Faculty Profiles - YOSHIHARA Akihiro

Papers - YOSHIHARA Akihiro

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Investigation on reproducibility of the term for classification of occlusion Reviewed

AOTO Seiji, FUKAMACHI Hiroomi, YOSHIHARA Akihiro, SAITO Isao

63 ( 2 ) 95 - 99 2004.12

Language：Japanese Publishing type：Research paper (scientific journal)

The purpose of this study was to evaluate the clinical availability of classification of occlusion proposed in "Classification of Occlusion in Clinical Orthodontics" published by Yogosawa Society of Orthodontists in 2000. Four orthodontists categorized study casts of one hundred orthodontic patients according to this classification of occlusion. The procedure was repeated two months later to assess intra-examiner agreement. Weighted kappa (κ_w) for intra- and inter-examiner agreement were calculated. An interpretation of κ_w was made on the basis of sensitivity and specificity by Landis and Altman. κ_w for intra-examiner agreement showed a value of 0.67 on an average, which implies substantial agreement. Both an initial and the second κ_w for inter-examiner agreement were more than O . 62 on average, indicating reliable and substantial agreement. Repeatability among four examiners was more dependent on familiarity with this term rather than on clinical experiences. With respect to repeatability among various types of malocclusion, "protruding upper bite" and "protruding lower bite" showed substantial agreement while "deep bite" and "diverted bite" indicated moderate agreement. (Orthod Waves-Jpn Ed 63(2) : 95-99, 2004)

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Other Link： https://projects.repo.nii.ac.jp/?action=repository_uri&item_id=171805

Association between Serum IgG Subclass Levels and Periodontal Status in an Elderly Japanese Population Reviewed

KOBAYASHI Takao, NAKASHIMA Keisuke, YOSHIHARA Akihiro, MIYAZAKI Hideo, KOWASHI Yusuke

JOURNAL OF THE JAPANESE ORGANISATION FOR RESEARCH OF PERIODONTOLOGY 46 ( 1 ) 31 - 38 2004.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：JAPANESE SOCIETY OF PERIODONTOLOGY

Previous reports suggested that the association between serum IgG subclass levels and periodontal status is influenced by genetic and environmental factors, such as race and smoking. Japanese population living in the same area may be appropriate for evaluating this association due to similar racial and environmental factors. The present cross-sectional investigation studied this association in an elderly population of 451 subjects aged, 71 years residing in Niigata, Japan. Smokers and edentulous individuals were excluded. Dentulous nonsmokers were classified into 2 groups based on the number of teeth : those with fewen than 20 teeth and those with 20 or more teeth. The percentage of sites with PAL≥4mm and serum IgG 1 levels was significantly higher in subjects with fewer than 20 teeth. A significant negative correlation was observed between the number of teeth and IgG 1 subclass levels. This data indicates that higher levels of serum IgG 1 are associated with reduced numbers of teeth in a Japanese elderly population. Longitudinal investigation is necessary to clarify the reason for this in periodontitis-susceptible individuals.

DOI： 10.2329/perio.46.31

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Other Link： http://search.jamas.or.jp/link/ui/2004199192

The Relationship between Appetite and Quality of Life in Community-dwelling Older Adults Reviewed

YOSHIHARA Akihiro, SEIDA Yoshikazu, KATAOKA Shojiro, HANADA Nobuhiro, MIYAZAKI Hideo

JOURNAL OF DENTAL HEALTH 54 ( 3 ) 241 - 248 2004.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society for Oral Health

There are many elderly people who enjoy meals in their daily life. The purpose of this study was to evaluate the relationship between appetite and quality of life, controlling the known confounding factors. In this study, 600 subjects aged 70 years were included. In order to integrate quality of life, we used a face scale which has five face figures considered appropriate for a five-stage evaluation. A questionnaire survey was conducted to evaluate appetite. In addition, we obtained data on physical factors, healthy actions, social factors and oral symptoms. The comparison of the appetite, score of oral symptoms and other general factors between two groups divided according to the face scale score was investigated by multiple logistic regression analysis. We selected two kinds of dependent variables according to each face scale score (models 1 and 2). Appetite, total score of oral symptoms, Tokyo Metropolitan Institute of Gerontology index (TMIG index), amount of sleep and gender as independent variables were selected in both models. In model 1, appetite (Odds ratio : 2.77, p<0.05), total score of oral symptoms (Odds ratio : 1.25, p<0.05) , TMIG index (Odds ratio : 1.25, p<0.0l) were significant. On the other hand, in model 2, appetite (Odds ratio : 3.23, p<0.00l), TMIG index (Odds ratio : 1.24, p< 0.001) and amount of sleep (Odds ratio : 1.72,p<0.0l) were significant. Appetite was associated significantly with the face scale in both models 1 and 2, and the total score of oral symptoms was associated with the face scale in model 1. This study suggests that there was a significant relationship between appetite and quality of life in community-dwelling older adults, and a recovery of oral symptoms was necessary for improvement in the quality of life.

