摘要:

An independent longitudinal retrospective analysis of the timing, number, and cost of tooth restorations was conducted for all subjects (n= 313) in the age cohort of a municipal health center, in which two consecutive field trials of up to 3 years on the caries-preventive effect of the use of xylitol chewing gum were conducted (Ylivieska study, 1982-85). A computer program calculated the post-eruptive timing of the first restorations on each permanent tooth surface, and survival analysis methods were applied before, during, and after the trials. The cost of restorations was then calculated. The total number of new restored surfaces was 4.0 per child in the xylitol group and 9.3 in the controls during the decade after onset of the trial. The number of restorations on the occlusal surfaces of the first molars leveled off at 40-50% in the xylitol group and at about 60-70% in the control group. Plateaus for the second molars were at 30-40% and 60-70%, respectively. The time lag for the first restorations was longer in the xylitol group for the proximal and other smooth surfaces. A marked difference in favor of the xylitol group was observed in the proximal surfaces of the upper incisors (for example, the mesial surface of the upper mesial incisor for girls: log-rank chi-square = 11.1,p<0.001). The preventive effect was most pronounced in teeth that had erupted during the trial. This analysis indicated that participation of subjects in the xylitol chewing gum trials resulted in a significant reduction in the number of first restorations and hence in costs during the decade after the onset of gum use.

ISSN:0001-6357    

DOI:10.3109/00016359609003526

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

摘要:

Oral mucosal changes and associated factors were studied among male industrial workers in southern Finland. Two groups, with or without access to an employer-provided dental benefit scheme, were compared. A multiple-choice questionnaire followed by clinical examinations was completed by 325 (81%) subsidized workers and 174 (69%) controls. In both groups 52% of the subjects had some oral mucosal change, and there were no significant differences between the groups in the location distribution of the changes. Smoking was significantly associated wim redness of the oral mucosa (p<0.001), coating (p<0.001), and leukoplakia (p<0.01), whereas denture wearing was associated wim ulcers (p<0.05), hyperplasia (p<0.001), and redness (p<0.001). Among denture wearers non-acceptable dentures were significantly associated with hyperplasia (p<0.001). The subsidized group had better dentures, although this did not significantly benefit their oral mucosal status.

ISSN:0001-6357    

DOI:10.3109/00016359609003527

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

摘要:

The aim of this study was to investigate the fluoride release and uptake characteristics of a composite resin (Tetric) and two orthodontic adhesives (VP 862 and Saga Bond), with a type-II glass ionomer cement (Ketac Fil) as a control. Test specimens in 2 ml deionized water released fluoride over a period of 33 days. Ketac Fil released 54 and 15 times more fluoride than Tetric after 24 h and 1 month, respectively, whereas the two adhesives released amounts between these values. Specimen exposure to 1000-ppm NaF solution increased the 24-h fluoride release from all materials, with near pre-exposure levels reached after 2-3 days. Ketac Fil had a tendency to recharge not seen with the other materials. The ytterbium trifluoride filler in Tetric has a very low water solubility, and it is therefore suggested that the increases in fluoride release from Tetric after exposure to fluoride were most probably due to release of surface-retained fluoride.

ISSN:0001-6357    

DOI:10.3109/00016359609003528

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

摘要:

The precision of a new procedure predicting skeletal maturity on the basis of frontal sinus development was tested in 59 boys with an Angle class-II division-1 malocclusion. Lateral head films were used for the analysis of frontal sinus development, and handwrist radiographs were used for the assessment of skeletal maturity. The results showed that skeletal maturity could be predicted with a certainty of about 85% when using a 1-year prediction interval and widi a certainty of about 75% when using a 2-year prediction interval. In conclusion, the study showed that skeletal maturity can be predicted with rather high accuracy by means of the analysis of frontal sinus development as imaged on lateral headfilms.

ISSN:0001-6357    

DOI:10.3109/00016359609003529

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

摘要:

This study was designed to investigate the effect of parental dental health behavior on that of their adolescent offspring. The data stemmed from The Norwegian Longitudinal Health Behavior Study performed in 1993 in the County of Hordaland in Norway and comprised separate questionnaires for both parents and a 16-year-old child in 436 family units. A compound measure of parental dental health behavior was applied in logistic regression analyses. The results showed mat there were statistically significant associations of use of dental floss, tooth brushing, and drinking of non-sugared mineral water among parents and their adolescent offspring. No significant gender interaction in the association between same- or different-sex parent-adolescent dyads was observed. These findings indicate mat parents function as social models for their offspring well into the adolescent period with regard to several dental health behaviors.

