All issues
Volume 37 (1987)
- Issue 5 Pages 620-
- Issue 3 Pages 220-
- Issue 2 Pages 106-
- Issue 1 Pages 2-
Volume 37, Issue 1
Displaying 1-9 of 9 articles from this issue
- |<
- <
- 1
- >
- >|
-
Yoshikazu HASHIMOTO, Chuzo MIYAZAWA, Tokio SHIMIZU1987 Volume 37 Issue 1 Pages 2-7
Published: 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESS -
Itsuo UEDA1987 Volume 37 Issue 1 Pages 8-12
Published: 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESS -
Takeshi KONDO, Kaoru KASAHARA, Takashi NAKANE, Hisahide HIGUCHI, Mitsu ...1987 Volume 37 Issue 1 Pages 13-20
Published: 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSIn 1981 the Ministry of Welfare decided to start a national program of health promotion, the object of which was to establish continuous health care from the time of life in the womb, through birth, development, and aging, to the time of death. The purpose of dental health in this program was to prevent loss of teeth caused by dental diseases, especially periodontal disease among middled-aged people. In this program there were 5 experimental areas to investigate health conditions and to try new practices of health administration in the community. In 1986 we did a survey of the dental condition of 119 middle-aged people (between 39 and 44) living in Aoki village, one of 5 experimental areas east of Nagano prefecture.
The results were as follows:
1. The percentage of people treated for dental caries were 81.8% in men and 78.1% in women. The results were higher than those of the national dental survey in 1981.
2. The percentage of people having no inflammation in the gingiva was 54.5% in men and 81.3% in women. The results were higher than those of the national dental survey in 1981.
3. The percentage of people having dental calcules was 54.6% in men and 28.6 % in women. The results indicated the need for of oral prophylaxis, especially in men.
4. The mean number of lost teeth per person was 1.6 in men and 2.7 in women. In particular the loss of the second molar increased in proportion to aging.
5. The percentage of people with lost teeth and no prosthesis was 46.9% in men and 32.6% in women. People having more than 6-8 lost teeth generally suffered from malfunction of mastication.
6. The percentage of people having received treatment for dental diseases within one year prior to the date of survey was 43.6 % in men and 51.6 % in women.View full abstractDownload PDF (1544K) -
Yasunori NAKAMURA, Haruhiro KUWASHIMA, Hiroyoshi IWASAKI, Yoshio ITOH, ...1987 Volume 37 Issue 1 Pages 21-29
Published: 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSThis study was undertaken to determine if extracts from some sorts of chewing gum containing mutastein, a potent glucosyltransferase (GTase) inhibitor, have an inhibitory effect on insoluble glucan synthesis by Streptococcus mutans (S. mutans) and cellular adherence to glass. Six extracts from sucrose chewing gum and two sorts of palatinose chewing gum with or without mutastein were prepared and two S. mutans strains were cultivated in the BHI medium containing each extract. Similar experiments were also carried out using crude GTase of S. mutans 6715. Then adhesive and nonadhesive glucan products and growing cells adhering to glass in the six test mediums were determined.
It was found that insoluble glucan product, especially in adhesive glucan, and adhesive growing cells were fewer in the three mediums containing mutastein than in those without mutastein, although no obvious difference between S. mutans 6715 and B 13 was seen in the measured value. Similar results for insoluble glucan product were obtained in the experiment using crude GTase. In the experiment of in vitro plaque formation, fewer adhesive glucan and cells covered a glass rod in the medium with mutastein than in the medium without mutastein.
These results indicated that mutastein in chewing gum has a distinctly inhibitory effect on insoluble glucan synthesis and growing cells. It can be concluded from these in vitro studies that chewing of sucrose gum containing mutastein could lower dental caries due to sugar in the gum and also that palatinose gum with mutastein could prevent dental caries due to concomitant sugared foods by decreasing dental plaque formation in vivo.View full abstractDownload PDF (3526K) -
Masami YONEMITSU, Akihisa TSURUMOTO, Shogoro OKADA, Jinichiro SAZUKA, ...1987 Volume 37 Issue 1 Pages 30-41
Published: 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSWe studied the correlation between caries prevalence and daily habits of schoolchidren in two rural primary schools (AGUNI and TONAKI) and one urban primary school (AKAMICHI) in Okinawa prefecture from 1982 to 1984.
The results were as follows.
1) The caries prevalence was highest in AGUNI, and lowest in TONAKI in each year.
2) AKAMICHI showed the highest values in DI-S (OHI-S) and PMA-index of anterior teeth, and TONAKI showed the lowest values.
3) By means of discriminant analysis and factor analysis, it became clear that there were the regional characteristics which correlated with the oral status of the schoolchidren. The schoolchildren of AKAMICHI whose life style was urban (they brush their teeth well, they eat between meals many times, they eat supper late and go to bed late, ……) were higher than children in the other two regions in the mean scores of DI-S and PMA-index individually. The schoolchildren of AGUNI were inferior to those in the other two regions in health concepts (for example, they take a bath fewer times, and they brush their teeth fewer times.). The schoolchildren of AGUNI also did not have regular rhythm in their daily habits. This might be one of the reasons that the oral status of schoolchildren in AGUNI was worse than those in TONAKI.
