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Tanaka, Kenko,Sailer, Irena,Iwama, Ryosuke,Yamauchi, Kensuke,Nogami, Shinnosuke,Yoda, Nobuhiro,Takahashi, Tetsu Korean Academy of Periodontology 2018 Journal of Periodontal & Implant Science Vol.48 No.6
Purpose: It has been suggested that resonance frequency analysis (RFA) can measure changes in the stability of dental implants during osseointegration. This retrospective study aimed to evaluate dental implant stability at the time of surgery (primary stability; PS) and secondary stability (SS) after ossseointegration using RFA, and to investigate the relationship between implant stability and cortical bone thickness. Methods: In total, 113 patients who attended the Tohoku University Hospital Dental Implant Center were included in this study. A total of 229 implants were placed in either the mandibular region (n=118) or the maxilla region (n=111), with bone augmentation procedures used in some cases. RFA was performed in 3 directions, and the lowest value was recorded. The preoperative thickness of cortical bone at the site of implant insertion was measured digitally using computed tomography, excluding cases of bone grafts and immediate implant placements. Results: The mean implant stability quotient (ISQ) was $69.34{\pm}9.43$ for PS and $75.99{\pm}6.23$ for SS. The mandibular group had significantly higher mean ISQ values than the maxillary group for both PS and SS (P<0.01). A significant difference was found in the mean ISQ values for PS between 1-stage and 2-stage surgery (P<0.5). The mean ISQ values in the non-augmentation group were higher than in the augmentation group for both PS and SS (P<0.01). A weak positive correlation was observed between cortical bone thickness and implant stability for both PS and SS in all cases (P<0.01). Conclusions: Based on the present study, the ISQ may be affected by implant position site, the use of a bone graft, and cortical bone thickness before implant therapy.
Kenko Tanaka,Irena Sailer,Ryosuke Iwama,Kensuke Yamauchi,Shinnosuke Nogami,Nobuhiro Yoda,Tetsu Takahashi 대한치주과학회 2018 Journal of Periodontal & Implant Science Vol.48 No.6
Purpose: It has been suggested that resonance frequency analysis (RFA) can measure changes in the stability of dental implants during osseointegration. This retrospective study aimed to evaluate dental implant stability at the time of surgery (primary stability; PS) and secondary stability (SS) after ossseointegration using RFA, and to investigate the relationship between implant stability and cortical bone thickness. Methods: In total, 113 patients who attended the Tohoku University Hospital Dental Implant Center were included in this study. A total of 229 implants were placed in either the mandibular region (n=118) or the maxilla region (n=111), with bone augmentation procedures used in some cases. RFA was performed in 3 directions, and the lowest value was recorded. The preoperative thickness of cortical bone at the site of implant insertion was measured digitally using computed tomography, excluding cases of bone grafts and immediate implant placements. Results: The mean implant stability quotient (ISQ) was 69.34±9.43 for PS and 75.99±6.23 for SS. The mandibular group had significantly higher mean ISQ values than the maxillary group for both PS and SS (P<0.01). A significant difference was found in the mean ISQ values for PS between 1-stage and 2-stage surgery (P<0.5). The mean ISQ values in the non-augmentation group were higher than in the augmentation group for both PS and SS (P<0.01). A weak positive correlation was observed between cortical bone thickness and implant stability for both PS and SS in all cases (P<0.01). Conclusions: Based on the present study, the ISQ may be affected by implant position site, the use of a bone graft, and cortical bone thickness before implant therapy
Factor Structure of the Targeted Inventory on Problems in Schizophrenia
Shoji Tanaka,Takanori Nagase,Takefumi Suzuki,Kensuke Nomura,Hiroyoshi Takeuchi,Shinichiro Nakajima,Hiroyuki Uchida,Gohei Yagi,Koichiro Watanabe,Masaru Mimura 대한정신약물학회 2013 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.11 No.1
Objective: The aim of this study was to explore the factor structure of a novel, 10-item rating scale, the Targeted Inventory on Problems in Schizophrenia (TIP-Sz). Determining the factor structure will be useful in the brief evaluation of medication and non-medication treatment of the disease. Methods: An exploratory factor analysis was performed on TIP-Sz scores obtained from 100 patients who met the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) criteria for schizophrenia. Results: The factor analysis extracted four factors that were deemed clinically pertinent, which we labeled: disorganization, social cooperativeness, functional capacity, and emotional state. The items exhibited cross-loadings on the first three factors (i.e.,some items loaded on more than one factor). In particular, the ‘behavioral dyscontrol and disorganization,’ ‘insight and reality testing,’ and ‘overall prognostic impression’ items had comparable cross-loadings on all of the first three factors. The emotional state factor was distinct from the other factors in that the items loading on it did not cross-load on other factors. Conclusion: The TIP-Sz scale comprises factors that are associated with the psychosocial functioning and emotional state of patients, which are important outcome parameters for successful treatment of the disease.
