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Nishi H, Kajiya M, Ohta K, Shigeishi H, Obayashi T, Munenaga S, Obayashi N, Yoshioka Y, Konishi M, Naruse T, Matsumoto A, Odo A, Kitagawa M, Ando T, Shintani T, Tokikazu T, Ino N, Mihara N, Kakimoto N, Tsuga K, Tanimoto K, Ohge H, Kurihara H, Kawaguchi H. Relationship of oral bacterial number with medical hospitalization costs in analysis of Diagnosis Procedure Combination database from single institution in Japan. Sci Rep 2024; 14:11114. [PMID: 38750118 PMCID: PMC11096395 DOI: 10.1038/s41598-024-60733-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Accepted: 04/26/2024] [Indexed: 05/18/2024] Open
Abstract
Oral bacteria are known to be associated with perioperative complications during hospitalization. However, no presented reports have clarified the relationship of oral bacterial number with medical costs for inpatients. The Diagnosis Procedure Combination (DPC) database system used in Japan provides clinical information regarding acute hospital patients. The present study was conducted to determine the association of oral bacterial numbers in individual patients treated at a single institution with length of hospital stay and medical costs using DPC data. A total of 2369 patients referred by the medical department to the dental department at Hiroshima University Hospital were divided into the low (n = 2060) and high (n = 309) oral bacterial number groups. Length of hospital stay and medical costs were compared between the groups, as well as the associations of number of oral bacteria with Charlson comorbidity index (CCI)-related diseases in regard to mortality and disease severity. There was no significant difference in hospital stay length between the low (24.3 ± 24.2 days) and high (22.8 ± 20.1 days) oral bacterial number groups. On the other hand, the daily hospital medical cost in the high group was significantly greater (US$1456.2 ± 1505.7 vs. US$1185.7 ± 1128.6, P < 0.001). Additionally, there was no significant difference in CCI score between the groups, whereas the daily hospital medical costs for patients in the high group treated for cardiovascular disease or malignant tumors were greater than in the low number group (P < 0.05). Multivariate regression analysis was also performed, which showed that oral bacterial number, age, gender, BMI, cardiovascular disease, diabetes, malignant tumor, and hospital stay length were independently associated with daily hospitalization costs. Monitoring and oral care treatment to lower the number of oral bacteria in patients affected by cardiovascular disease or cancer may contribute to reduce hospitalization costs.
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Affiliation(s)
- Hiromi Nishi
- Department of General Dentistry, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-Ku, Hiroshima, 734-8553, Japan.
| | - Mikihito Kajiya
- Department of Innovation and Precision Dentistry, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
- Department of Oral Laboratory Center, Hiroshima University Hospital, Hiroshima, Japan
| | - Kouji Ohta
- Department of Public Oral Health, Program of Oral Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Hideo Shigeishi
- Department of Public Oral Health, Program of Oral Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Taiji Obayashi
- Department of Dental Hygiene, Ogaki Women's College, Gifu, Japan
| | - Syuichi Munenaga
- Department of General Dentistry, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-Ku, Hiroshima, 734-8553, Japan
| | - Nami Obayashi
- Department of General Dentistry, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-Ku, Hiroshima, 734-8553, Japan
- Department of Oral Laboratory Center, Hiroshima University Hospital, Hiroshima, Japan
| | - Yukio Yoshioka
- Department of Oral Oncology, Graduate School of Biomedical Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Masaru Konishi
- Department of Oral and Maxillofacial Radiology, Hiroshima University Hospital, Hiroshima, Japan
| | - Takako Naruse
- Department of Oral and Maxillofacial Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Akihiro Matsumoto
- Department of Medical Informatics, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Ayaka Odo
- Department of Orthodontics and Craniofacial Developmental Biology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Masae Kitagawa
- Department of Oral Laboratory Center, Hiroshima University Hospital, Hiroshima, Japan
- Department of Oral and Maxillofacial Pathobiology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Toshinori Ando
- Department of Oral Laboratory Center, Hiroshima University Hospital, Hiroshima, Japan
- Department of Oral and Maxillofacial Pathobiology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Tomoaki Shintani
- Department of Oral Laboratory Center, Hiroshima University Hospital, Hiroshima, Japan
| | - Tomoko Tokikazu
- Department of Clinical Practice and Support, Hiroshima University Hospital, Hiroshima, Japan
