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Volume 49 (1999)
- Issue 5 Pages 752-
- Issue 3 Pages 252-
- Issue 2 Pages 130-
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Volume 49, Issue 5
Displaying 1-9 of 9 articles from this issue
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ORIGINAL ARTICLE
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Dental Health Program for Infants, Primary School and Junior High School Students in Erimo, HokkaidoKimiya NAKAMURA, Okahito HONDA, Takashi KANEHIRA, Hiroshi TANI1999 Volume 49 Issue 5 Pages 752-760
Published: November 30, 1999
Released on J-STAGE: November 12, 2017
JOURNAL FREE ACCESSA dental health program for caries prevention started in Erimo town in 1986. Infants and schoolchildren aged 1 to 14 years were involved in the program. The dental health program consisted of oral health education, topical fluoride application, fissure sealing, and filling of cavities. In this study, we analyzed changes in dental caries prevalence in children between 1986 and 1995 in order to evaluate the effects of the program. The following results were obtained: 1. The mean dmft for children aged 1 to 5 years slightly decreased for 10 years. 2. Both the caries prevalence rate and the mean DMFT in 1 st and 2 nd grade children decreased for 10 years, but those of junior high school students did not change. 3. The caries prevalence rate of severe dental caries for infants and schoolchildren remarkably decreased for 10 years. 4. The dental health program in Erimo was effective in enhancing the dental health awareness of children and their parents. From these results, it was concluded that the dental health program in Erimo was effective in improving the dental health status of infants and schoolchildren.View full abstractDownload PDF (935K) -
Atsushi TOYAMA, Haruo NAKAGAKI, Nobuhiko FUJIGAKI, Kazuo KATO, Taeko M ...1999 Volume 49 Issue 5 Pages 761-770
Published: November 30, 1999
Released on J-STAGE: November 12, 2017
JOURNAL FREE ACCESSThis study was undertaken to determine whether the rate of dental caries differs in junior high school students between with and without F mouthrinsing experience. Subjects and methods: Students were examined in the A Junior High School, Aichi-ken. They were composed of graduates from 4 elementary schools, including O elementary school where an F mouthrinse program was started 9 years ago. Surfaces of 10 teeth (upper incisors, upper first molars, upper second molars, lower first molars, and lower second molars) were examined by a dentist with blind recording. These data were analyzed, taking into consideration their experiences of fluoride mouthrinsing (F rinsing group, O school graduates: non-F rinsing group, S, T and I elementary school graduates) with DMFT and DMFS in each year grade. Three factors (F rinsing, grade, and sex difference) were analyzed by analysis of variance (ANOVA). Results: The DMF tooth surface rate of all grades averages were 4.4% (F group) and 9.4% (non-F group). DMFT indices were 1.33 (F group) and 2.70 (non-F group). DMFS indices were 2.00 (F group) and 4.26 (non-F group). Furthermore, the caries reduction rate was 49.7%, and caries-free students accounted for 44.4% of the O group. According to the ANOVA tables, the F rinsing factor was significant for upper and lower first molars: it had large contribution rates of 4.3 and 9.1%. The sex factor was significant for the lower first molars, with a 2.7% contribution rate. The grade factor was not significant. Conclusions: The F-mouthrinsing group had significantly lower rates of caries, showing that the effectiveness continued even after the F rinsing had ceased. The reduction rate was 49.7% in general between those with and without F mouthrinsing. It was concluded that fluoride mouthrinsing students after stopping had fewer dental caries, as determined by the increase of caries-free subjects.View full abstractDownload PDF (899K) -
Lilani EKANAYAKE, Ranjith MENDIS, Yuichi ANDO, Hideo MIYAZAKI1999 Volume 49 Issue 5 Pages 771-779
Published: November 30, 1999
Released on J-STAGE: November 12, 2017
JOURNAL FREE ACCESSThe aims of this study were to determine the knowledge, attitudes, and behaviors pertaining to oral health and factors affecting toothbrushing frequency in adolescents. A total of 492 Year 11 students from two urban and eight rural randomly selected schools answered a pre-tested questionnaire under the supervision of their class teachers. The majority of students were knowledgeable about prevention of dental caries and periodontal disease, but there were certain misconceptions about the causes of these diseases. The mean knowledge and attitude scores were significantly higher in urban than in rural students. Logistic regression analysis revealed that gender, place of residence, knowledge about oral health, and having received information about oral health were significant predictors of toothbrushing frequency. Overall, the results indicate that knowledge, attitudes, and behaviors pertaining to oral health is poorer in rural than in urban students. Therefore, efforts should be taken to enhance the level of knowledge and behaviors pertaining to oral health of the rural community by means of improving and increasing oral health care programs directed at them.View full abstractDownload PDF (709K) -