DOI： 10.5834/jdh.54.3_241

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The long term effect of fluoride mouthrinse on changes in salivary levels of mutans streptococci in school children Reviewed

Akihiro Yoshihara, Shihoko Sakuma, Jing Wang, Hideo Miyazaki

Journal of Dental Health 54 233 - 240 2004.12

A longitudinal study of the relationship between periodontal disease and bone mineral density in community-dwelling older adults

A Yoshihara, Y Seida, N Hanada, H Miyazaki

JOURNAL OF CLINICAL PERIODONTOLOGY 31 ( 8 ) 680 - 684 2004.8

A longitudinal study of the relationship between periodontal disease and bone mineral density in community-dwelling older adults Reviewed

A Yoshihara, Y Seida, N Hanada, H Miyazaki

JOURNAL OF CLINICAL PERIODONTOLOGY 31 ( 8 ) 680 - 684 2004.8

The Effect of Chewing Ability on the Dietary Intake of Healthy Elderly People Reviewed

KANMORI Hideki, YOSHIHARA Akihiro, ANDO Yuichi, MIYAZAKI Hideo

JOURNAL OF DENTAL HEALTH 53 ( 1 ) 13 - 22 2003.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society for Oral Health

Recenly in the field of clinical dentistry, and particularly in gerodontics, there has been a growing awareness of the importance of nutrition. A lack of chewing ability might be associates with nutritional deficiency, but there is hardly any substantial evidence to support this assumption. This study investigated the effect of chewing ability on intake of total calories, and nutrients by healthy elderly people. The study sample consisted of 512 elderly residents in Niigata City (265 males, 247 females) aged 70 years, who were in good general health and did not require as stance to perform their daily activities. Chewing ability was divided into two categories : being able to chew all foods (15 test foods) was considered "good", and not being able to chew any of the foods was considered "poor". To determine quantitative food intake, a semi-quantitative food frequency questionnaire was utilized during interviews by nutritionists. A personal interview was performed about lifestyle and oral health. QOL (Quality of life) was evaluated using a "Face Scale". Oral examinations, body measurements and blood tests were performed. We evaluated the relationship between chewing ability and subjective symptoms of oral health using odds ratio. Furthermore, relationships between chewing ability and total calorie intake, nutrient and food were investigated using a linear multiple regression model. Poor chewing ability was found in 48% of males and 60% of females. The mean number of teeth present was 17.88 (SD=9.49) for males and 17.01 (SD=9.00) for females. The mean total calorie intake was 1,706.3 kcal (SD=350.8) for males and 1,474.9 kcal (SD=252.3) for females. The variables that significantly affect low chewing ability and the odds ratios were gender (female 1.62), number of teeth present (edentulous participants 8.51, participants with 1-10 teeth 6.03, participants with 11-20 teeth 5.29 compared with participants with 21 or more teeth), the presence of swelling and pain in the gums (2.47), the presence of mobile teeth (1.92), the degree of saliva flow (sufficient 3.13, undetermined 1.70), lower QOL (2.02). In males, total calorie intake and vegetable and fruit intake were significantly lower in the poor chewing category than in the good category according to multiple regression analysis. In females, there was no significant association between the 2 chewing ability categories. Low intake of vegetables and fruits leads to low dietary fiber and vitamin intake. Especially vitamin C, E and carotene are known as antioxidants, and adequate intake of these were thought to prevent cardiovascular disease and gastro-intestinal disease. Lower chewing ability might be a risk factor for these diseases in healthy males aged 70 years or older. In conclusion, the findings suggested that chewing ability might affect total calorie intake and vegetable and fruit intake in healthy males aged 70 years or older.