| | - Natsumi Ino
- Department of Clinical Practice and Support, Hiroshima University Hospital, Hiroshima, Japan
| | - Naoki Mihara
- Department of Medical Informatics, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Naoya Kakimoto
- Department of Oral and Maxillofacial Radiology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Kazuhiro Tsuga
- Department of Advanced Prosthodontics, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Kotaro Tanimoto
- Department of Orthodontics and Craniofacial Developmental Biology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Hiroki Ohge
- Department of Infectious Diseases, Hiroshima University Hospital, Hiroshima, Japan
| | | | - Hiroyuki Kawaguchi
- Department of General Dentistry, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-Ku, Hiroshima, 734-8553, Japan
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Number of Bacteria in Saliva in the Perioperative Period and Factors Associated with Increased Numbers. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19137552. [PMID: 35805211 PMCID: PMC9265513 DOI: 10.3390/ijerph19137552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 06/18/2022] [Accepted: 06/19/2022] [Indexed: 02/05/2023]
Abstract
Perioperative oral management is performed to prevent postoperative complications, but its indication and management method are unclear. This study aimed to investigate salivary bacterial counts pre-and postoperatively, and factors related to increased bacterial count postoperatively. We included 121 patients who underwent surgery under general anesthesia and perioperative oral management. The bacterial count in saliva was determined preoperatively, and first and seventh days postoperatively using the dielectrophoresis and impedance measurement methods. The relationships between salivary bacterial count and various variables were analyzed using one-way analysis of variance, Spearman’s rank correlation coefficient, and multiple regression analysis. The salivary bacterial count increased significantly on the first day postoperatively but decreased on the seventh day. Multivariate analysis showed that age (p = 0.004, standardized coefficient β = 0.283) and xerostomia (p = 0.034, standardized coefficient β = 0.192) were significantly correlated with increased salivary bacterial count preoperatively. Salivary bacterial count on the day after surgery was significantly increased in patients with a large number of bacterial counts on the day before surgery after preoperative oral care (p = 0.007, standardized coefficient β = 0.241) and postoperative fasting (p = 0.001, standardized coefficient β = −0.329). Establishing good oral hygiene before surgery and decreasing salivary bacterial count are necessary in patients with a high risk of postoperative surgical site infection or pneumonia, especially in older adults or postoperative fasting.
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Zhang M, Lv Y, Hou S, Liu Y, Wang Y, Wan X. Differential Mucosal Microbiome Profiles across Stages of Human Colorectal Cancer. Life (Basel) 2021; 11:831. [PMID: 34440574 PMCID: PMC8401903 DOI: 10.3390/life11080831] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 08/12/2021] [Accepted: 08/12/2021] [Indexed: 02/06/2023] Open
Abstract
Emerging evidences link gut microbiota to colorectal cancer (CRC) initiation and development. However, the CRC stage- and spatial-specific bacterial taxa were less investigated, especially in a Chinese cohort, leading to our incomplete understanding of the functional roles of gut microbiota in promoting CRC progression and recurrence. Here, we report the composition and structure of gut microbiota across CRC stages I, II and III, by analyzing the gut mucosal microbiomes of 75 triplet-paired samples collected from on-tumor, adjacent-tumor and off-tumor sites and 26 healthy controls. We observed tumor-specific pattern of mucosal microbiome profiles as CRC progressed and identified ten bacterial taxa with high abundances (>1%) as potential biomarkers for tumor initiation and development. Peptostreptococcus and Parvimonas can serve as biomarkers for CRC stage I. Fusobacterium, Streptococcus, Parvimonas, Burkholderiales, Caulobacteraceae, Delftia and Oxalobacteraceae can serve as biomarkers for CRC stage II, while Fusobacterium, Burkholderiales, Caulobacteraceae, Oxalobacteraceae, Faecalibacterium and Sutterella can serve as biomarkers for CRC stage III. These biomarkers classified CRC stages I, II and III distinguished from each other with an area under the receiver-operating curve (AUC) > 0.5. Moreover, co-occurrence and co-excluding network analysis of these genera showed strong correlations in CRC stage I, which were subsequently reduced in CRC stages II and III. Our findings provide a reference index for stage-specific CRC diagnosis and suggest stage-specific roles of Peptostreptococcus, Fusobacterium, Streptococcus and Parvimonas in driving CRC progression.