ISSN:0001-6357    

DOI:10.3109/00016359609003530

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

摘要:

The dental health of 392 Estonian schoolchildren aged 14-17 years (197 in Tartu and 195 in Tallinn) was studied. In Tartu only 1 child had lost teeth because of caries, as against 30 in Tallinn. Clinically caries-free dentitions were found in 15% of the children in Tartu and in 3% in Tallinn. The mean DMFT value was 3.7 in Tartu and 7.0 in Tallinn, being higher among girls in both cities. The mean DT value was 1.0 in Tartu and 2.6 in Tallinn. All subjects examined had a gingival bleeding index (GBI) higher than zero. The mean GBI was 20% in Tartu and 18% in Tallinn.

ISSN:0001-6357    

DOI:10.3109/00016359609003531

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

摘要:

As part of a wider investigation of malocclusion, the aim of this study was to determine the prevalence of gingivitis in 6-year-olds in Reykjavik. Parents and guardians of the 401 children in 8 schools were invited by letter to have their children take part. There were 230 positive replies (57%). The Gingival Bleeding Index was used to determine the condition of the gingiva on mesiobuccal and buccal surfaces of 6 selected teeth (totaling 12 surfaces). The results showed that 26% had healthy gingivae, 23% showed bleeding from one surface, 20% from two, 17% from diree, and 15% from four to eight surfaces. There were no statistically significant differences in the number of bleeding surfaces between boys and girls. The mean GBI for the whole group was 16%. Gingivitis in this group was therefore prevalent but usually slight.

ISSN:0001-6357    

DOI:10.3109/00016359609003532

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

摘要:

The prevalence of caries and caries risk factors was studied among 120 consecutively hospitalized elderly persons. Coronal caries was recorded using the WHO criteria, and active and inactive root caries in accordance with Fejerskov et al. The CPITN was used to evaluate the periodontal state and plaque accumulation in accordance with Löe&Silness. Of the 1212 teeth examined 5% had active coronal caries (2% inactive), 14% active root caries (2% inactive), and 10% fillings with recurrent caries. No relationship was found between caries prevalence, degree of dependence, number of medicaments, age, and gender, Patients with psychiatric diseases had increased caries prevalence (P<0.01), and lower caries prevalence was associated with frequent tooth brushing (P<0.05). At the tooth level root caries was associated with high plaque scores (P<0.001), degree of gingival recession (P<0.001), presence of coronal caries (P<0.001), and increased pocket depth (P<0.01). The results strongly indicate that oral hygiene measures should be introduced immediately after hospitalization of these patients.

ISSN:0001-6357    

DOI:10.3109/00016359609003533

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

摘要:

The aim of the study was to determine, in a randomly selected 20- to 70-year-old Swedish population, the prevalence of oral burning sensations and taste disturbances and their possible correlation to salivary factors, the presence of mandibular dysfunction, the prevalence of teeth, restorative procedures, caries and periodontal disease, and smoking habits. Of a total of 533 dentate individuals, 112 reported a total of 139 symptoms. Eleven of the 40 edentulous individuals reported a total of 14 symptoms. Burning sensations were reported by 18 (3.4%) of the dentate and 1 (2.5%) of the edentulous individuals. The symptoms of pricking and burning were significantly correlated to mandibular dysfunction and negatively correlated to the number of teeth. The symptom of bad taste was correlated to the number of amalgam-filled surfaces and to cigarette smoking. No other statistically significant correlation could be found.

ISSN:0001-6357    

DOI:10.3109/00016359609003534

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

摘要:

The material consisted of 527 randomly selected children and adolescents from the community of Jönköping, Sweden, who in 1983 reached the age of 3, 5, 10, 15, or 20 years. The degree of incisal or occlusal tooth wear was evaluated for each single tooth in accordance with the following criteria: score 0 = no wear or negligible wear of enamel; score 1 = obvious wear of enamel or wear through the enamel to the dentin in single spots; score 2 = wear of the dentin up to one-third of the crown height; and score 3 = wear of the dentin more than one-third of the crown height. In the age groups 3 and 5 years the primary dentition was studied, and in the age groups 10, 15, and 20 years the permanent dentition. In the 3-year-old children 63% and in the 5-year-olds 19% had no or slight incisal or occlusal wear in the primary dentition. In the permanent dentition the corresponding figures for the 10-, 15-, and 20-year-olds were 78%, 51%, and 35%, respectively. The 5-year-olds had the highest percentage of primary teeth with incisal or occlusal wear related to existing teeth in accordance with criteria 1-3 (32.2%), and the 10-year-olds had the lowest score for permanent teeth (2.5%). There were small or no differences in tooth wear between the sexes in these age groups. Eighteen children (17%) among the 5-year-olds had one or more teeth with wear scored 2 in the primary dentition, and one individual had 4 primary teeth scored 3. The corresponding figures for the 3-, 10-, 15-, and 20 year-olds were 2%, 1%, 7% and 6%, respectively. No permanent teeth with wear scored 3 were found in these age groups. The number of teeth with incisal or occlusal wear increased with age both in the primary and in the permanent dentition.

ISSN:0001-6357    

DOI:10.3109/00016359609003535

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor