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Kato K, Miyazawa H, Kobayashi H, Kishikawa Y, Funaki H, Noguchi N, Ooi K, Kawashiri S. The pattern and spread of invasion can predict late cervical lymph node metastasis in early tongue squamous cell carcinoma. Diagn Pathol 2023; 18:87. [PMID: 37537639 PMCID: PMC10398901 DOI: 10.1186/s13000-023-01371-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 07/06/2023] [Indexed: 08/05/2023] Open
Abstract
To determine the predictive indexes of late cervical lymph node metastasis in early tongue squamous cell carcinoma (TSCC). We retrospectively analyzed the cases of 25 patients with stage I/II TSCC who had undergone surgical treatment without elective neck dissection. We evaluated the relationships between clinicopathologic factors and the occurrence of late cervical lymph node metastasis. Of the 25 cases, metastasis to the cervical lymph nodes was observed in nine cases (36.0%). The clinicopathological factors associated with late cervical lymph node metastasis were the mode of invasion (MOI, p = 0.032), depth of invasion (DOI, p = 0.004), and perineural invasion (PNI, p = 0.040). A multivariate analysis revealed that only the DOI was an independent predictor of late cervical lymph node metastasis. The combination of the DOI and MOI or the PNI and MOI was significantly correlated with late cervical lymph node metastasis (p = 0.004 and p = 0.012, respectively). Our findings suggest that combinations of the MOI, DOI, and PNI could be used as an index for predicting late cervical lymph node metastasis in early TSCC.
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Affiliation(s)
- Koroku Kato
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, 13-1 Takara-Machi, Kanazawa, 920-8641, Japan.
| | - Hiroki Miyazawa
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, 13-1 Takara-Machi, Kanazawa, 920-8641, Japan
| | - Hisano Kobayashi
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, 13-1 Takara-Machi, Kanazawa, 920-8641, Japan
| | - Yoshiaki Kishikawa
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, 13-1 Takara-Machi, Kanazawa, 920-8641, Japan
| | - Hayato Funaki
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, 13-1 Takara-Machi, Kanazawa, 920-8641, Japan
| | - Natsuyo Noguchi
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, 13-1 Takara-Machi, Kanazawa, 920-8641, Japan
| | - Kazuhiro Ooi
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, 13-1 Takara-Machi, Kanazawa, 920-8641, Japan
| | - Shuichi Kawashiri
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, 13-1 Takara-Machi, Kanazawa, 920-8641, Japan
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Jokaji R, Ooi K, Yahata T, Nakade Y, Kawashiri S. Evaluation of factors related to morphological masseter muscle changes after preoperative orthodontic treatment in female patients with skeletal class III dentofacial deformities. BMC Oral Health 2022; 22:292. [PMID: 35843934 PMCID: PMC9288706 DOI: 10.1186/s12903-022-02319-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 07/06/2022] [Indexed: 12/01/2022] Open
Abstract
Background The purpose of the current study was to investigate factors related to morphological changes in the masseter muscle after preoperative orthodontic treatment in patients with skeletal class III dentofacial deformities for analysis of muscle changes and malocclusions. Methods Twenty female patients with dentofacial deformities were included in the study. Computed tomography was performed before and after preoperative orthodontic treatment, and the lengths, widths, and cross-sectional areas of the masseter muscles were measured. Changes in these parameters were evaluated, and factors related to changes in masseter muscle area after preoperative orthodontic treatment were analyzed. Results The lengths, widths, and areas of masseter muscles were significantly smaller after preoperative orthodontic treatment. Smaller masseter muscle area was significantly associated with changes in overbite and pretreatment values of SNA angle. Conclusions Atrophy of the masseter muscle during preoperative orthodontic treatment was greater in patients with increased open bite due to improved dental compensation in patients with skeletal class III dentofacial deformities with maxillary retraction.
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Ooi K, Aihara M, Matsumura H, Matsuda S, Watanabe Y, Yuasa H, Matsuka Y. Therapy outcome measures in temporomandibular disorder: a scoping review. BMJ Open 2022; 12:e061387. [PMID: 35985779 PMCID: PMC9396127 DOI: 10.1136/bmjopen-2022-061387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVES Therapy outcome measures (TOMs) in temporomandibular disorders (TMDs) have not been systematically evaluated. We systematically explored the main TOM assessment methods for TMD TOMs used in previous studies. DESIGN Scoping review. DATA SOURCES According to Preferred Reporting Items for Systematic reviews and Meta-Analysis extension for Scoping Review reporting guidelines, we systematically searched five key databases (MEDLINE/PubMed, Web of Science, Embase, Epistemonikos and ClinicalTrials) and thoroughly scanned relevant grey literature using Medical Subject Headings, Emtree and index terms. ELIGIBILITY CRITERIA We considered primary research papers published from January 2010 to December 2020 that included patients with TMD aged ≥18 years, diagnosed according to the Diagnostic Criteria for Temporomandibular Disorders. DATA EXTRACTION AND SYNTHESIS Four reviewers extracted general information and information on study design and setting, target, interventions, and outcome type. RESULTS One hundred and seventy-two of the 3726 screened articles (3704 by search engines and 22 manually) were included. The TOMs analysed included pain (n=161 articles), maximal mouth opening (MMO) (91), jaw function (32), jaw movement (26), joint sound (16), quality of life (QOL) (15), depression/anxiety (14), oral QOL (10) or others (30). Evaluation periods were <4 weeks (111), <8 weeks (62), <12 weeks (59), >12 weeks (75) or 'not mentioned' (12). Pain outcomes (229) included general pain (115), tenderness (45), pain during functioning (44), resting pain (16) and others (8). Pain outcome evaluation methods included Visual Analogue Scale (VAS; 121), Numerical Rating Scale (21) and other methods (21). Pain outcome indicators were binary (10) or continuous (158); only five studies reported the least significant difference in treatment efficacy. MMO evaluation using painless methods (19) and jaw function evaluation using methods assessing mandibular movement range (23) were the most frequent. CONCLUSIONS TMD TOMs are diverse; the major outcomes were pain, MMO, jaw function and jaw movement. Most pain outcomes are evaluated by VAS Score changes.
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Affiliation(s)
- Kazuhiro Ooi
- Department of Oral and Maxillofacial Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | | | - Hidehisa Matsumura
- Matsumura Dental Clinic, Fukuoka, Japan
- Faculty of Dental Science, Division of Oral Rehabilitation, Section of Implant and Rehabilitative Dentistry, Kyushu University, Fukuoka, Japan
| | - Shinpei Matsuda
- Department of Dentistry and Oral Surgery, Unit of Sensory and Locomotor Medicine, Division of Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Yuki Watanabe
- Division of Temporomandibular Disorders and Orofacial Pain, Department of Special Needs Dentistry, Showa University Graduate School of Dentistry, Tokyo, Japan
| | - Hidemichi Yuasa
- Oral and Maxillofacial Surgery, Toyohashi Medical Center, Toyohashi, Japan
| | - Yoshizo Matsuka
- Department of Stomatognathic Function and Occlusal Reconstruction, Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Japan
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Ide K, Takahashi S, Sakai K, Taga Y, Ueno T, Dickens D, Jenkins R, Falciani F, Sasaki T, Ooi K, Kawashiri S, Mizuno K, Hattori S, Sakai T. The dipeptide prolyl-hydroxyproline promotes cellular homeostasis and lamellipodia-driven motility via active β1-integrin in adult tendon cells. J Biol Chem 2021; 297:100819. [PMID: 34029590 PMCID: PMC8239475 DOI: 10.1016/j.jbc.2021.100819] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 05/08/2021] [Accepted: 05/20/2021] [Indexed: 12/14/2022] Open
Abstract
Collagen-derived hydroxyproline (Hyp)-containing peptides have a variety of biological effects on cells. These bioactive collagen peptides are locally generated by the degradation of endogenous collagen in response to injury. However, no comprehensive study has yet explored the functional links between Hyp-containing peptides and cellular behavior. Here, we show that the dipeptide prolyl-4-hydroxyproline (Pro-Hyp) exhibits pronounced effects on mouse tendon cells. Pro-Hyp promotes differentiation/maturation of tendon cells with modulation of lineage-specific factors and induces significant chemotactic activity in vitro. In addition, Pro-Hyp has profound effects on cell proliferation, with significantly upregulated extracellular signal-regulated kinase phosphorylation and extracellular matrix production and increased type I collagen network organization. Using proteomics, we have predicted molecular transport, cellular assembly and organization, and cellular movement as potential linked-network pathways that could be altered in response to Pro-Hyp. Mechanistically, cells treated with Pro-Hyp demonstrate increased directional persistence and significantly increased directed motility and migration velocity. They are accompanied by elongated lamellipodial protrusions with increased levels of active β1-integrin-containing focal contacts, as well as reorganization of thicker peripheral F-actin fibrils. Pro-Hyp-mediated chemotactic activity is significantly reduced (p < 0.001) in cells treated with the mitogen-activated protein kinase kinase 1/2 inhibitor PD98059 or the α5β1-integrin antagonist ATN-161. Furthermore, ATN-161 significantly inhibits uptake of Pro-Hyp into adult tenocytes. Thus, our findings document the molecular basis of the functional benefits of the Pro-Hyp dipeptide in cellular behavior. These dynamic properties of collagen-derived Pro-Hyp dipeptide could lead the way to its application in translational medicine.
