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Volume 59 (2009)
- Issue 5 Pages 544-
- Issue 3 Pages 159-
- Issue 2 Pages 86-
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Volume 59, Issue 1
Displaying 1-7 of 7 articles from this issue
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ORIGINAL ARTICLE
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Takeshi NISHIYAMA, Youichi IIJIMA, Takahiko OHOArticle type: Article
2009 Volume 59 Issue 1 Pages 2-6
Published: January 30, 2009
Released on J-STAGE: March 30, 2018
JOURNAL FREE ACCESSThe remineralization of incipient caries lesions is enhanced by fluoride and/or various calcium phosphate complexes. The aim of this study was to evaluate the ability of a new calcium complex purified from bovine milk, micellar calcium phosphate-phosphopeptide (MCP-PP), to remineralize artificial caries-like lesions. Microradiography revealed that MCP-PP enhanced the remineralization of human subsurface enamel lesions. Next, we examined the acid resistance of the remineralized subsurface lesions. The remineralized samples treated with MCP-PP were stored in demineralizing solution for a day, and the mineral loss was calculated. In the MCP-PP group, the loss of mineral volume through acid challenge was less than that of the control group, implying that remineralized enamel specimens treated with MCP-PP are more resistant to acid attack than control specimens. The results suggest that MCP-PP is useful as a new calcium reservoir, which can be applied for dental caries prevention.View full abstractDownload PDF (627K) -
Takafumi OOKA, Kentaro ISHIKAWA, Naomichi MURATA, Akemi UTSUMI, Shouji ...Article type: Article
2009 Volume 59 Issue 1 Pages 7-15
Published: January 30, 2009
Released on J-STAGE: March 30, 2018
JOURNAL FREE ACCESSIt is known that anxiety levels of parents regarding the feeding activities of their children peak just after birth, and then such anxiety continues until 1 or 2 years old, when weaning is completed. The purpose of this study was to aid in the establishment of a new teaching and support system for babies and toddlers aiming not to improve existing organic aspects, but the oral function, and we also discussed the relationship between the anxiety of parents and the feeding and weaning status of babies and toddlers. The subjects were 290 babies and toddlers with their parents who received the dental consulting service of a certain ward. They were between 10 and 13 months old, including 152 boys and 138 girls. In this study, we conducted an interview-based investigation of the dietary status, including the weaning process and oral health condition.In the survey regarding devices for eating, the frequencies of bottle and straw use were higher than for other devices. Especially, straws were used by 10-month-old babies continually and more frequently than a cup. On the other hand, many parents had various questions regarding the oral condition, dental plaque control, and feeding. It is notable that parents with their first child often experienced anxiety. Additionally, it was considered that these questions and anxieties influenced feelings regarding the diet. In conclusion, it is considered that there is a marked need for multifaceted teaching and support including the dietary life and contents in the weaning period. Consequently, the prime objective is to establish a new teaching system for parents with babies and toddlers on the basis of their oral functional considerations.View full abstractDownload PDF (1138K) -
Shuuhei TOHMATSU, Tomoko OHSHIMA, Nobuko MAEDAArticle type: Article
2009 Volume 59 Issue 1 Pages 16-25
Published: January 30, 2009
Released on J-STAGE: March 30, 2018
JOURNAL FREE ACCESSH products containing sugar alcohol have been produced as foods without the inclusion of sucrose to prevent dental caries. We performed the following tests: acid productivity, synthesis of water-insoluble glucan, biofilm formation, and the inhibition of bacterial growth, of H and commercial products, and compared their cariogenic potential. Regarding the results of acid productivity involving Streptococcus mutans and Streptococcus sobrinus, H products did not lower the pH below 5.7 (pH 5.7〜6.5). The results for the synthesis of water-insoluble glucan showed that H products produced a smaller amount of water-insoluble glucan (2.2-6μg/ml) than the control (BHI broth with 5% sucrose: 34μg/ml; P<0.05). H products led to a lower level of biofilm formation by S. mutans than the control (P<0.05). The same tendency was observed in the results of biofilm formation by Candida albicans. H products showed the inhibition of S. mutans and C. albicans growth. The results of this study suggest that H products are effective to prevent dental caries.View full abstractDownload PDF (1240K) -
Masayuki KANEKO, Akihiro YOSHIHARA, Kayoko ITO, Naoko TAKANO, Yuki FUJ ...Article type: Article
2009 Volume 59 Issue 1 Pages 26-33
Published: January 30, 2009
Released on J-STAGE: March 30, 2018
JOURNAL FREE ACCESSAn oral health care program for improving oral function was started from 2006. The aim of the present study was to clarify the effectiveness of this program for improving the oral function as care prevention. We selected 55 subjects older than 65 years who participated in general health examinations and reported a poor oral status such as an impaired chewing function, feelings of suffocation while eating, and dry mouth. All subjects received oral hygiene instruction and oral function training four or six times over a period of three months. We compared the following variables at the baseline and 3 months later: oral hygiene status, oral functional status, and eating-related QOL (Quality of life). As a result, three months later, there was a significant improvement in the oral function status. In particular, the elapsed time on the repetitive saliva swallowing test (RSST) was 7.5±5.6, 16.2±9.7, and 25.7±14.7sec at the baseline, whereas, that at three months later was 5.6±3.1, 12.4±6.9, and 19.4±10.9sec. At three months later, there was a significant improvement in the elapsed time of the RSST on the second and third swallowing (p<0.01). These findings indicate that oral function training in elderly people improves feeding and swallowing functions. This effect, in turn, might improve the QOL of elderly.View full abstractDownload PDF (953K) -