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Affiliation(s)
- Mingqing Zhang
- Nankai University School of Medicine, Nankai University, Tianjin 300071, China;
- Tianjin Union Medical Center, Nankai University, Tianjin 300121, China; (Y.L.); (Y.L.)
| | - Yongming Lv
- Tianjin Union Medical Center, Nankai University, Tianjin 300121, China; (Y.L.); (Y.L.)
| | - Shaobin Hou
- Advanced Studies in Genomics, Proteomics and Bioinformatics, University of Hawaii, Honolulu, HI 96822, USA;
| | - Yanfei Liu
- Tianjin Union Medical Center, Nankai University, Tianjin 300121, China; (Y.L.); (Y.L.)
- Graduate School, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Yijia Wang
- Tianjin Union Medical Center, Nankai University, Tianjin 300121, China; (Y.L.); (Y.L.)
| | - Xuehua Wan
- TEDA Institute of Biological Sciences and Biotechnology, Nankai University, TEDA, Tianjin 300071, China
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Osako R, Matsuda Y, Itohara C, Sukegawa-Takahashi Y, Sukegawa S, Okuma S, Furuki Y, Kanno T. Relationship between Oral Bacterial Count and Postoperative Complications among Patients with Cardiovascular Disease Treated by Surgery: A Retrospective Cohort Study. Healthcare (Basel) 2021; 9:healthcare9070850. [PMID: 34356228 PMCID: PMC8304811 DOI: 10.3390/healthcare9070850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 06/30/2021] [Accepted: 07/01/2021] [Indexed: 11/18/2022] Open
Abstract
In this retrospective observational study, we evaluated the relationship between perioperative oral bacterial counts and postoperative complications in cardiovascular disease (CVD) patients. From April 2012 to December 2018, all patients scheduled for surgery received perioperative oral management (POM) by oral specialists at a single center. Tongue dorsum bacterial counts were measured on the pre-hospitalization day, preoperatively, and postoperatively. Background data were collected retrospectively. Among the 470 consecutive patients, the postoperative complication incidence rate was 10.4% (pericardial fluid storage, n = 21; postoperative pneumonia, n = 13; surgical site infection, n = 9; mediastinitis, n = 2; and seroma, postoperative infective endocarditis, lung torsion, and pericardial effusion, n = 1 each). Oral bacterial counts were significantly higher in the pre-hospitalization than in the pre- and postoperative samples (p < 0.05). Sex, cerebrovascular disease, and operation time differed significantly between complications and no-complications groups (p < 0.05). Multivariate analysis with propensity score adjustment showed a significant association between postoperative oral bacterial count and postoperative complications (odds ratio 1.26; 95% confidence interval, 1.00–1.60; p = 0.05). Since the development of cardiovascular complications is a multifactorial process, the present study cannot show that POM reduces complications but indicates POM may prevent complications in CVD patients.