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Affiliation(s)
- Kentaro Ide
- Department of Pharmacology and Therapeutics, MRC Centre for Drug Safety Science, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
| | - Sanai Takahashi
- Department of Pharmacology and Therapeutics, MRC Centre for Drug Safety Science, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
| | - Keiko Sakai
- Department of Pharmacology and Therapeutics, MRC Centre for Drug Safety Science, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
| | - Yuki Taga
- Nippi Research Institute of Biomatrix, Toride, Ibaraki, Japan
| | - Tomonori Ueno
- Nippi Research Institute of Biomatrix, Toride, Ibaraki, Japan
| | - David Dickens
- Department of Pharmacology and Therapeutics, MRC Centre for Drug Safety Science, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
| | - Rosalind Jenkins
- Department of Pharmacology and Therapeutics, MRC Centre for Drug Safety Science, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
| | - Francesco Falciani
- Department of Biochemistry and Systems Biology, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
| | - Takako Sasaki
- Department of Biochemistry, Faculty of Medicine, Oita University, Oita, Japan
| | - Kazuhiro Ooi
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa, Japan
| | - Shuichi Kawashiri
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa, Japan
| | - Kazunori Mizuno
- Nippi Research Institute of Biomatrix, Toride, Ibaraki, Japan
| | - Shunji Hattori
- Nippi Research Institute of Biomatrix, Toride, Ibaraki, Japan
| | - Takao Sakai
- Department of Pharmacology and Therapeutics, MRC Centre for Drug Safety Science, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK.
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Ide K, Ooi K, Takamichi S, Jokaji R, Kobayashi Y, Kasahara K, Nakata M, Kawashiri S. Factors related to oxygen desaturation index during sleep 7 days after bilateral sagittal splitting ramus osteotomy in patients without previous obstructive sleep apnea. Oral Maxillofac Surg 2021; 26:123-130. [PMID: 33993405 DOI: 10.1007/s10006-021-00972-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 05/10/2021] [Indexed: 11/25/2022]
Abstract
PURPOSE The incidence of obstructive sleep apnea (OSA) immediately after surgery in patients with dentofacial deformities without previous OSA remains unknown. We aimed to perioperatively evaluate factors associated with oxygen desaturation index (ODI) during sleep, 7 days after bilateral splitting ramus osteotomy (BSSRO) in patients without previous OSA. METHODS Fifty-one patients (15 males, 36 females) with dentofacial deformities, scheduled to undergo BSSRO, were included. Polysomnography was performed before orthognathic surgery. Perioperative OSA was evaluated with peripheral arterial tonometry on the day of surgery and 1, 2, 3, 4, and 7 days postoperatively. Rapid eye movement (REM) sleep periods and the ODI were measured. Factors associated with perioperative ODI after surgery were statistically analyzed. RESULTS REM sleep periods were significantly decreased on the day of surgery and significantly increased at 4 and 7 days postoperatively, compared to the preoperative period. ODI increased on the day of surgery, decreased after 1 day, and increased again at 4 and 7 days postoperatively. ODI on the day of surgery was significantly increased due to increased preoperative ODI, overjet, and SN-MP angle and decreased SNA and SNB angle. ODI at 7 days postoperatively was significantly increased due to increased REM sleep periods and decreased SN-MP and gonial angle. ODI was increased in response to REM sleep periods 7 days after BSSO. CONCLUSION Airway management in patients with dentofacial deformity should be given more attention by preoperative assessment for OSA, even in the absence of previous OSA, until 7 days postoperatively due to REM rebound.
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Affiliation(s)
- Kentaro Ide
- Department of Oral and Maxillofacial Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Kazuhiro Ooi
- Department of Oral and Maxillofacial Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa, 920-8641, Japan.
| | - Sayuri Takamichi
- Department of Clinical Laboratory, Graduate School of Medicine, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa, Japan
| | - Rei Jokaji
- Department of Oral and Maxillofacial Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Yutaka Kobayashi
- Department of Oral and Maxillofacial Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Kazuo Kasahara
- Department of Respiratory Medicine, Graduate School of Medicine, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa, Japan
| | - Masako Nakata
- Department of Clinical Laboratory, Graduate School of Medicine, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa, Japan
| | - Shuichi Kawashiri
- Department of Oral and Maxillofacial Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa, 920-8641, Japan
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Yamashita-Futani Y, Jokaji R, Ooi K, Kobayashi K, Kanakis I, Liu K, Kawashiri S, Bou-Gharios G, Nakamura H. Metalloelastase-12 is involved in the temporomandibular joint inflammatory response as well as cartilage degradation by aggrecanases in STR/Ort mice. Biomed Rep 2021; 14:51. [PMID: 33859822 PMCID: PMC8042671 DOI: 10.3892/br.2021.1427] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Accepted: 03/17/2021] [Indexed: 12/02/2022] Open
Abstract
Temporomandibular joint dysfunction (TMJD) is characterised by clinical symptoms involving both the masticatory muscles and the temporomandibular joint (TMJ). Disc internal derangement and osteoarthritis (OA) are the most common forms of TMJD. Currently, the molecular process associated with degenerative changes in the TMJ is unclear. Our previous study showed that elastin-digested peptides act on human TMJ synovial cells and lead to upregulation of interleukin-6 (IL-6) and metalloelastase-12 (MMP-12; an elastin-degrading enzyme) in vitro. However, there is limited information regarding the involvement of elastin-degradation by MMP-12 in the processes of inflammatory responses and cartilage degradation in vivo. STR/Ort mice were used as a model of TMJ OA in the present study. Significant articular cartilage degeneration was observed starting at 20 weeks of age in the STR/Ort mice and this progressed gradually until 40 weeks, compared with the age-matched CBA mice. Immunostaining analysis showed that MMP-12 and IL-6 were expressed in the chondrocytes in the superficial zones of the cartilage. Immunostaining also showed that aggrecanases [a disintegrin and metalloproteinase with thrombospondin motifs (ADAMTS)-4 and ADAMTS-5] were expressed in the chondrocytes in the superficial zones of the cartilage. These findings suggest that an inflammatory and degradative process was initiated in the TMJ. Harmful mechanical stimuli, particularly pressure, may cause damage to the elastin fibres in the most elastin-rich superficial layer of the articular cartilage. Elastin-digested peptides are then generated as endogenous warning signals and they initiate a pro-inflammatory cascade. This leads to upregulation of pro-inflammatory mediators, such as IL-6 and MMP-12, which further trigger tissue damage resulting in elevated levels of elastin-digested peptides. IL-6 increases expression of the aggrecanases ADAMTS-4 and ADAMTS-5, following cartilage degradation. This leads to the establishment of a positive feedback loop and may result in chronic inflammation and cartilage degradation of the TMJ in vivo.
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Affiliation(s)
- Yoko Yamashita-Futani
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan
| | - Rei Jokaji
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan
| | - Kazuhiro Ooi
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan
| | - Kazuhiko Kobayashi
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan
| | - Ioannis Kanakis
- Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool L7 8TX, UK
| | - Ke Liu
- Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool L7 8TX, UK
| | - Shuichi Kawashiri
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan
| | - George Bou-Gharios
- Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool L7 8TX, UK
| | - Hiroyuki Nakamura
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan.,Department of Oral and Maxillofacial Surgery, Ryukyu University Graduate School of Medical Science, Nishihara, Okinawa 903-0215, Japan
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Ooi K, Inoue N, Matsushita K, Yamaguchi H, Mikoya T, Kawashiri S, Tei K. Body Weight Loss After Orthognathic Surgery: Comparison Between Postoperative Intermaxillary Fixation with Metal Wire and Elastic Traction, Factors Related to Body Weight Loss. J Maxillofac Oral Surg 2021; 20:95-99. [PMID: 33584049 PMCID: PMC7855110 DOI: 10.1007/s12663-019-01318-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 12/10/2019] [Indexed: 11/24/2022] Open
Abstract
INTRODUCTION The aim of this study was to compare body weight loss between postoperative intermaxillary fixation with metal wire and elastic traction and to investigate factors related to body weight loss after orthognathic surgery. MATERIALS AND METHODS Subjects were 59 patients with dentofacial deformity, comprising 31 patients treated with intermaxillary fixation (IMF) and 28 patients treated with elastic traction without IMF (ELT) just after surgery. Body weight loss was measured at 1 week (T1) and 2 weeks (T2) after surgery. Body weight loss was compared between IMF and ELT, and factors related to body weight loss were statistically analyzed. RESULTS Body weight loss ratio was significantly increased in IMF (2.6%) rather than in ELT (1.4%) at T1, but only tended to be increased in both groups at T2, showing no statistical difference. Body weight loss ratio was significantly increased at T2 compared to T1 in both groups. Body weight loss was significantly greater at T2 than at T1. CONCLUSION Both IMF and ELT cause body weight loss after orthognathic surgery, but IMF causes body weight loss earlier than ELT and increased early body weight loss increases continuous body weight loss after orthognathic surgery.