Analysis of Local Vibrations in the Stay Cables of the Hizen-Takashima Bridge
Kazuo Takahashi,Kensuke Tanaka,Shozo Nakamura 한국강구조학회 2008 International Journal of Steel Structures Vol.8 No.4
Local parametric vibrations of the stay cables of the Hizen-Takashima Bridge, which is currently under construction, are studied. This bridge is a composite cable-stayed bridge with a steel girder and concrete towers. The natural frequencies of the global vibration modes are obtained using a three-dimensional FEM model. Relations between global natural frequencies and the local natural frequencies of the stay cables are first demonstrated and the results are compared with other cable-stayed bridges. The local vibrations of the stay cables at the support during global motion are obtained and the properties of the local vibrations are discussed. Local parametric vibrations of the stay cables of the Hizen-Takashima Bridge, which is currently under construction, are studied. This bridge is a composite cable-stayed bridge with a steel girder and concrete towers. The natural frequencies of the global vibration modes are obtained using a three-dimensional FEM model. Relations between global natural frequencies and the local natural frequencies of the stay cables are first demonstrated and the results are compared with other cable-stayed bridges. The local vibrations of the stay cables at the support during global motion are obtained and the properties of the local vibrations are discussed.
A Modified Under-Vastus Approach for Knee Arthroplasty with Anatomical Repair of Soft Tissue
Takafumi Hiranaka,Toshikazu Tanaka,Takaaki Fujishiro,Kensuke Anjiki,Naosuke Nagata,Daiya Kitazawa,Ken Kotoura,Koji Okamoto 대한정형외과학회 2019 Clinics in Orthopedic Surgery Vol.11 No.4
The under-vastus approach (UVA) is a modification of the conventional subvastus approach for knee arthroplasty. Our modified UVA allows the muscles to be spared while offering good exposure of the operative field and facilitating anatomical repair of the capsule and fascia. A medial parapatellar incision is made and the vastus medialis fascia is incised along the same line. The muscle belly is not incised but detached from the surrounding fascia and retracted laterally. The suprapatellar pouch capsule is then laterally incised under the vastus muscles. The patella can then be easily retracted laterally and adequate exposure is possible. After the procedure, both capsule and fascia can be anatomically repaired. We use this approach for all primary arthroplasties in our practice. There has been no case in which an additional muscle incision was required, and there were no intraoperative complications. The modified UVA allows for excellent exposure of the operative field as well as muscle retention in both primary total and unicompartmental knee arthroplasties.