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Affiliation(s)
- Rie Osako
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine & Oral Care Center, Shimane University Hospital, Izumo 693-8501, Japan; (R.O.); (Y.M.); (C.I.); (S.O.)
| | - Yuhei Matsuda
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine & Oral Care Center, Shimane University Hospital, Izumo 693-8501, Japan; (R.O.); (Y.M.); (C.I.); (S.O.)
| | - Chieko Itohara
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine & Oral Care Center, Shimane University Hospital, Izumo 693-8501, Japan; (R.O.); (Y.M.); (C.I.); (S.O.)
| | - Yuka Sukegawa-Takahashi
- Department of Oral and Maxillofacial Surgery, Kagawa Prefectural Central Hospital, Takamatsu 760-8557, Japan; (Y.S.-T.); (S.S.); (Y.F.)
| | - Shintaro Sukegawa
- Department of Oral and Maxillofacial Surgery, Kagawa Prefectural Central Hospital, Takamatsu 760-8557, Japan; (Y.S.-T.); (S.S.); (Y.F.)
| | - Satoe Okuma
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine & Oral Care Center, Shimane University Hospital, Izumo 693-8501, Japan; (R.O.); (Y.M.); (C.I.); (S.O.)
| | - Yoshihiko Furuki
- Department of Oral and Maxillofacial Surgery, Kagawa Prefectural Central Hospital, Takamatsu 760-8557, Japan; (Y.S.-T.); (S.S.); (Y.F.)
| | - Takahiro Kanno
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine & Oral Care Center, Shimane University Hospital, Izumo 693-8501, Japan; (R.O.); (Y.M.); (C.I.); (S.O.)
- Correspondence: ; Tel.: +81-853-20-2301
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Effect of Mucosal Brushing on the Serum Levels of C-Reactive Protein for Patients Hospitalized with Acute Symptoms. ACTA ACUST UNITED AC 2020; 56:medicina56100549. [PMID: 33086612 PMCID: PMC7603140 DOI: 10.3390/medicina56100549] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 10/13/2020] [Accepted: 10/15/2020] [Indexed: 12/26/2022]
Abstract
This study was based in a hospital setting. Patients with acute symptoms face a life-threatening crisis and often have systemic complications during the convalescence stage. During the acute stage, oral function does not work and oral hygiene status deteriorates. A gauze or sponge brush is generally used to wipe the oral cavity; however, this process does not clean the oral cavity enough. Effective oral care requires better methods. Patients participating in this study were all hospitalized by ambulance and with acute symptoms. During the convalescence stage, patients were assigned application of mucosal brushing or wiping by gauze or sponge brush by order of hospitalization. The effects were evaluated by the number of bacteria on the tongue surface, serum C-reactive protein (CRP) and body temperature. Changes in bacterial count, body temperature, and CRP were effectively reduced in the mucosal brushing group compared to the wiping by gauze or sponge brush group. Based on mixed effect modeling, the coefficient of mucosal brushing for CRP was −2.296 and for body temperature was −0.067 and statistically significant. This simple method can effectively prevent systemic complication of inpatients with deteriorated oral conditions. This method may also be effective for the elderly in nursing homes or perioperative oral-care management.
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Relationship between Oral Health Status and Postoperative Fever among Patients with Lung Cancer Treated by Surgery: A Retrospective Cohort Study. Healthcare (Basel) 2020; 8:healthcare8040405. [PMID: 33081131 PMCID: PMC7712858 DOI: 10.3390/healthcare8040405] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 10/10/2020] [Accepted: 10/15/2020] [Indexed: 02/08/2023] Open
Abstract
A retrospective observational study using an oral bacteria counter was conducted to evaluate the trends in the number of oral bacteria in the perioperative period of lung cancer patients and to verify the relationship between oral health status and postoperative fever. All patients received perioperative oral management (POM) by oral specialists between April 2012 and December 2018 at Kagawa Prefectural Central Hospital, Kagawa, Japan prior to lung cancer surgery. Bacteria counts from the dorsum of the tongue were measured on the day of pre-hospitalization, pre-operation, and post-operation, and background data were also collected retrospectively. In total, 441 consecutive patients were enrolled in the study. Bonferroni’s multiple comparison test showed significantly higher oral bacteria counts at pre-hospitalization compared to pre- and post-operation (p < 0.001). Logistic regression analysis showed that body mass index, performance status, number of housemates, number of teeth, and white blood cell count at pre-operation were significantly associated with postoperative fever. The study showed that POM can reduce the level of oral bacterial counts, that the risk of postoperative complications is lower with dentulous patients, and that appropriate POM is essential for prevent of complications. Therefore, POM may play an important role in perioperative management of lung cancer patients.