Masayuki MORISHITA, Masaharu MIYAGI, Kunio KAWABATA, Midori ISHII1999 Volume 49 Issue 5 Pages 780-785
Published: November 30, 1999
Released on J-STAGE: November 12, 2017
JOURNAL FREE ACCESSThe purpose of this study was to estimate the needs for operative dentistry services, periodontal treatment, and prosthodontic treatment for adults in Hiroshima Prefecture. The data utilized were from the Report on the Survey of Dental Health in Hiroshima Prefecture issued in 1995, including population, the number of dentists, and dental offices in Hiroshima Prefecture. The total number of decayed teeth and one-tenth of filled teeth were considered as needing operative dentistry services. The highest code of CPITN for each person was utilized to assess the needs for periodontal treatment. The subjects who needed fixed or removable partial dentures were considered to have needs for prosthodontic treatment. The total amount of needs for operative dentistry service was 4.7 million teeth, which was 2,463 teeth per dentist, or 3,631 teeth per dental office. Time required for treatment was estimated to be 1,231 hours per dentist, or 1,815 hours per dental office. The number of adults who required periodontal treatment was estimated to be about 1.8 million. Time required for periodontal treatment was 825 hours per dentist, including 474 hours for oral health instruction, 267 hours for scaling, and 84 hours for complex treatment. The number of people needing prosthodontic treatment was estimated to be about 0.4 million. It was speculated that the time required for periodontal treatment was equal to or more than the capacity of operative dentistry services.View full abstractDownload PDF (620K) -
Manabu MORITA, Masayuki OGURA, Midori TSUNEISHI, Tatsuo WATANABE, Mahi ...1999 Volume 49 Issue 5 Pages 786-793
Published: November 30, 1999
Released on J-STAGE: November 12, 2017
JOURNAL FREE ACCESSThis study was related to endodontic expenditure and treatment patterns in private dental clinics in Japan. Dental care records registered in the national medical expenditure surveys of 1980, 1983, 1985, 1990 and 1994 were used. The numbers of samples analyzed in this study were 16,145, 8,831, 18,028, 17,165 and 18,294, respectively. The results were as follows: 1) Endodontic expenditure had gradually decreased since 1980. In 1994, the proportion of endodontic expenditure to dental care expenditure went down to 8.3%. 2) The 40-59 year-old group was given endodontic service more frequently than any other age group, accounting for one-third of all endodontic services. 3) The 70 or more year-old population exhibited the lowest proportion of endodontic expenditure (4.0-5.0% of dental care expenditure). On the other hand, endodontic expenditure was the greatest in the 20-29 year-old group (11% of the dental care expenditure), which was partly due to the higher prevalence of pulp extirpations in multirooted teeth. 4) Seventy-three percent of the teeth were electronically measured for root canal length in pulp extirpation procedures, and 51% were measured in infected root canal treatments. 5) Comprehensive value points in endodontic service were calculated. The most typical value point was based on a series of endodontic treatments with root canal filling after no or a single episode of intra-canal medication.View full abstractDownload PDF (782K) -
Fumiyo TAMURA, Rika AYANO, Miki MIZUKAMI, Yoshiaki OHTSUKA, Junko FUJI ...1999 Volume 49 Issue 5 Pages 794-802
Published: November 30, 1999
Released on J-STAGE: November 12, 2017
JOURNAL FREE ACCESSThe purpose of this study was to survey oral tactile hypersensitivity of individuals in nursing homes. The subjects were 53 individuals (13 males and 40 females, aged 45 to 97). Evaluation methods included a questionnaire covering daily life activities, oral health care, and diet. Dentists and a dental hygienist examined oral functions and conditions clinically. We analyzed relationships among oral tactile hypersensitivity, oral functions, oral hygiene control, and oral conditions using 42 non-denture wearers (10 males and 32 females, aged 45 to 97). The factors affecting oral tactile hypersensitivity were analyzed by x^2 test and Quantification Theory II. The results obtained were as follows: 1. Oral tactile hypersensitivity was detected in 27 of 42 (64.3%) individuals. 2. Oral tactile hypersensitivity was more prominent in the mandible than the maxilla. 3. There were no significant differences between feeding methods and oral tactile hypersensitivity. 4. There was a significant difference between glossitis and oral tactile hypersensitivity (p<0.01). 5. The usage of a tooth brush demonstrated the highest side coefficient of the correlation to oral tactile hypersensitivity in Quantification Theory II.View full abstractDownload PDF (1007K) -