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Affiliation(s)
- K. Ooi
- Department of Oral and Maxillofacial Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa 920-8641 Japan
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido 060-8586 Japan
| | - N. Inoue
- Gerodontology, Department of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido 060-8586 Japan
| | - K. Matsushita
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido 060-8586 Japan
| | - H. Yamaguchi
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido 060-8586 Japan
| | - T. Mikoya
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido 060-8586 Japan
| | - S. Kawashiri
- Department of Oral and Maxillofacial Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa 920-8641 Japan
| | - K. Tei
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido 060-8586 Japan
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Sato T, Magennis P, Ooi K, Ide K. Organising an international speciality conference – check list. Br J Oral Maxillofac Surg 2020. [DOI: 10.1016/j.bjoms.2020.10.203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Shirazawa Y, Iwasaki T, Ooi K, Kobayashi Y, Yanagisawa‐Minami A, Oku Y, Yokura A, Ban Y, Suga H, Kawashiri S, Yamasaki Y. Cover image. Orthod Craniofac Res 2020. [DOI: 10.1111/ocr.12407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ooi K, Inoue N, Matsushita K, Yamaguchi HO, Mikoya T, Kawashiri S, Tei K. Comparison of Maximum Mouth Opening Following Mandibular Bilateral Sagittal Splitting Ramus osteotomies in Class III Females Using Two Different Osteosynthesis Methods. J Oral Rehabil 2020; 47:1242-1246. [PMID: 32706400 DOI: 10.1111/joor.13059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 06/01/2020] [Accepted: 07/13/2020] [Indexed: 11/28/2022]
Abstract
BACKGROUND Limitation of mouth opening is a common complaint following orthognathic surgery. OBJECTIVES This investigation reports on the progress of maximum incisal opening following orthognathic surgery and compares the impact of two different osteosynthesis methods on mouth opening in female patients with Class III dentofacial deformities. METHODS Forty cases of skeletal class III malocclusion were divided into twenty cases treated using the conventional single miniplate osteosynthesis method (P1) and twenty cases using the additional L-shaped miniplate osteosynthesis method (P2). No significant differences in pre-operative clinical status were detected between the P1 and P2 group, and all patients were managed with elastics in the post-operative period. Independent mouth opening exercises were initiated seven days after surgery, and inter-incisal distance was measured as maximum mouth opening (MMO) at 1 week, 2 weeks, and 1, 2, 3, 6 months. Statistical analysis was performed in order to analyse differences in MMO between the P1 and P2 groups (Prism 7 GraphPad software, San Diego, CA). Values of P < .05 were considered to be significant. RESULTS MMO significantly increased from 2 weeks after surgery in both groups. The MMO of P2 was significantly larger than that of P1 in all experimental periods after surgery. MMO was statistically improved in P2 at 2 months after surgery, while MMO in P1 was significantly smaller than the pre-operative MMO, even at 6 months post-operative. A minimum MMO of 40 mm was achieved by all patients. CONCLUSION L-shaped miniplate osteosynthesis was more useful for early limitation of mandibular opening improvement than conventional single miniplate osteosynthesis.
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Affiliation(s)
- Kazuhiro Ooi
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan.,Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | - Nobuo Inoue
- Gerodontology, Department of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Kazuhiro Matsushita
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Hiro-O Yamaguchi
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tadashi Mikoya
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Shuichi Kawashiri
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | - Kanchu Tei
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
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Ooi K, Inoue N, Matsushita K, Mikoya T, Minowa K, Kawashiri S, Tei K. Relations between anterior disc displacement and maxillomandibular morphology in skeletal anterior open bite with changes to the mandibular condyle. Br J Oral Maxillofac Surg 2020; 58:1084-1090. [PMID: 32654798 DOI: 10.1016/j.bjoms.2020.05.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 05/15/2020] [Indexed: 10/23/2022]
Abstract
In this study we investigated the relation between anterior disc displacement (ADD) and maxillomandibular morphology in skeletal anterior open bite with changes to the mandibular condyle. Thirty female patients (60 joints) with both conditions were evaluated. Magnetic resonance imaging of the temporomandibular joint (TMJ) was used to diagnose both ADD and changes to the mandibular condyle (erosion, osteophyte, and deformity). The relations among ADD, changes to the mandibular condyle, and maxillomandibular morphology were examined statistically. Changes to the mandibular condyle had a higher score than sym anterior open bite, the deviated side in asymmetric anterior open bite, and the non-deviated side. The score for disc displacement on the non-deviated side was lower than both the sym side and the deviated side. Unilateral changes to the mandibular condyle and unilateral disc displacement were not apparent in sym anterior open bite, but a unilateral non-displaced disc was seen only on the asymmetric side. Mandibular condylar changes were significantly more common on the deviated, than on the non-deviated, side. The SNB angle was significantly smaller, and the ANB, GZN, and SN-mandibular plane angles were significantly larger in sym anterior open bite. Overjet, ANB angle, GZN angle, and SN-MP angle were significantly larger, and the SNB angle was significantly smaller, in the presence of ADD without reduction and mandibular condylar deformity. We conclude that the prevalence of ADD without reduction and changes to the mandibular condyle were related to mandibular asymmetry and mandibular morphology in anterior open bite. This retrospective study suggests that ADD without reduction and mandibular condylar bone changes may be related to the progression of skeletal class II open bite and mandibular asymmetry in cases of skeletal open bite.
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Affiliation(s)
- K Ooi
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 kita-ku, Sapporo, Hokkaido 060-8586, Japan; Department of Oral and Maxillofacial Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa, 920-8641, Japan.
| | - N Inoue
- Gerodontology, Department of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido 060-8586, Japan
| | - K Matsushita
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 kita-ku, Sapporo, Hokkaido 060-8586, Japan
| | - T Mikoya
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 kita-ku, Sapporo, Hokkaido 060-8586, Japan
| | - K Minowa
- Dental Radiology, Department of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 kita-ku, Sapporo, Hokkaido 060-8586, Japan
| | - S Kawashiri
- Department of Oral and Maxillofacial Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa, 920-8641, Japan
| | - K Tei
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 kita-ku, Sapporo, Hokkaido 060-8586, Japan
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12
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Shirazawa Y, Iwasaki T, Ooi K, Kobayashi Y, Yanagisawa-Minami A, Oku Y, Yokura A, Ban Y, Suga H, Kawashiri S, Yamasaki Y. Relationship between pharyngeal airway depth and ventilation condition in mandibular setback surgery: A computational fluid dynamics study. Orthod Craniofac Res 2020; 23:313-322. [PMID: 32056328 DOI: 10.1111/ocr.12371] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 02/07/2020] [Accepted: 02/10/2020] [Indexed: 12/27/2022]
Abstract
OBJECTIVES This study aimed to determine the anteroposterior depth (APD) of the pharyngeal airway (PA) where post-operative PA obstruction was predicted, using computer fluid dynamics (CFD), in order to prevent obstructive sleep apnoea after mandibular setback surgery. SETTINGS AND SAMPLE POPULATION Nineteen skeletal Class III patients (8 men; mean age, 26.7 years) who required mandibular setback surgery had computed tomography images taken before and 6 months after surgery. METHODS The APD of each site of the four cross-sectional reference planes (retropalatal airway [RA], second cervical vertebral airway, oropharyngeal airway and third cervical vertebral airway) were measured. The Maximum negative pressure (Pmax) of the PA was measured at inspiration using CFD, based on a three-dimensional PA model. Intersite differences were determined using analysis of variance and the Friedman test with Bonferroni correction. The relationship between APD and Pmax was evaluated by Spearman correlation coefficients and non-linear regression analysis. RESULTS The smallest PA site was the RA. Pmax was significantly correlated with the APD of the RA (rs = .628, P < .001). The relationship between Pmax and the APD-RA was fitted to a curve, which showed an inversely proportional relationship of Pmax to the square of the APD-RA. Pmax substantially increased even with a slight reduction of the APD-RA. In particular, when the APD-RA was 7 mm or less, Pmax increased greatly, suggesting that PA obstruction was more likely to occur. CONCLUSIONS The results of this study suggest that APD-RA is a useful predictor of good PA ventilation after surgery.
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Affiliation(s)
- Yoshito Shirazawa
- Department of Pediatric Dentistry, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima-City, Japan
| | - Tomonori Iwasaki
- Department of Pediatric Dentistry, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima-City, Japan
| | - Kazuhiro Ooi
- Department of Oral and Maxillofacial Surgery, School of Medical Science, Kanazawa University Graduate, Kanazawa-City, Japan
| | - Yutaka Kobayashi
- Department of Oral and Maxillofacial Surgery, School of Medical Science, Kanazawa University Graduate, Kanazawa-City, Japan
| | - Ayaka Yanagisawa-Minami
- Department of Pediatric Dentistry, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima-City, Japan
| | - Yoichiro Oku
- Department of Pediatric Dentistry, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima-City, Japan
| | - Anna Yokura
- Department of Pediatric Dentistry, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima-City, Japan
| | - Yuusuke Ban
- Department of Pediatric Dentistry, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima-City, Japan
| | - Hokuto Suga
- Department of Pediatric Dentistry, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima-City, Japan
| | - Shuichi Kawashiri
- Department of Oral and Maxillofacial Surgery, School of Medical Science, Kanazawa University Graduate, Kanazawa-City, Japan
| | - Youichi Yamasaki
- Department of Pediatric Dentistry, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima-City, Japan
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13
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Ooi K, Inoue N, Matsushita K, Yamaguchi HO, Mikoya T, Kawashiri S, Tei K. Factors related to patients' nutritional state after orthognathic surgery. Oral Maxillofac Surg 2019; 23:481-486. [PMID: 31686250 DOI: 10.1007/s10006-019-00801-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Accepted: 09/11/2019] [Indexed: 11/28/2022]
Abstract
PURPOSE The purpose of this study was to evaluate patients' nutritional state after orthognathic surgery. METHODS The subjects were 40 female patients with dentofacial deformity aged 17-33 years who were undergoing bilateral sagittal splitting ramus osteotomy. Twenty patients were treated with intermaxillary fixation, and 20 patients were treated without intermaxillary fixation. Age and body mass index (kg/m2) were assessed as physical factors, operation time, blood loss, and amount of mandibular movement with or without intermaxillary fixation were assessed as operation stress factors, and the following laboratory data, total protein, serum albumin, total cholesterol, total lymphocytes, and cholinesterase were assessed as nutritional state factors at 1 and 2 weeks after surgery. Statistical analysis was performed for body weight loss and relationship between body weight loss and examination factors. RESULTS Body weight significantly decreased 2.3% at 1 week and 3.9% at 2 weeks after surgery rather than preoperation. All laboratory data except total lymphocyte were decreased at 1 week after surgery and still remained significantly decreased at 2 weeks after surgery. There was a statistically significant relationship between body weight loss at 1 week after surgery and operation time. CONCLUSIONS These results indicate that long operation time caused body weight loss in orthognathic surgery.
