selected from the Japan Trauma Data Bank (JTDB) from 2004 to 2013 for all ages and all spinal injuries...
November 14, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29146094/is-balloon-kyphoplasty-a-better-treatment-than-percutaneous-vertebroplasty-for-chronic-obstructive-pulmonary-disease-copd-patients-with-osteoporotic-vertebral-compression-fractures-ovcfs
#17
Xinjie Wu, Xiangsheng Tang, Mingsheng Tan, Ping Yi, Feng Yang
BACKGROUND: Although several studies reported that Balloon kyphoplasty (BK) or percutaneous vertebroplasty (PVP) could improve pulmonary functions, there is no study to compare the efficacy and safety of 2 procedures in COPD patients with osteoporotic vertebral compression fractures (OVCFs) and investigate the reason why they could improve pulmonary functions. METHOD: Two procedures, including BK and PVP were performed in 61 COPD patients with single-level OVCFS...
November 13, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29146093/treatment-status-and-radiographic-features-of-patients-with-atypical-femoral-fractures
#18
Hiroshi Hagino, Naoto Endo, Tetsuji Yamamoto, Atsushi Harada, Jun Iwamoto, Naoki Kondo, Tasuku Mashiba, Satoshi Mori, Junichi Nakamura, Seiji Ohtori, Akinori Sakai, Junichi Takada, Yoshiharu Kato
BACKGROUND: The Japanese Orthopaedic Association (JOA) has been surveying approximately 3000 orthopedic surgery hospitals and clinics with inpatient facilities nationwide to collect information on atypical femoral fractures (AFFs) and patient characteristics since 2010. The present study aims to examine radiographic images and clarify the relationship between radiographic and patient characteristics of patients with AFF and treatment status. METHODS: The study involved 1996 facilities certified as clinical training sites by the JOA and 912 clinics with inpatient facilities affiliated with the Japanese Clinical Orthopaedic Association (JCOA)...
November 13, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29146092/ultrasonographic-evaluation-of-changes-in-the-muscle-architecture-of-the-gastrocnemius-with-botulinum-toxin-treatment-for-lower-extremity-spasticity-in-children-with-cerebral-palsy
#19
Akihiro Kawano, Taiichiro Yanagizono, Ichiro Kadouchi, Tetsuya Umezaki, Etsuo Chosa
BACKGROUND: 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. METHODS: The participants included 18 children (mean age, 6.2 years) with cerebral palsy who were treated with botulinum toxin A for lower extremity spasticity and 27 healthy children (mean age, 6...
November 13, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29133217/association-between-sleep-disturbance-and-new-onset-subjective-knee-pain-in-great-east-japan-earthquake-survivors-a-prospective-cohort-study-in-the-miyagi-prefecture
#20
Yoshihiro Hagiwara, Takuya Sekiguchi, Yumi Sugawara, Yutaka Yabe, Masashi Koide, Nobuyuki Itaya, Shinichiro Yoshida, Yasuhito Sogi, Masahiro Tsuchiya, Ichiro Tsuji, Eiji Itoi
BACKGROUND: The Great East Japan Earthquake (GEJE) and Tsunami devastated the northeastern coast of Japan on March 11, 2011. This study aimed to determine whether sociopsychological factors, such as sleep disturbance and psychological distress, influenced new-onset subjective knee pain in survivors during the post-disaster phase of the GEJE. METHODS: From November 2012 to February 2013 (2 years after the GEJE) and from November 2013 to February 2014 (3 years after the GEJE), survivors (≥18 years) completed self-reported questionnaires...
November 10, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
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