Youichi IIJIMA, Okiuji TAKAGI1999 Volume 49 Issue 5 Pages 803-808
Published: November 30, 1999
Released on J-STAGE: November 12, 2017
JOURNAL FREE ACCESSAn in situ study was designed to evaluate the effects of sugar substitutes on remineralization potential using an artificial dental caries model in the oral environment. Palatinose, sorbitol, and xylitol were selected as sugar substitutes. An intra-oral device with thin demineralized enamel was fixed on the buccal surface of the first molar of five volunteers (3 males, 2 females; 20-29 years old). They wore the device for 10 days without brushing. During experimental periods, they rinsed with 2 ppm fluoride solution and with three sugar substitute solutions plus 2 ppm fluoride for 3 minutes. The remineralization potential was compared among the fluoride solution and three sugar substitutes. A group that rinsed with a fluoride solution and a demineralized group served as positive and negative control groups. The degree of remineralization was evaluated by the changes in lesion depth and mineral loss values. In the oral environment condition, the lesion depth values increased by approximately 25 //m even in the positive control groups. Except for palatinose, the fluoride and other sugar substitutes groups showed a trend toward demineralization compared with the negative control group. The improvement rate of the lesion depth was in the order of I fluoride, -16.6%; xylitol, -8.6%; sorbitol, - 7.9%; and palatinose, 0%. However, there were no statistically significant differences among any groups when they were compared with the positive control group. From the mineral loss point of view, the trend of demineralization was also similar to the lesion depth; the improvement rate was in the order of: Sorbitol, -23.8%; positive control, -20.8%; xylitol, -20.8%; and palatinose, -5.1%. However, there were no statistically significant differences among any groups when they were compared with the positive control group. Under this in situ study, there were no signs of remineralization at all. To maximize the remineralization potential of saliva by stimulating the secretion rate through sugar substitutes, it was suggested that plaque has to be removed, saliva should react directly with the lesion, and the use of a fluoride dentifrice was recommended.View full abstractDownload PDF (659K) -
Akihiro YOSHIHARA, Minoru YAGI, Emiko SAWAMURA, Noboru KANEKO, Hideo M ...1999 Volume 49 Issue 5 Pages 809-815
Published: November 30, 1999
Released on J-STAGE: November 12, 2017
JOURNAL FREE ACCESSThis study aimed to assess improvements in oral hygiene behavior by personal instruction in addition to dental examinations, using randomized case control research. Two hundred forty-four females were involved in this study. At baseline, we randomly assigned each to a test group (n = 117, mean age 30.3±3.8 yr) and a control group (n=127, mean age 30.4±3.9 yr). Subjects in the test group received personal instruction on a one-to-one basis for about 10 min. in addition to a dental examination. The instruction was performed to improve the following three items : CD the use of dental floss or interdental brushes, (2) the use of fluoridated toothpaste, cregular professional prophylaxis. We used a jaw model, booklets, dental floss, interdental brushes, and a list of fluoridated toothpastes for support of the instruction. After demonstrating the use of dental floss or interdental brushes, we found that the subjects were able to use them effectively. Changes in oral health conditions and oral health behavior were evaluated for a one-year period. Results showed that the rates of examinees who actually used dental floss or interdental brushes increased statistically from 17.1% (at baseline) to 28.2% (at 1 year) in the test group (p<0.05), compared with 15.0% (at baseline) to 17.3% (at 1 year) in the control group (not significant). Backward step-wise logistic multiple regression analysis showed that there was a significant association between the use of interdental applications at 1 year and the use of interdental applications at baseline (odds ratio : 12.56), information from a dentist (odds ratio : 3.15), and personal instruction (odds ratio 2.14). Our results demonstrated that personal instruction had the ability to improve oral hygiene behavior. Furthermore, information from dentists might be more useful in increasing the rate of examinees who use dental floss or interdental brushes.View full abstractDownload PDF (760K)
SHORT COMMUNICATION
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Yukiko MATSUMORI, Takashi HANIOKA, Keiko TAKAYA, Ryoichi MATSUSE, Sato ...1999 Volume 49 Issue 5 Pages 816-818
Published: November 30, 1999
Released on J-STAGE: November 12, 2017
JOURNAL FREE ACCESSDownload PDF (335K)
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