DOI： 10.5834/jdh.53.1_13

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Root Caries Prevalence and Association between Root Caries and Coronal Caries in the Elderly Reviewed

TAKANO Naoko, YOSHIHARA Akihiro, ANDO Yuichi, OGAWA Hiroshi, HIROTOMI Toshinobu, YAMAGA Takayuki, HANADA Nobuhiro, MIYAZAKI Hideo

JOURNAL OF DENTAL HEALTH 53 ( 5 ) 592 - 598 2003.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society for Oral Health

The purpose of this study was to investigate the prevalence and intraoral distribution of root caries in the elderly, and to identify the association between root caries and coronal caries. Six hundred noninstitutionalized adults aged 70 years in Niigata, Japan were examined for their oral status and general health status. A total of 544 subjects identified as dentate was available for assessment. The prevalence of root caries was evaluated as the percentage of the subjects with one or more root caries and the mean number of teeth with root caries. The intraoral distribution was evaluated as the mean percentage of exposed root surfaces affected by root caries in terms of tooth surface (buccal, lingual, distal, mesial) and tooth group (incisor, canine, premolar, molar). In the analysis of the associations, subjects were divided into 4 groups according to the number of coronal caries first, and then the prevalence of root caries was evaluated in each group. Next, logistic regression analysis where the dependent variable was one or more root caries and the independent variables including the number of teeth with coronal caries was performed. The percentage of male subjects with one or more root caries (DF) was 56.9% and that of female subjects was 53.3%. The mean number of root DFT was 1.81 (SD=2.41) per person for males and that for females was 1.41 (SD=1.93) per person, respectively. As for untreated root caries (D), the percentage of male subjects with one or more root D was 21.7% and that of female subjects was 19.8%. The mean number of root DT for males was 0.46 (SD=1.10) per person and that for females was 0.32 (SD=0.81) per person. The tooth type most commonly affected by root caries in the maxilla was canine and in the mandible it was premolar. The percentage of exposed root surfaces affected by root caries was 17.5% and 11.5%, respectively. As for tooth surface distribution, the buccal surfaces were the most commonly affected with a percentage of 15.8%. The mean number of teeth with root caries and the percentage of subjects with root caries increased with the number of coronal caries. Logistic regression analysis indicated that the prevalence of coronal caries was significantly associated with that of root caries (odds ratio=1.08, p<0.001) after adjusting for other oral variables. In conclusion, the results suggest that the prevalence of root caries in the elderly was high, and the prevalence of coronal caries was associated with root caries prevalence.

DOI： 10.5834/jdh.53.5_592

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Factors associated with root caries incidence in an elderly population

Naoko Takano, Yuichi Ando, Akihiro Yoshihara, Hideo Miyazaki

Community Dental Health 20 ( 4 ) 217 - 222 2003.12

新潟大学歯学部卒前教育における客観的臨床能力試験(OSCE)の導入 Reviewed

興地隆史, 福島正義, 葭原明弘, 子田晃一, 小野和宏, 小林博, 魚島勝美, 小山純市, 植田耕一郎, 高木律男, 前田健康, 花田晃治

日本歯学教育学会誌 18 ( 2 ) 300 - 307 2003.12

Epidemiological Study on Marginal and Apical Periodontal Conditions in Japanese Elderly People Using Panoramic Radiograph Reviewed

HIURA Kenji, YOSHIHARA Akihiro, MIYAZAKI Hideo

JOURNAL OF DENTAL HEALTH 53 ( 2 ) 130 - 136 2003.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society for Oral Health

The purpose of this study was to evaluate the radiographically-detected marginal and apical periodontal conditions in elderly people. The subjects were 100 (57 males, 43 females) people at least 70 years old who underwent oral examinations in Niigata City in 1998 (baseline examination), 1999 and 2000. The following parameters calculated on panoramic radiograph were studied for alveolar bone loss and apical periodontal conditions (the existence of periapical lesions, and root canal fillings). We compared subjects by number of teeth and Eichner index (following EI). Third molars were excluded from all analyses. In the baseline study, the rate of nonvital teeth was 36.9%, and the rate of periapical lesions was 35.6%. The mean alveolar bone loss was 30.1% (SD=12.1) in 1998 (baseline examination) and 31.3% (SD=12.2) in 2000. This increase was significant (p<0.05). The mean alveolar bone loss compared by number of teeth was 36.4% in those with 1-9 present teeth, 34.0% for 10-19 present teeth, 27.5% for 20 or more present teeth. The number of teeth lost in 2 years was 50, 7 vital teeth and 43 nonvital. The results of tooth-level multiple logistic regression analysis showed that the incidence of 50% or more alveolar bone loss was high in anterior teeth, molars, males, and 20 or more present teeth. Tooth-level multiple logistic regression analysis showed that the incidence of tooth loss was high in nonvital teeth, teeth with periapical lesions, 50% or more alveolar bone loss, and teeth with clasps. These findings suggest that elderly people with 20 or more present teeth have a low risk of alveolar bone loss and tooth loss. They further suggested that preservation of the pulp was associated with decline of the risk factors for tooth loss.