Guidelines for Human Interface Design of Rescue Robots
Yasuyoshi Yokokohji,Takashi Tubouchi,Akichika Tanaka,Tomoaki Yoshida,Eiji Koyangi,Fumitoshi Matsuno,Shigeo Hirose,Hiroyuki Kuwahara,Fumiaki Takemura,Takao Ino,Kensuk Takita,Naoji Shiroma,Tetsushi Kame 제어로봇시스템학회 2006 제어로봇시스템학회 국제학술대회 논문집 Vol.2006 No.10
Clinical characteristics of inflammatory bowel disease patients with immunoglobulin A nephropathy
( Ryohei Hayashi ),( Yoshitaka Ueno ),( Shinji Tanaka ),( Kana Onishi ),( Takeshi Takasago ),( Masaki Wakai ),( Toshikatsu Naito ),( Kensuke Sasaki ),( Shigehiro Doi ),( Takao Masaki ),( Kazuaki Chaya 대한장연구학회 2021 Intestinal Research Vol.19 No.4
Background/Aims: Inflammatory bowel disease (IBD) is a chronic inflammation of the gastrointestinal tract. Some patients with this condition have been reported to present with immunoglobulin A nephropathy (IgAN), a renal complication that can cause end-stage renal failure, but the frequency of this comorbidity has not been described. Thus, the aim of this study was to investigate the frequency of IgAN in patients with IBD. Methods: This study included 620 patients with IBD (338 with ulcer-ative colitis [UC] and 282 with Crohn’s disease [CD]) from the Hiroshima University Hospital outpatient department. IgAN cases were identified from medical interviews, blood examinations (serum immunoglobulin A), and urinalyses (occult blood, proteinuria). Definitive IgAN cases were diagnosed by renal biopsies, while those detected through the clinical course and test results, but not clinically recommended for renal biopsy, were defined as suspected IgAN. Results: We analyzed 427 cases meeting the inclusion criteria (220 with UC and 207 with CD). The incidence of IgAN across all patients with IBD was 3.0%. The frequency of IgAN was significantly higher in patients with CD (11/207, 5.3%) than in those with UC (2/220, 0.9%) (P< 0.01). Moreover, a significant correlation was found between CD patients with ileostomy or colostomy and a diagnosis of IgAN. Con-clusions: Patients with IBD present a high incidence of IgAN, especially those with CD who have undergone ileostomy or co-lostomy. (Intest Res 2021;19:430-437)
( Shuji Taketomi ),( Hiroshi Inui ),( Takaki Sanada ),( Kensuke Nakamura ),( Ryota Yamagami ),( Hironari Masuda ),( Sakae Tanaka ),( Takumi Nakagawa ) 대한슬관절학회 2014 대한슬관절학회지 Vol.26 No.3
Introduction: Recently, remnant-preserving anterior cruciate ligament (ACL) reconstruction has been increasingly performed to achieve revascularization, cell proliferation, and recovery of high-quality proprioception. However, poor arthroscopic visualization makes accurate socket placement during remnant-preserving ACL reconstruction difficult. This study describes a surgical technique used to create an anatomical femoral socket with a three-dimensional (3D) fluoroscopy based navigation system during technically demanding remnant-preserving ACL reconstruction. Surgical Technique: After a reference frame was attached to the femur, an intraoperative image of the distal femur was obtained, transferred to the navigation system and reconstructed into a 3D image. A navigation computer helped the surgeon visualize the entire lateral wall of the femoral notch and lateral intercondylar ridge, even when the remnant of the ruptured ACL impeded arthroscopic visualization of the bone surface. When a guide was placed, the virtual femoral tunnel overlapped the reconstructed 3D image in real time; therefore, only minimal soft tissue debridement was required. Materials and Methods: We treated 47 patients with remnant-preserving ACL reconstruction using this system. The center of the femoral socket aperture was calculated according to the quadrant technique using 3D computed tomography imaging.Results: The femoral socket locations were considered to be an anatomical footprint in accordance with previous cadaveric studies.Conclusions: The 3D fluoroscopy-based navigation can assist surgeons in creating anatomical femoral sockets during remnant-preserving ACL reconstruction.
A Survey Among Wheelchair Users Who Participated in Banie Free 2010 Trade Show
Toru Furui,Haruka Onishi,Masahiro Kagatanj,Sayaka Sako,Kensuke Hiramoto,Rie Yonezawa,Takashi Handa,Minoru Tanaka 한국재활복지공학회 2010 한국재활복지공학회 학술대회논문집 Vol.2010 No.11
Objectives of this study is to explore factors impacting their pain and discomfort, and to advocate seating ergonomics in public. We set up a seating clinic booth and conducted survey among wheelchair users at Barrie Free 2010 Trade Show held at Intec Osaka from April 15th to April 17<SUP>th</SUP> 2010.Weanalyzedtheseated posture using software "Rysis", which designed based on ISO 16840-1. Results showed pelvis and trunk asymmetry, joystick controller side, and neck pain made impact on their seated posture. With this clinical consultation process of this work, users can satisfy their interest in objective findings of their seated posture, and experience the importance of ergonomic seating.