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Affiliation(s)
- Kazuhiro Ooi
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido, 060-8586, Japan. .,Department of Oral and Maxillofacial Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa, 920-8641, Japan.
| | - Nobuo Inoue
- Gerodontology, Department of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido, 060-8586, Japan
| | - Kazuhiro Matsushita
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido, 060-8586, Japan
| | - Hiro-O Yamaguchi
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido, 060-8586, Japan
| | - Tadashi Mikoya
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido, 060-8586, Japan
| | - Shuichi Kawashiri
- Department of Oral and Maxillofacial Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Kanchu Tei
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido, 060-8586, Japan
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14
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Ooi K, Inoue N, Matsushita K, Yamaguchi HO, Mikoya T, Kawashiri S, Tei K. Comparison of Postoperative Stability Between BSSRO and Le Fort 1 Osteotomy with BSSRO in Skeletal Class III Malocclusion with Severe Open Bite. J Maxillofac Oral Surg 2019; 19:591-595. [PMID: 33071508 DOI: 10.1007/s12663-019-01300-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 10/12/2019] [Indexed: 10/25/2022] Open
Abstract
Introduction We aimed to investigate postoperative stability after orthognathic surgery in patients with skeletal class III malocclusion with severe open bite by comparison between bilateral sagittal splitting osteotomy (BSSRO) and BSSRO with Le Fort 1 osteotomy. Materials and methods Seventeen patients with skeletal class III malocclusion with severe open bite who were needed more than 6 degree counterclockwise rotation of distal segment by only BSSRO in preoperative cephalometric prediction. The subjects were divided into group A, where 9 patients were treated by BSSRO, and group B, where 8 patients were treated by BSSRO with Le Fort 1 osteotomy. Patient's characteristics of age, gender, preoperative over jet (OJ) and over bite (OB) were not found to be significantly different between the two groups. Counterclockwise rotation of distal segment in preoperative cephalometric prediction by only BSSRO was not found to be significantly different between group A of 7.6 (6-10.6) degree and group B of 9 (6-13) degree. The amount of rotation was reduced to 5.4 (3-10) degree by bimaxillary surgery using BSSRO and Le Fort 1 osteotomy in group B. OJ and OB were measured as occlusal stability factor. Distance between ANS-to-PNS plane and the edge of upper incisor (NF-U1Ed), and distance between Menton and edge of lower incisor (Me-L1Ed) were measured as skeletal stability factor using cephalometric analysis. These lengths were measured at pre-surgery (T0), 2 weeks after surgery (T1) and 1 year after surgery (T2), and these differences between the two groups were statistically analyzed. Results OJ and OB kept a good relation at any experimental periods. The change of Me-L1Ed was significantly larger in group A (1.21 mm at T0-T1, 1.02 mm at T0-T2) than in group B (0.14 mm at T0-T1, 0.16 mm at T0-T2). The change of NF-U1Ed was not significantly different between group A (1.07 mm at T0-T1, 0.57 mm at T0-T2) and group B (0.51 mm at T0-T1, - 0.05 mm at T0-T2). Conclusion In case with more than 6 degree counterclockwise rotation of distal segment, skeletal stability was better after bimaxillary surgery than only BSSRO; however, OJ and OB kept a good relation.
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Affiliation(s)
- Kazuhiro Ooi
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido 060-8586 Japan.,Department of Oral and Maxillofacial Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa 920-8641 Japan
| | - Nobuo Inoue
- Gerodontology, Department of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido 060-8586 Japan
| | - Kazuhiro Matsushita
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido 060-8586 Japan
| | - Hiro-O Yamaguchi
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido 060-8586 Japan
| | - Tadashi Mikoya
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido 060-8586 Japan
| | - Shuichi Kawashiri
- Department of Oral and Maxillofacial Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa 920-8641 Japan
| | - Kanchu Tei
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido 060-8586 Japan
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15
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Nakano T, Suenari K, Suruga K, Takemoto H, Hashimoto Y, Tomomori S, Higaki T, Ooi K, Dai K, Nakama Y, Kawase T, Nishioka K, Otsuka M, Masaoka Y, Shiode N. P4760New minimally invasive and tailor-made strategy for cryoballoon ablation in patients with paroxysmal atrial fibrillation. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.1136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Currently, cryoballoon ablation (CBA) has proven to be highly effective in achieving free from atrial fibrillation (AF), especially paroxysmal AF. However, the optimal freezing protocol for each patient to achieve successful pulmonary vein isolation by only CBA is still uncertain. The aim of this study was to evaluate the clinical implications of a reduction in the freezing duration (<180s) during CBA guided by the time to target temperature.
Methods
From November 2015 to August 2018, 286 consecutive paroxysmal AF patients undergoing CBA were enrolled. We compared 107 patients undergoing a tailor-made CBA procedure (Group A; August 2017-August 2018) to 179 patients with a standard CBA procedure (Group B; November 2015–July 2017). In Group A, the freezing duration was reduced to 150s when the temperature reached ≤−40°C within 40s. Furthermore, we reduced it to 120s when it reached ≤−50°C within 60s. In the other patients, the freezing time was 180s except for excessive freezing over −60°C and/or emergent situations while monitoring the esophageal temperature and for phrenic nerve injury as in Group B.
Results
The baseline clinical characteristics were similar between two groups. In Group A, 89 patients (83%) underwent CBA with a reduction in the freezing time. The rate of having reduction time in left inferior PV (LIPV) and right inferior PV (RIPV) was lower compared with left superior PV (LSPV) and right superior PV (RSPV) (respectively 17%, 29%, 56%, and 63.5%). However, for right inferior PV, in 31 patients having the reduced freezing time, none of them required touch-up ablation. Although the procedure time and frequency of touch-up ablation did not differ between the 2 groups, total freezing time for each PV was significantly shorter in Group A than Group B as shown in figure (LSPV: 164±28s vs. 216±67s; p<0.001, LIPV: 187±44s vs. 218±69s; p<0.001, RSPV: 147±31s vs. 192±51s; p<0.001, RIPV: 180±50 vs. 218±73s; p<0.001). The AF free survival rate during the follow-up period (356±167 days) was similar between the 2 groups (log-rank test, p=0.38). Furthermore, the complication rate was similar 2 groups.
The freezing time for each PV
Conclusion
The safety and efficacy of the new tailor-made CBA strategy were non-inferior to the standard procedure. This study showed that the unnecessary freezing time could be reduced in most of paroxysmal AF patients.