Tomoko HAMASAKI, Shuji AWANO, Tetsuro KONOO, Inho SOH, Akihiro YOSHIDA ...Article type: Article
2009 Volume 59 Issue 1 Pages 34-41
Published: January 30, 2009
Released on J-STAGE: March 30, 2018
JOURNAL FREE ACCESSAlthough the frequency of caries and prevalence of white spot lesions have increased in orthodontic patients, little effort has been made to reduce the risk of dental caries in orthodontic patients in Japan. This study determined the factors related to increased dental caries and enamel demineralization in patients with fixed orthodontic appliances using a simplified caries risk test. Forty-nine patients with fixed appliances were studied for at least 10 months. The chi-square test was used to assess differences in caries risk factors between the baseline and during orthodontic treatment. The significance of differences with regard to the incidence of caries or white spot lesions in each group was ascertained using the chi-square test. The Mutans streptococci (MS) and Lactobacillus (LB) scores were significantly higher during orthodontic treatment compared with the baseline (p<0.01). The incidence of caries was significantly correlated with higher MS and LB scores at the baseline (p=0.008). Moreover, the MS score during orthodontic treatment was significantly associated with increased white spot lesions (p=0.049). In conclusion, we could predict the incidence of caries and increase in white spot lesions by performing a caries risk test before and during orthodontic treatment. This caries risk test should benefit orthodontic patients.View full abstractDownload PDF (1052K) -
Tamie OHASHI, Kohji OZAWA, Etsuko ISHIZU, Akiko HIROSE, Sachiko IWATA, ...Article type: Article
2009 Volume 59 Issue 1 Pages 42-50
Published: January 30, 2009
Released on J-STAGE: March 30, 2018
JOURNAL FREE ACCESSWhen teeth are ground using an air turbine handpiece, the dust generated may contain various bacteria and viruses. This can cause environmental pollution, and dental staff in dental clinics are exposed to the scattered dust. Therefore, it is important to remove the dust at its origin. In this study, the concentrations of scattered dust due to tooth grinding were examined at the center of a clinic and at three "chairside" locations: the respiratory orifices of a patient (phantom head), an assistant, and a dentist. We also examined the effect of an extra-oral vacuum aspirator on dust reduction. We measured the scattered dust concentrations by dust particle size using a total of four laser particle counters operating simultaneously. Our results suggested that the extra-oral vacuum aspirator was an effective method for removing approximately 76% or more of the dust that dentists and patients are exposed to. Sixty-five percent or more of the dust the assistant was exposed to was removed using the intra-oral vacuum aspirator ("vacuum" assistant). Thus, it was confirmed that the position of the extra-oral vacuum aspirator in this study was effective for reducing the dust exposure of patients, assistants, and dentists. However, the concentration of smaller was higher than that of larger dust particles. The dust removal rate was especially low for dust particles of φ 0.3-0.5μm. Dust of φ 5μm or more was not detected at the assistant's position. In the center of the clinic, we did not observe a decrease in the dust concentration due to the use of the extra-oral vacuum aspirator. We found that the tendency of dust scattering was different at the center of the clinic compared to the 3 chairside positions. The concentrations of the scattered dust and the dust removal rates at chairside positions were slightly different in our present study compared with those of our previous studies. In our previous study, measurements were not taken simultaneously, and we think this caused the differences in the results. In the present study, measurements were taken simultaneously at 4 locations. Thus, our present results more accurately reproduce the state of dust generated by tooth grinding in a clinical setting, and we believe they show high-level reliability.View full abstractDownload PDF (1161K) -
Mito YAMAMOTO, Kazuhiro IMASATO, Akihito TSUTSUI, Takashi HANIOKAArticle type: Article
2009 Volume 59 Issue 1 Pages 51-57
Published: January 30, 2009
Released on J-STAGE: March 30, 2018
JOURNAL FREE ACCESSThis study aimed to apply a self-management skill (SMS) scale to develop a brushing behavior skill scale. A 16-item preliminary brushing behavior skill scale was developed, which provided a program for the prevention of gingivitis suitable for elementary schools. The subjects were 57 children in the 5^<th> and 6^<th> grades. Eight items were selected based on the score and the correlations between each item, for inclusion in the final version of the brushing behavior skill scale. As shown by principal component analysis, the first principal component score was 47.2% and each item showed high factor loading (r>0.50). The brushing behavior skill score showed a significant correlation with the SMS score (r=0.43, p<0.01). In the following year, another group of 20 children was surveyed with the same eight item scale to examine the validity of the first set of results. The brushing behavior skill score showed a significant correlation with the SMS score (r=0.56, p=0.01). The findings indicate that the brushing behavior skill scale might be a useful instrument for research on the oral self-management skills of children regarding their brushing behavior.View full abstractDownload PDF (774K)
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