4) The means of the fluoride concentration in drinking water were 0.3 ppm (TONAKI), 0.03 ppm (AGUNI), and 0.07 ppm (AKAMICHI).
5) There were no differences among the fluoride concentrations in the enamel surface of primary teeth in the 3 regions.View full abstractDownload PDF (2168K) -
Kayoko SHINADA1987 Volume 37 Issue 1 Pages 42-56
Published: 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSThis study was carried out to investigate whether c. w. (continuous wave) Nd: YAG laser irradiation might increase acid resistance of enamel in extracted rat molars and prevent dental caries in rats in vivo.
The laser was directed on to the normally erupted or prematurely exposed upper left first molars of rats. The upper right first molars of the same animals served as controls.
The acid resistance of enamel was increased by laser irradiation in the normally erupted and prematurely exposed teeth. The normally erupted teeth gained more acid resistance than the prematurely exposed teeth.
Laser irradiation twice (once a day for two days) effective by reduced dental caries in the normally erupted teeth as compared to the control side. The same dose of irradiation on the prematurely exposed teeth, however, failed to reduce dental caries significantly. Irradiation four times (once a day for four days) reduced dental caries on the prematurely exposed teeth significantly. Laser irradiation after the treatment with 2% NaF on the prematurely exposed teeth inhibited dental caries incidence significantly, compared with NaF treatment or laser irradiation only. These results suggest that c. w. Nd: YAG laser irradiation is effective in preventing dental caries.View full abstractDownload PDF (2746K) -
2. Secular Changes in Mean Numbers of dmf Primary Teeth in 3-year-old Japanese Children by PrefecturesKohko OSADA, Tsuyoshi KATAYAMA, Takashi UJIIE, Shogoro OKADA1987 Volume 37 Issue 1 Pages 57-62
Published: 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSTime-related trends in the prevalence of dental caries in 3-year-old Japanese children were determined by employing the Annual Statistics of Dental Health Checkup for 3-year-olds, extending over a span of two decades from 1963 to 1983 by prefectures. Geographic distribution of caries prevalence was compared at two-year intervals in computing mean numbers of dmf primary teeth. A significant increase in mean dmf was statistically observed during the first decade (1963-1972) without any consistent geographic variations. A substantial decline of caries experience among 3-year-old children has been seen since 1975 throughout the country, but marked geographic difference in caries prevalence has remained. Caries prevalence was much higher in the regions of Hokkaido, Tohoku, Kyushu, and Okinawa, ranging from 4.1 to 5.9 dmf per child, as compared to the nationwide figure of mean dmf (3.4) in 1983.View full abstractDownload PDF (1966K) -
Mizuo KANI, Tokuko KANI, Shintaro IINO, Akiko HIROSE, Atsunori ISOZAKI ...1987 Volume 37 Issue 1 Pages 63-71
Published: 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSThe purpose of this study was to investigate the effect of ammonium titanium fluoride solution on rat caries, in comparison with that of acidulated phosphate fluoride solution (APF). Eighteen-day-old male Sprague-Dawley rats were randomly distributed among three groups. Each animal was infected with S. mutans GS-5 for three days and fed a cariogenic diet (Diet 2000 No. 3) during the experimental period. The first group received APF (0.9 % of F, pH 3.4), the second group received (NH4) 2TiF6 (0.9 % of F, pH 3.4), and the third group served as a control. Each animal was weighed, and given topical application of the solution once a week under anaesthesia. At 54, 68, 82 and 96 days of age, animals were killed, and caries prevalence was examined by assigning occlusal fissure lesions to 6 grades using a standardized photograph (x 50) of the rat jaw. Caries score (caries incidence and caries extent) were calculated from these data. The distributions of calcium, phosphorous, fluoride and titanium in enamel were determined by electron microprobe analysis.
Caries incidence was not clearly reduced in the fluoride groups compared with the control. However, significantly lower value of caries extent was found in the fluoride groups than in the control. The fluoride groups had very few serious grades of lesion, whereas the control had many collapsible lesions. There was no significant difference between the effect of APF and (NH4) 2TiF6 An enriched zone of fluoride and titanium was observed at the entrance of enamel fissures in the group treated with (NH4) 2TiF6, but at the bottom of enamel fissures, fluoride and titanium were difficult to detect. During the experimental period, the treatments did not affect the weight gains of the rats in any group. It is concluded that the topical application of (NH4) 2TiF6 leads to uptake of fluoride and titanium into the enamel surface in vivo, and is as effective in preventing caries in rats as APF, especially in inhibiting caries progression.View full abstractDownload PDF (2964K) -
Makoto SHINOMIYA, Keiko MITANI, Nobuko KITAMURA, Haruo NAKAGAKI, Yukit ...1987 Volume 37 Issue 1 Pages 72-73
Published: 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSDownload PDF (1920K)
- |<
- <
- 1
- >
- >|