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Affiliation(s)
- T Nakano
- Hiroshima City Hospital, Hiroshima, Japan
| | - K Suenari
- Hiroshima City Hospital, Hiroshima, Japan
| | - K Suruga
- Hiroshima City Hospital, Hiroshima, Japan
| | - H Takemoto
- Hiroshima City Hospital, Hiroshima, Japan
| | | | - S Tomomori
- Hiroshima City Hospital, Hiroshima, Japan
| | - T Higaki
- Hiroshima City Hospital, Hiroshima, Japan
| | - K Ooi
- Hiroshima City Hospital, Hiroshima, Japan
| | - K Dai
- Hiroshima City Hospital, Hiroshima, Japan
| | - Y Nakama
- Hiroshima City Hospital, Hiroshima, Japan
| | - T Kawase
- Hiroshima City Hospital, Hiroshima, Japan
| | - K Nishioka
- Hiroshima City Hospital, Hiroshima, Japan
| | - M Otsuka
- Hiroshima City Hospital, Hiroshima, Japan
| | - Y Masaoka
- Hiroshima City Hospital, Hiroshima, Japan
| | - N Shiode
- Hiroshima City Hospital, Hiroshima, Japan
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16
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Akiyama Y, Matoba T, Uwatoku T, Mukai Y, Hayashidani S, Ooi K, Tsutsui H. P5532Biodegradable polymer drug-eluting stents are associated with better coronary endothelial function in stented vessels compared with non-target vessels in patients after coronary stenting. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Y Akiyama
- Kyushu University Graduate School of Medical Sciences, Cardiology, Fukuoka, Japan
| | - T Matoba
- Kyushu University Graduate School of Medical Sciences, Cardiology, Fukuoka, Japan
| | - T Uwatoku
- Kyushu University Hospital, Cardiology, Fukuoka, Japan
| | - Y Mukai
- Kyushu University Hospital, Cardiology, Fukuoka, Japan
| | - S Hayashidani
- Kyushu University Hospital, Cardiology, Fukuoka, Japan
| | - K Ooi
- Kyushu University Hospital, Cardiology, Fukuoka, Japan
| | - H Tsutsui
- Kyushu University Graduate School of Medical Sciences, Cardiology, Fukuoka, Japan
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17
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Suruga K, Dai K, Kobayashi Y, Ikegami Y, Nakao Y, Takemoto H, Higaki T, Ooi K, Kawase T, Nakama Y, Suenari K, Nishioka K, Otsuka M, Masaoka Y, Shiode N. P2275Are cholesterol crystals findings predictors for progression of non-culprit coronary plaque after acute myocardial infarction? (From optical coherence tomography study). Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- K Suruga
- Hiroshima City Hospital, Cardiology, Hiroshima, Japan
| | - K Dai
- Hiroshima City Hospital, Cardiology, Hiroshima, Japan
| | - Y Kobayashi
- Hiroshima City Hospital, Cardiology, Hiroshima, Japan
| | - Y Ikegami
- Hiroshima City Hospital, Cardiology, Hiroshima, Japan
| | - Y Nakao
- Hiroshima City Hospital, Cardiology, Hiroshima, Japan
| | - H Takemoto
- Hiroshima City Hospital, Cardiology, Hiroshima, Japan
| | - T Higaki
- Hiroshima City Hospital, Cardiology, Hiroshima, Japan
| | - K Ooi
- Hiroshima City Hospital, Cardiology, Hiroshima, Japan
| | - T Kawase
- Hiroshima City Hospital, Cardiology, Hiroshima, Japan
| | - Y Nakama
- Hiroshima City Hospital, Cardiology, Hiroshima, Japan
| | - K Suenari
- Hiroshima City Hospital, Cardiology, Hiroshima, Japan
| | - K Nishioka
- Hiroshima City Hospital, Cardiology, Hiroshima, Japan
| | - M Otsuka
- Hiroshima City Hospital, Cardiology, Hiroshima, Japan
| | - Y Masaoka
- Hiroshima City Hospital, Cardiology, Hiroshima, Japan
| | - N Shiode
- Hiroshima City Hospital, Cardiology, Hiroshima, Japan
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18
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Ishimiya M, Nakamura H, Kobayashi Y, Noguchi-Shinohara M, Abe C, Dohmoto C, Ikeda Y, Tokuno K, Ooi K, Yokokawa M, Iwasa K, Komai K, Kawashiri S, Yamada M. Tooth loss-related dietary patterns and cognitive impairment in an elderly Japanese population: The Nakajima study. PLoS One 2018; 13:e0194504. [PMID: 29543872 PMCID: PMC5854423 DOI: 10.1371/journal.pone.0194504] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 03/05/2018] [Indexed: 12/22/2022] Open
Abstract
Although several studies have demonstrated a potential correlation of dietary patterns with cognitive function, the relationship between tooth loss and dietary patterns and cognitive function have not been identified. In this cross-sectional study, we used a reduced rank regression (RRR) analysis, a technique used previously to observe dietary patterns based on the intakes of nutrients or levels of biomarkers associated with the condition of interest, to identify tooth loss-related dietary patterns and investigate the associations of such patterns with cognitive impairment in 334 community-dwelling Japanese subjects aged ≥ 60 years. According to Pearson correlation coefficients, the intakes of six nutrients (ash content, sodium, zinc, vitamin B1, α- and β-carotene) correlated significantly with the number of remaining teeth. Using RRR analysis, we extracted four dietary patterns in our subject population that explained 86.67% of the total variation in the intakes of these six nutrients. Particularly, dietary pattern 1 (DP1) accounted for 52.2% of the total variation. Food groups with factor loadings of ≥ 0.2 included pickled green leafy vegetables, lettuce/cabbage, green leaves vegetables, cabbage, carrots/squash; by contrast, rice had a factor loading of <−0.2. In a multivariate regression analysis, the adjusted odds ratios regarding the prevalence of cognitive impairment for the lowest, middle and highest tertiles of the DP1 score were 1.00 (reference), 1.224 (95% confidence interval [CI]: 0.611–2.453) and 0.427 (95% CI: 0.191–0.954), respectively. To our knowledge, this is the first report to show that tooth loss-related dietary patterns are associated with a high prevalence of cognitive impairment. These results may motivate changes in dental treatment and the dietary behaviours and thereby lower the risk of cognitive impairment.
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Affiliation(s)
- Mai Ishimiya
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Hiroyuki Nakamura
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Yutaka Kobayashi
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Moeko Noguchi-Shinohara
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Chiemi Abe
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Chiaki Dohmoto
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Yoshihisa Ikeda
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Kahori Tokuno
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Kazuhiro Ooi
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Masami Yokokawa
- Department of Physical Therapy, Division of Health Science, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Kazuo Iwasa
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Kiyonobu Komai
- Department of Neurology, Ioh Hospital, National Hospital Organization, Kanazawa, Japan
| | - Shuichi Kawashiri
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Masahito Yamada
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
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19
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Shino H, Otsuka-Yamasaki Y, Sato T, Ooi K, Inanami O, Sato R, Yamasaki M. Familial Congenital Methemoglobinemia in Pomeranian Dogs Caused by a Missense Variant in the NADH-Cytochrome B5 Reductase Gene. J Vet Intern Med 2018; 32:165-171. [PMID: 29356095 PMCID: PMC5787195 DOI: 10.1111/jvim.15031] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 10/02/2017] [Accepted: 11/29/2017] [Indexed: 01/07/2023] Open
Abstract
Background In veterinary medicine, congenital methemoglobinemia associated with nicotinamide adenine dinucleotide (NADH)‐cytochrome b5 reductase (b5R) deficiency is rare. It has been reported in several breeds of dogs, but little information is available about its etiology. Objectives To analyze the NADH‐cytochrome b5 reductase gene, CYB5R3, in a Pomeranian dog family with methemoglobinemia suspected to be caused by congenital b5R deficiency. Animals Three Pomeranian dogs from a family with methemoglobinemia were analyzed. Five healthy beagles and 5 nonrelated Pomeranian dogs without methemoglobinemia were used as controls. Methods Methemoglobin concentration, b5R activity, and reduced glutathione (GSH) concentration were measured, and a turbidity index was used to evaluate Heinz body formation. The CYB5R3 genes of the affected dog and healthy dogs were analyzed by direct sequencing. Results Methemoglobin concentrations in erythrocytes of the affected dogs were remarkably higher than those of the control dogs. The b5R activity of the affected dogs was notably lower than that of the control dogs. DNA sequencing indicated that this Pomeranian family carried a CYB5R3 gene missense variant (ATC→CTC at codon 194) that resulted in the replacement of isoleucine (Ile) by leucine (Leu). Conclusions and Clinical Importance This dog family had familial congenital methemoglobinemia caused by b5R deficiency, which resulted from a nonsynonymous variant in the CYB5R3 gene. This variation (c.580A>C) led to an amino acid substitution (p.Ile194Leu), and Ile194 was located in the proximal region of the NADH‐binding motif. Our data suggested that this variant in the canine CYB5R3 gene would affect function of the b5R in erythrocytes.
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Affiliation(s)
- H Shino
- Department of Veterinary Medicine, Faculty of Agriculture, Iwate University, Morioka, Iwate, Japan
| | - Y Otsuka-Yamasaki
- Department of Veterinary Medicine, Faculty of Agriculture, Iwate University, Morioka, Iwate, Japan
| | - T Sato
- Estie Animal Hospital, Kooriyama, Fukushima, Japan
| | - K Ooi
- Ooi Animal Hospital, Kooriyama, Fukushima, Japan
| | - O Inanami
- Department of Veterinary Medicine, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - R Sato
- Department of Veterinary Medicine, Faculty of Agriculture, Iwate University, Morioka, Iwate, Japan
| | - M Yamasaki
- Department of Veterinary Medicine, Faculty of Agriculture, Iwate University, Morioka, Iwate, Japan
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Ooi K, Inoue N, Matsushita K, Yamaguchi H, Mikoya T, Minowa K, Kawashiri S, Nishikata S, Tei K. Incidence of anterior disc displacement without reduction of the temporomandibular joint in patients with dentofacial deformity. Int J Oral Maxillofac Surg 2018; 47:505-510. [PMID: 29305246 DOI: 10.1016/j.ijom.2017.11.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 10/03/2017] [Accepted: 11/30/2017] [Indexed: 11/30/2022]
Abstract
The aim of this study was to investigate the incidence of anterior disc displacement without reduction (ADDwoR) of the temporomandibular joint (TMJ) in patients with dentofacial deformity. Eighty-eight female patients (176 joints) with skeletal class III malocclusion and 33 female patients (66 joints) with skeletal class II malocclusion, with or without anterior open bite and asymmetry, were evaluated. Magnetic resonance imaging (MRI) of the TMJ was used to diagnose ADDwoR. A statistical analysis was performed to examine the relationship between ADDwoR and skeletal structure. ADDwoR was present in 37 of the 66 joints (56.1%) in class II compared to 34 of the 176 joints (19.3%) in class III (P<0.05). In class III, ADDwoR was significantly more common in joints with mandibular asymmetry (24/74; 32.4%) than in joints with open bite (9/62; 14.5%) and joints with open bite and without mandibular asymmetry (1/38; 2.6%). In class II, ADDwoR was significantly less common in joints with mandibular asymmetry and without open bite (1/8; 12.5%). ADDwoR was only observed on the deviated side in both class III and class II with mandibular asymmetry. The prevalence of ADDwoR differed according to the dentofacial morphology.