DOI： 10.5834/jdh.53.2_130

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Improvement in Gingivitis by School Based Prevention Programme at the Elementary School with the Use of Dental Floss after 18 Months Reviewed

Akihiro Yoshihara, Kouichi Fukai, Yuko Morozumi, Toshinobu Hirotomi, Hideo Miyazaki

Journal of Dental Health 53 91 - 97 2003.12

Factors associated with root caries incidence in an elderly population Reviewed

Naoko Takano, Yuichi Ando, Akihiro Yoshihara, Hideo Miyazaki

Community Dental Health 20 ( 4 ) 217 - 222 2003.12

Association between serum albumin and root caries in community-dwelling older adults Reviewed

A. Yoshihara, N. Hanada, H. Miyazaki

Journal of Dental Research 82 ( 3 ) 218 - 222 2003

Longitudinal study on periodontal conditions in healthy elderly people in Japan Reviewed

T Hirotomi, A Yoshihara, M Yano, Y Ando, H Miyazaki

COMMUNITY DENTISTRY AND ORAL EPIDEMIOLOGY 30 ( 6 ) 409 - 417 2002.12

Two-year Cohort Study on Risk Predictors for Tooth Loss in Residing in the Community 70-year-old Subjects Reviewed

SEIDA Yoshikazu, YOSHIHARA Akihiro, ANDO Yuichi, MIYAZAKI Hideo

JOURNAL OF DENTAL HEALTH 52 ( 5 ) 663 - 671 2002.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society for Oral Health

This study investigated the two-year incidence of tooth loss to identify risk predictors for tooth loss in 70-year-old subjects residing in the community. We obtained baseline (1998) and two-year follow-up (2000) data from 402 dentate subjects living in Niigata City. The follow-up rate was 72.6%. To identify risk predictors for tooth loss, variables denoting oral health status and general health status, were obtained using a questionnaire and by performing examinations and blood investigations at the baseline, were included in a multiple logistic regression analysis. Overall, 30.8% of subjects lost one or more teeth with in 2 years after the index year. The mean number of missing teeth per year was 0.27. Tooth loss was frequently observed in this population, however, the distribution of the number of teeth lost was highly skewed. The results of multiple logistic regression analysis showed that tooth loss was greater in persons with BMI (Body mass index)≧24, IgG (Serum immunogloblin)≧1,901 mg/dl, impaired daily physical activities, percentages of sites of LA (Loss of attachment) 6+mm≧4%, nine or more crown restorations and one or more root decayed teeth. The findings from this study suggest that general health status contributes to tooth loss in elderly people, in addition to oral diseases such as root caries and severe periodontal conditions.

DOI： 10.5834/jdh.52.5_663

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Longitudinal study on periodontal conditions in healthy elderly people in Japan

T Hirotomi, A Yoshihara, M Yano, Y Ando, H Miyazaki

COMMUNITY DENTISTRY AND ORAL EPIDEMIOLOGY 30 ( 6 ) 409 - 417 2002.12

Relationship between dental occlusion and physical fitness in an elderly population

T Yamaga, A Yoshihara, Y Ando, Y Yoshitake, Y Kimura, M Shimada, M Nishimuta, H Miyazaki

JOURNALS OF GERONTOLOGY SERIES A-BIOLOGICAL SCIENCES AND MEDICAL SCIENCES 57 ( 9 ) M616 - M620 2002.9

Risk factors for periodontal disease progression among elderly people Reviewed

Hiroshi Ogawa, Akihiro Yoshihara, Toshinobu Hirotomi, Yuichi Ando, Hideo Miyazaki

Journal of Clinical Periodontology 29 ( 7 ) 592 - 597 2002.7

Risk factors for periodontal disease progression among elderly people

H Ogawa, A Yoshihara, T Hirotomi, Y Ando, H Miyazaki

JOURNAL OF CLINICAL PERIODONTOLOGY 29 ( 7 ) 592 - 597 2002.7

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