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Gutsche JT, Grant MC, Kiefer JJ, Ghadimi K, Lane-Fall MB, Mazzeffi MA. The Year in Cardiothoracic Critical Care: Selected Highlights from 2019. J Cardiothorac Vasc Anesth 2020; 36:45-57. [PMID: 33051148 DOI: 10.1053/j.jvca.2020.09.114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 09/16/2020] [Indexed: 11/11/2022]
Abstract
In 2019, cardiothoracic and vascular critical care remained an important focus and subspecialty. This article continues the annual series to review relevant contributions in postoperative critical care that may affect the cardiac anesthesiologist. Herein, the pertinent literature published in 2019 is explored and organized by organ system.
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Affiliation(s)
- J T Gutsche
- Department of Anesthesiology and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.
| | - M C Grant
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
| | - J J Kiefer
- Department of Anesthesiology and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - K Ghadimi
- Department of Anesthesiology and Critical Care, Duke University, Durham, NC
| | - M B Lane-Fall
- Department of Anesthesiology and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - M A Mazzeffi
- Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, MD
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Furuya J, Beniya A, Suzuki H, Hidaka R, Matsubara C, Obana M, Yoshimi K, Yamaguchi K, Hara K, Nakagawa K, Nakane A, Tohara H, Minakuchi S. Factors associated with the number of microorganisms on the tongue surface in patients following acute stroke. J Oral Rehabil 2020; 47:1403-1410. [PMID: 33245592 DOI: 10.1111/joor.13074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 08/06/2020] [Accepted: 08/10/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND Oral hygiene management of patients with acute stroke is important for preventing aspiration pneumonia and ensuring oral intake. The tongue coating score can be useful for evaluating the oral hygiene level since it reflects the microorganism number on the tongue surface in elderly patients. However, the relationship between the number of oral microorganisms and the tongue coating score in patients with acute stroke remains unclear. OBJECTIVES We aimed to investigate the relationships between the microorganism number on the tongue surface and oral factors, including tongue coating score, tongue surface moisture level and tongue function. METHODS This cross-sectional study enrolled 73 patients with acute stroke who were hospitalised at an acute care hospital and underwent dental intervention. Potential explanatory factors, including sex, age, Glasgow Coma Scale score, tongue coating score, tongue surface moisture level, nutrition intake method, number of functional teeth and tongue function, were evaluated. Logistic regression analysis determined their association with the microorganism number on the tongue surface. RESULTS The tongue coating score (odds ratio: 1.31) and tongue surface moisture level (odds ratio: 1.10) were significantly associated with increased microorganism numbers on the tongue surface. CONCLUSION The tongue coating score, which reflects the actual number of microorganisms on the tongue surface, could be an effective tool for evaluating oral hygiene level in patients with stroke. Moreover, reducing oral microorganisms in saliva through oral hygiene management, including removing the tongue coating, could contribute towards the prevention of aspiration pneumonia.
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Affiliation(s)
- Junichi Furuya
- Oral Health Sciences for Community Welfare, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.,Department of Geriatric Dentistry, Showa University School of Dentistry, Tokyo, Japan
| | - Akane Beniya
- Oral Health Sciences for Community Welfare, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Hiroyuki Suzuki
- Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Rena Hidaka
- Oral Health Sciences for Community Welfare, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Chiaki Matsubara
- Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Michiyo Obana
- Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Kanako Yoshimi
- Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Kohei Yamaguchi
- Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Koji Hara
- Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Kazuharu Nakagawa
- Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Ayako Nakane
- Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Haruka Tohara
- Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Shunsuke Minakuchi
- Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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