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Affiliation(s)
- K Ooi
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan; Department of Oral and Maxillofacial Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa, Japan.
| | - N Inoue
- Gerodontology, Department of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - K Matsushita
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - H Yamaguchi
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - T Mikoya
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - K Minowa
- Dental Radiology, Department of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - S Kawashiri
- Department of Oral and Maxillofacial Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - S Nishikata
- Oral and Maxillofacial Surgery, Sapporo Higashi Tokushukai Hospital, Sapporo, Hokkaido, Japan
| | - K Tei
- Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
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Kobayashi K, Jokaji R, Miyazawa-Hira M, Takatsuka S, Tanaka A, Ooi K, Nakamura H, Kawashiri S. Elastin‑derived peptides are involved in the processes of human temporomandibular disorder by inducing inflammatory responses in synovial cells. Mol Med Rep 2017; 16:3147-3154. [PMID: 28714016 PMCID: PMC5548023 DOI: 10.3892/mmr.2017.7012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 05/30/2017] [Indexed: 11/06/2022] Open
Abstract
Temporomandibular joint dysfunction (TMD) is a collection of clinical symptoms that involve masticatory muscles and the temporomandibular joint (TMJ). Common symptoms include limited jaw motion and joint sound/pain, along with TMJ disc displacement. TMD is frequently associated with synovitis, a chronic inflammation of the synovium. Fibroblast-like synovial cells have been identified to produce several inflammatory mediators and may have an important role in the progression of TMJ inflammation. Degradation of the extracellular matrix molecule elastin may lead to the release of bioactive peptides. The present study aimed to explore the role of elastin-derived peptides (EDPs) in human temporomandibular disorders. Therefore, interleukin-6 (IL-6) expression in the synovial fluid obtained from patients with TMD correlated significantly with two clinical parameters, specifically TMJ locking and pain/jaw function on a visual analog scale (VAS). To the best of our knowledge, this is the first study to determine that the concentration of EDPs in synovial fluid from patients with TMD may also be significantly correlated with the duration of TMJ locking, the VAS score and IL-6 expression. In vitro, EDPs act on human TMJ synovial cells to promote upregulation of IL-6 and the elastin-degrading enzyme matrix metalloproteinase-12 (MMP-12). The upregulation of IL-6 and MMP-12 expression by EDPs may be mediated through elastin-binding proteins (EBP) and a protein kinase A signalling cascade. These findings suggest a model for inflammation in the TMJ where EDPs are generated by harmful mechanical stimuli, induce both a pro-inflammatory cascade and increase expression of MMP-12 through activation of the EBP signalling cascade. This may lead to further increases in EDP levels, establishing a positive feedback loop leading to chronic inflammation in the TMJ. Therefore, significantly elevated levels of EDPs and IL-6 in the synovial fluid of the TMJ may be indicators of the pathological conditions of the joint.
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Affiliation(s)
- Kazuhiko Kobayashi
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920‑8640, Japan
| | - Rei Jokaji
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920‑8640, Japan
| | - Mayuko Miyazawa-Hira
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920‑8640, Japan
| | - Shigeyuki Takatsuka
- Department of Oral and Maxillofacial Surgery, Public Central Hospital of Matto Ishikawa, Hakusan, Ishikawa 924-8588, Japan
| | - Akira Tanaka
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920‑8640, Japan
| | - Kazuhiro Ooi
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920‑8640, Japan
| | - Hiroyuki Nakamura
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920‑8640, Japan
| | - Shuichi Kawashiri
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920‑8640, Japan
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Ooi K, Jokaji R, Ide K, Kobayashi Y, Noguchi N, Katoh K, Nakamura H, Takamichi S, Nakata M, Kasahara K, Kawashiri S. Evaluation of obstructive sleep apnoea and sleep quality in patients with skeletal class III malocclusion. Int J Oral Maxillofac Surg 2017. [DOI: 10.1016/j.ijom.2017.02.1107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Jokaji R, Ooi K, Ide K, Ishimiya M, Kobayashi Y, Kitahara H, Noguchi N, Katoh K, Nakamura H, Takamichi S, Nakata M, Kasahara K, Kawashiri S. Perioperative evaluation and management of obstructive sleep apnoea after mandibular setback by sagittal split ramus osteotomy. Int J Oral Maxillofac Surg 2017. [DOI: 10.1016/j.ijom.2017.02.1093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kobayashi Y, Ooi K, Ide K, Jokaji R, Noguchi N, Katoh K, Nakamura H, Takamichi S, Nakata M, Kasahara K, Kawashiri S. Evaluation of obstructive sleep apnoea using peripheral arterial tonometry during perioperative period after removal of impacted third molar with dentofacial deformity in general anaesthesia. Int J Oral Maxillofac Surg 2017. [DOI: 10.1016/j.ijom.2017.02.1096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ueki K, Okabe K, Marukawa K, Mukozawa A, Moroi A, Miyazaki M, Sotobori M, Ishihara Y, Yoshizawa K, Ooi K. Skeletal stability after mandibular setback surgery: comparison between the hybrid technique for fixation and the conventional plate fixation using an absorbable plate and screws. J Craniomaxillofac Surg 2013; 42:351-5. [PMID: 23838410 DOI: 10.1016/j.jcms.2013.06.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Revised: 06/03/2013] [Accepted: 06/03/2013] [Indexed: 10/26/2022] Open
Abstract
PURPOSE The purpose of this study was to compare the temporal changes in condylar long axis and skeletal stability after sagittal split ramus osteotomy (SSRO) with the hybrid fixation technique and the conventional plate fixation. PATIENTS AND METHODS Of 44 Japanese patients diagnosed with mandibular prognathism, 22 underwent SSRO with the conventional plate fixation (1 u-HA/PLLA plate and 4 monocortical screws in each side) and 22 underwent SSRO with a hybrid fixation technique (1 u-HA/PLLA plate and 4 monocortical screws and bicortical screw in each side). The temporal changes in condylar long axis and skeletal stability were assessed by axial, frontal, and lateral cephalograms. After surgery, breakage of the plate and screws was checked by 3-dimensional computed tomography (3DCT). RESULTS Although there was a significant difference between the groups regarding Me-Ag in T1 (P = 0.0138), there were no significant differences between the groups for the other measurements in lateral, frontal and axial cephalometric analysis in each time interval. In two cases, 4 sides in the conventional plate fixation group, failure of the absorbable plate was found by 3DCT. However, there was no breakage in the hybrid fixation group. CONCLUSION This study suggested that there were no significant differences in the postoperative temporal changes between the two groups in mandibular setback surgery.
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Affiliation(s)
- Koichiro Ueki
- Department of Oral and Maxillofacial Surgery (Head: Prof. Dr. K. Ueki), Division of Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 1110 Shimokato, Chuo-shi, Yamanashi 409-3898, Japan.
| | - Katsuhiko Okabe
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kanazawa University, 13-1 Takaramachi, Kanazawa 920-8641, Japan
| | - Kohei Marukawa
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kanazawa University, 13-1 Takaramachi, Kanazawa 920-8641, Japan
| | - Aya Mukozawa
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kanazawa University, 13-1 Takaramachi, Kanazawa 920-8641, Japan
| | - Akinori Moroi
- Department of Oral and Maxillofacial Surgery (Head: Prof. Dr. K. Ueki), Division of Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 1110 Shimokato, Chuo-shi, Yamanashi 409-3898, Japan
| | - Mao Miyazaki
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kanazawa University, 13-1 Takaramachi, Kanazawa 920-8641, Japan
| | - Megumi Sotobori
- Department of Oral and Maxillofacial Surgery (Head: Prof. Dr. K. Ueki), Division of Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 1110 Shimokato, Chuo-shi, Yamanashi 409-3898, Japan
| | - Yuri Ishihara
- Department of Oral and Maxillofacial Surgery (Head: Prof. Dr. K. Ueki), Division of Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 1110 Shimokato, Chuo-shi, Yamanashi 409-3898, Japan
| | - Kunio Yoshizawa
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kanazawa University, 13-1 Takaramachi, Kanazawa 920-8641, Japan
| | - Kazuhiro Ooi
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kanazawa University, 13-1 Takaramachi, Kanazawa 920-8641, Japan
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Blanchard F, Ooi K, Tanaka T, Doi A, Tanaka K. Near-field terahertz imaging of a discontinuity in split ring resonator array. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134109006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Abstract
The authors describe a case of intra-articular fracture of the left mandibular condyle, successfully treated by the pumping technique in the upper and lower joint cavities, and show arthroscopic findings in these cavities. The patient was a 15-year-old boy whose maximum mouth opening was 30 mm. Computed tomography revealed a left intra-articular sagittal fracture of the condylar head. Aspiration of the hematoma in the upper and lower joint spaces was performed with ten pumping actions. In the upper and lower joint spaces, arthroscopic examination revealed the disappearance of the hematoma. The patient continued opening, protrusive, and lateral excursive exercises. One month after the surgery, the maximal interincisal distance was improved to 45 mm with straight opening. In the case presented, mouth-opening exercises, along with the pumping technique for treatment of an intraarticular fracture of the mandibular condyle, allowed satisfactory and stable results in the improvement of limited mouth movement.
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Affiliation(s)
- Shinya Yura
- Department of Oral and Maxillofacial Surgery, Tonami General Hospital, 1-61 Shintomi-cho, Tonami-city, Toyama-ken 939-1395 Japan.
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Blanchard F, Ooi K, Tanaka T, Doi A, Tanaka K. Terahertz spectroscopy of the reactive and radiative near-field zones of split ring resonator. Opt Express 2012; 20:19395-19403. [PMID: 23038582 DOI: 10.1364/oe.20.019395] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A terahertz microscope has been used to excite and observe the resonant modes of a single split ring resonator in the reactive and radiative near-field zones. The two lowest resonant modes of an isolated split ring resonator with their corresponding radiation patterns are reported; they showed good agreement to simulations. The passage from the reactive to radiative near-field zone is also discussed. Further, our result introduced a novel technique to perform terahertz time-domain spectroscopy of samples a few tens of micrometers in size by measuring the in-plane radiative near-field zone.
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Affiliation(s)
- F Blanchard
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Sakyo-ku, Kyoto, Japan.
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Abstract
AIM The Australasian colorectal surgeon's current approach to preoperative rectal cancer management was compared with international guidelines. METHOD Members of the Colorectal Surgical Society of Australia and New Zealand were surveyed in 2010, on the use of MRI and the management of locally advanced rectal cancer. Surgeons had to decide the appropriate management in five scenarios that were developed from national guidelines. RESULTS Of 174 invitations sent, 108 (62.1%) replies were received. Most surgeons (98.1%) had access to MRI. Ninety-three (86.1%) would use MRI routinely for staging. The majority selected a tumour-specific mesorectal resection for upper rectal cancer (58.2%) and a total mesorectal excision for distal cancer (100%). Almost all restorative operations included a covering ileostomy. One third of surgeons recommended that patients with a favourable cT3 mid-rectal tumour (N0, clear circumferential resection margins) should not have preoperative therapy and should proceed directly to surgery. When high-risk features, such as threatened resection margins or cN1 stage, were present, 5% and 15% of surgeons, respectively, would continue to treat by standard resection without preoperative therapy. CONCLUSION Evidence-based international guidelines for the management of rectal cancer have changed little in the last 10 years. Despite this, there is a clear gap between these and clinical practice. The main variance relates to the role of radiotherapy in locally advanced rectal cancer. Despite considerable evidence that radiotherapy reduces local recurrence for all stages of rectal cancer, current practice in Australasia is for its selective use.
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Affiliation(s)
- K Ooi
- Colorectal Unit, Department of Surgery, Western Hospital, Melbourne, Victoria, Australia.
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Ooi K, Skinner I, Croxford M, Faragher I, McLaughlin S. Managing fistula-in-ano with ligation of the intersphincteric fistula tract procedure: the Western Hospital experience. Colorectal Dis 2012; 14:599-603. [PMID: 21831102 DOI: 10.1111/j.1463-1318.2011.02723.x] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
AIM To review the preliminary results of the ligation of the intersphincteric fistula tract (LIFT) technique in treating complex anal fistulas at our hospital. METHOD Between March and November 2010, patients with cryptoglandular anal fistulas were recruited prospectively from the colorectal clinic and treated using the LIFT procedure. A database was set up to collect information on demographics, past surgical treatments, fistula characteristics, MRI scan results, operative data and follow-up findings. The primary end-point measured was cure of the disease. The secondary end-point was the degree of postoperative continence. Preoperative and postoperative incontinence rates were recorded using Wexner's Incontinence Scale. RESULTS Twenty-five patients (eight women and 17 men; median age, 40 years) underwent the LIFT procedure. Ten patients had recurrent fistulas and previous fistula surgery. The median operating time was 39 min. No intraoperative complications were documented. The median follow-up duration was 22 (3-43) weeks. Primary healing was observed in 17 (68.0%) patients and the median healing time was 6 weeks; one wound remained incompletely healed. Seven patients (28.0%) had disease recurrence presenting between 7 and 20 weeks postoperatively. No patients reported any incontinence postoperatively. CONCLUSION The LIFT procedure has favourable healing rates with little or no risk of incontinence. This operation is safe and easy to learn. The early results from this pilot study show promise and affirm some of the findings of other researchers. These results will suggest opportunities to conduct further controlled studies comparing the LIFT procedure with standard therapies.
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Affiliation(s)
- K Ooi
- Colorectal Unit, Department of Surgery, Western Hospital, Melbourne, Victoria, Australia.
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Yura S, Ooi K, Izumiyama Y. Relationship between the Effectiveness of Arthrocentesis under Sufficient Pressure and Conditions of the Temporomandibular Joint. ISRN Dent 2011; 2011:376475. [PMID: 21991472 PMCID: PMC3170017 DOI: 10.5402/2011/376475] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Accepted: 05/11/2011] [Indexed: 11/23/2022]
Abstract
Background. The purpose of this study is to investigate the conditions of the temporomandibular joint relative to the effectiveness of an arthrocentesis-like enforced manipulation technique followed by irrigation under high pressure in patients with closed lock. Methods. We performed arthroscopic examination and manipulation followed by irrigation as the initial treatment in 50 joints with closed lock. Relationship between the effectiveness of the procedure and conditions of the temporomandibular joint was statistically analyzed using multiple regression analysis. Results. Significant inverse correlations were found between the extent of improvement in maximum mouth opening after treatment and the initial maximum opening before treatment. There were no significant correlations between improvement of joint pain at mouth opening and in biting and conditions of the temporomandibular joint. Conclusions. Pathologic conditions of the temporomandibular joint did not have an influence on the efficacy of the technique. This result suggests that this procedure has wider application than conventional arthrocentesis.
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Affiliation(s)
- Shinya Yura
- Department of Oral and Maxillofacial Surgery, Tonami General Hospital, 1-61, Shintomi-cho, Tonami-city, Toyama-ken 939-1395, Japan
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Matsushita K, Inoue N, Yamaguchi HO, Ooi K, Totsuka Y. Tooth-borne distraction of the lower anterior subapical segment for correction of class II malocclusion, subsequent to genioplasty. Oral Maxillofac Surg 2011; 15:183-188. [PMID: 20635106 DOI: 10.1007/s10006-010-0242-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2010] [Accepted: 07/06/2010] [Indexed: 05/29/2023]
Abstract
INTRODUCTION Alveolar distraction is mainly used to increase height and width of the alveolar crest. This technique, however, is not typically used for lengthening the perimeter of the dental arch or improving teeth axes. We applied alveolar distraction in a tooth-borne manner in the second stage of our original method and obtained favorable results. We therefore present an outline of this method. CASE REPORT Genioplasty was first performed to create an infrastructure for sequential advancement of the subapical alveolar segment. After bone union, anterior subapical alveolar osteotomy was performed. The stump of the osteotomized dentate segment was moved forward without changing the incisal edge position, and a box-type bioabsorbable plate with four holes was fixed only onto the dentate segment using two screws. After a latency period, two distraction devices were placed bilaterally to the brackets and activated at 1.0 mm/day. After reaching the desired position, the distractor was immobilized, and then replaced by resin temporary teeth to retain the created space. After the consolidation period, orthodontic treatment was restarted and teeth moved into the newly created space. Bimaxillary surgery was performed after completing pre-surgical orthodontic treatment. Finally, both desirable occlusion and functional masticatory function were obtained. CONCLUSION This tooth-borne distraction system is one applicable method for patients with skeletal class II and crowding of lower anterior teeth, achieving good results particularly in combination with our original method.
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Affiliation(s)
- Kazuhiro Matsushita
- Department of Oral and Maxillofacial Surgery, Division of Oral Pathobiological Science, Graduate School of Dental Medicine, Hokkaido University, Kita-ku, Sapporo, Hokkaido, Japan.
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Yura S, Ooi K, Izumiyama Y. Procedures of endoscopic periradicular surgery. Quintessence Int 2010; 41:537-541. [PMID: 20614038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
When a tooth with an apical lesion is identified, an apicoectomy is frequently performed when nonsurgical treatment is considered unfeasible or has previously failed. However, the treatment is usually difficult in molars. This article describes a minimally invasive procedure for removing a gutta-percha point under the maxillary sinus mucosa using an ultrathin arthroscope and a visualization approach in apicoectomy using an intranasal endoscope. These surgical techniques using endoscopes are minimally invasive and reliable procedures that provide limited incision and bone removal and respect the integrity of the maxillary sinus.
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Affiliation(s)
- Shinya Yura
- Department of Oral and Maxillofacial Surgery, Tonami General Hospital, Toyama, Japan.
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Shingaki K, Matsuzaki S, Taniguchi M, Kubo T, Fujiwara T, Kanazawa S, Yamamoto A, Tamura H, Maeda T, Ooi K, Matsumoto K, Shiosaka S, Tohyama M. Molecular mechanism of kallikrein-related peptidase 8/neuropsin-induced hyperkeratosis in inflamed skin. Br J Dermatol 2010; 163:466-75. [DOI: 10.1111/j.1365-2133.2010.09864.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Matsushita K, Inoue N, Yamaguchi HO, Ooi K, Totsuka Y. Chin Augmentation With Thin Cortical Bone Concomitant With Advancement Genioplasty. J Oral Maxillofac Surg 2010; 68:691-5. [DOI: 10.1016/j.joms.2009.09.066] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2008] [Revised: 07/20/2009] [Accepted: 09/16/2009] [Indexed: 11/27/2022]
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Yura S, Kato T, Ooi K, Izumiyama Y. Tongue Reduction Techniques With an Ultrasonic Surgical Aspirator. J Oral Maxillofac Surg 2009; 67:1568-71. [DOI: 10.1016/j.joms.2009.03.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2008] [Accepted: 03/08/2009] [Indexed: 11/28/2022]
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Wright D, Kucia A, Northey D, Ooi K, Horowitz J. Can An Acute Cardiac Assessment Nurse Reduce Time Spent in ED for Patients Presenting with Chest Pain? Heart Lung Circ 2009. [DOI: 10.1016/j.hlc.2009.05.191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Affiliation(s)
- K. Ooi
- Department of Biology, Faculty of Science, Kyushu University, Hakozaki, Fukuoka 812‐8581, Japan
| | - T. Yahara
- Department of Biology, Faculty of Science, Kyushu University, Hakozaki, Fukuoka 812‐8581, Japan
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Yura S, Kato T, Ooi K, Izumiyama Y. A combination of three minimally invasive surgical procedures for implant placement in the posterior maxilla with insufficient bone quantity. ACTA ACUST UNITED AC 2008; 106:e1-5. [PMID: 18554959 DOI: 10.1016/j.tripleo.2008.04.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2008] [Revised: 04/03/2008] [Accepted: 04/12/2008] [Indexed: 11/19/2022]
Abstract
We describe a combination of 3 surgical procedures for implant placement in the posterior maxilla with insufficient bone quantity and quality. In these situations, we have performed 3 minimally invasive, safe, and reliable surgical procedures: buccal bone graft with bone harvested from the mandibular molar region, submucous vestibuloplasty using artificial dermis, and bone-added osteotome sinus floor elevation under endoscopic control. These modified procedures can be performed in the office setting under outpatient local anesthesia and may minimize patient discomfort and reduce postoperative complications.
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Affiliation(s)
- Shinya Yura
- Department of Oral and Maxillofacial Surgery, Tonami General Hospital, Tonami, Japan.
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Shibayama M, Ooi K, Johnson R, Scott B, Itoh Y. Suppression of tandem-multimer formation during genetic transformation of the mycotoxin-producing fungus Penicillium paxilli by disrupting an orthologue of Aspergillus nidulans uvsC. Curr Genet 2002; 42:59-65. [PMID: 12420147 DOI: 10.1007/s00294-002-0330-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2002] [Revised: 08/14/2002] [Accepted: 08/14/2002] [Indexed: 11/27/2022]
Abstract
An orthologue of Aspergillus nidulans uvsC and Saccharomyces cerevisiae RAD51 was cloned from the filamentous fungus, Penicillium paxilli. A mutation in uvsC causes UV sensitivity during germination. The product of RAD51 is involved in meiotic recombination and DNA damage repair. The deduced amino acid sequence of the product of this gene (Pprad51) shared 92% identity with UVSC. Site-specific disruption of pprad51 showed a significant effect for extra-cellular DNA integration. Transformation of the null mutant with pII99, which confers geneticin resistance, resulted in a shift from a predominance of direct repeats at a single site to single copies when compared with a control strain. A copy-number effect of integrated pII99 for geneticin selection was suggested as the frequency of direct repeat formation was less when selected at a lower concentration in the control strain. However, such an effect was not observed in the null mutant, further supporting an involvement of Pprad51 in direct repeat formation.
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Affiliation(s)
- Mayumi Shibayama
- Department of Biological Sciences, Faculty of Science, Shinshu University, Matsumoto, Nagano, Japan
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Hosoda H, Ooi K, Tsukahara T, Inaki E, Kataoka Y, Chin S, Sunamori M. [A frequent fiber-scopic bronchial lavege for the case of bilateral sever pulmonary contusion with flail chest]. Kyobu Geka 2001; 54:352-4. [PMID: 11296431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
A 26-year-old man was injured in the traffic accident. He had complicated chest trauma. He came to our hospital by ambulance immediately after rescued from crashed his automobile. He had severe pulmonary contusion with frail chest, pulmonary laceration, tension hemopneumothorax, and hypovolemic shock, and air embolism of the brain. He was managed with fiber-optic bronchoscopy under mechanical ventilation and chest drainage. Frequent broncho-scopic bronchial lavage of respiratory tract with thrombin and adrenaline solution was helpful to prevent anoxia due to complicated chest injury. He developed acute bacterial empyema and multiple organ failure due to septic shock during intensive care for trauma. However, he underwent surgical treatment for empyema and fully returned to his work after 6 months after his critical accident.
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Affiliation(s)
- H Hosoda
- Department of Thoracic Surgery, Hokushin General Hospital, Nakano, Japan
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Hiraoka A, Nagasawa T, Ohta N, Sugimura A, Shimizu N, Ooi K, Shimizu S. A human myeloid cell line producing stem cell growth factor, KPB-M15, secretes another growth factor active on murine hematopoietic progenitor cells. Acta Haematol 2000; 100:174-80. [PMID: 9973638 DOI: 10.1159/000040899] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Human stem cell growth factor (SCGF) produced by a myeloid cell line, KPB-M15, exhibits species-specific hematopoietic activities. However, KPB-M15-conditioned medium induced colony formation of mouse bone marrow cells. KPB-M15-derived colony-stimulating activity (CSA) was purified through Butyl-Toyopearl 650c and Cu2+ chelating-Sepharose 6B chromatography. TSK-G3000SW gel filtration of the purified preparation presented 3 distinct peaks around Vo, 150 kD and 85 kD. Gel fractions extracted from SDS-PAGE had macrophage colony-stimulating factor (M-CSF)-specific amino acid sequences. PCR, Northern hybridization and ELISA demonstrated that KPB-M15 cells secreted a significant amount of M-CSF and IL-6. Anti-M-CSF but not anti-IL-6 antibody abrogated CSA in KPB-M15-CM. IL-6 hardly synergized with M-CSF to enhance colony formation. Collectively, M-CSF is a sole CSA for murine hematopoietic progenitor cells in KPB-M15-CM. This is the first report of a human myeloid cell line, KPB-M15, constitutively producing M-CSF in addition to SCGF and IL-6. It can be useful in investigating the mechanism of production of M-CSF.
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Affiliation(s)
- A Hiraoka
- Department of Internal Medicine, Osaka Dental University, Osaka, Japan.
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Ooi K, Miyai Y, Makita Y, Kanoh H. FRACTIONATION OF LITHIUM ISOTOPES IN ION EXCHANGE CHROMATOGRAPHY WITH TITANIUM PHOSPHATE EXCHANGER. SEP SCI TECHNOL 1999. [DOI: 10.1081/ss-100100701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Yahara T, Ooi K, Oshita S, Ishii I, Ikegami M. Molecular evolution of a host-range gene in geminiviruses infecting asexual populations of Eupatorium makinoi. Genes Genet Syst 1998; 73:137-41. [PMID: 9794079 DOI: 10.1266/ggs.73.137] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Asexual plants of Eupatorium makinoi is frequently infected with tobacco leaf curl geminivirus (TLCV). The host range of TLCV is narrow, and ORF C4 is considered to function as a host range determinant. Using this TLCV-Eupatorium system, we tested the expectation that the rate of amino acid replacements will be accelerated in ORF C4 if resistant genes of the host plants drive molecular evolution in ORF C4. ORF C4 is entirely contained within a longer ORF C1 encoding a replication protein. We analyzed 21 sequences containing ORF C4 and a part of ORF C1. While per-site number of synonymous substitutions exceeded that of replacements in ORF C1, per-site number of replacements exceeded that of synonymous substitutions in ORF C4. However, this excess of per-site replacement in ORF C4 was mostly explained by the overlap gene nature, because most synonymous substitutions in ORF C1 change amino acid of ORF C4. In conclusion, not positive but negative selection is a predominant mode characterizing molecular evolution of ORF C4.
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Affiliation(s)
- T Yahara
- Department of Biology, Kyushu University, Fukuoka, Japan
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Hirano T, Ooi K, Yoshino G, Kashiwazaki K, Adachi M, Sakai S. 4.P.66 High prevalence of small dense LDL in diabetic nephropathy is not associated with renal dysfunction: A possible role of postprandial hyperlipidemia. Atherosclerosis 1997. [DOI: 10.1016/s0021-9150(97)89592-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abstract
Rates of phosphate adsorption to PT-A (a new type of aluminium oxide hydroxide) and ALG (aluminum hydroxide gel) from a pH 3 phosphate solution were measured by a batch method. Phosphate uptake progressed mainly by the adsorption mechanism for PT-A, but dissolution of aluminum and precipitation of aluminum phosphate took place in addition to phosphate adsorption for ALG. The intraparticle diffusivities (Dp'S) of phosphate were evaluated from the time courses of adsorption using the model of pore diffusion with a Freundlich-type adsorption isotherm. The Dp values were approximately 7 x 10(-7) cm2 S-1 for PT-A and 1 x 10(-6) cm2 s(-1) for ALG. The tortuosity factors calculated from a model of parallel plate pore were 5.1 for PT-A and 6.7 for ALG; these values resembled those for porous inorganic ion exchangers. The adsorption rates are high enough for each of the samples to be utilized as a phosphate adsorbent to prevent hyperphosphatemia in patients on chronic dialysis. PT-A is favored as a phosphate adsorbent because of its high chemical stability against acid.
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Affiliation(s)
- W P Tang
- Marine Resources Department, Shikoku National Industrial Research Institute, Takamatsu, Japan
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Ooi K, Ohkubo T, Higashigawa M, Kawasaki H, Sakurai M. Increased deoxycytidine kinase activity by etoposide in L1210 murine leukemic cells. Biol Pharm Bull 1996; 19:1382-3. [PMID: 8913519 DOI: 10.1248/bpb.19.1382] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Deoxycytidine kinase (dCK) is a rate-limiting enzyme for the activation of ara-C. It is responsible for the phosphorylation of ara-C which is widely used in the treatment of leukemia. We examined the effect of etoposide on dCK in L1210 cells and found that incubation with 10 microM etoposide for 1 h increased dCK activity to 170% of the control. This effect of etoposide on dCK activity was concentration-dependent up to at least 100 microM of the substance.
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Affiliation(s)
- K Ooi
- Department of Pharmacy, Yokkaichi Social Insurance Hospital, Mie, Japan
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Abstract
Cytologic examination of seven peritoneal fluids from nine patients with pseudomyxoma peritonei revealed papillary clusters and isolated neoplastic cells. In all patients, one or both ovaries were replaced by proliferating (borderline) mucinous epithelial tumors of grade I-II intestinal type while three patients had synchronous appendiceal tumors of similar morphologic appearance. Four of the nine patients demonstrated positive correlation between the presence of neoplastic cells in the ovarian interstitial mucin (pseudomyxoma ovarii), the extraovarian peritoneum, and the free peritoneal fluid. Two patients demonstrated a negative correlation. The submission of an inadequate amount of ovarian or appendiceal tissue for histologic examination may account for the discordance in three patients. It is concluded that pseudomyxoma peritonei is a distinct clinicopathologic entity which can be subdivided into two types, acellular and cellular. This distinction, unlike the specific cytomorphologic features, may have prognostic significance.
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Affiliation(s)
- N Mulvany
- Department of Cytology, Royal Women's Hospital, Melbourne, Australia
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