Last decennia much attention has been paid to improve the oral health of schoolchildren. The purpose of this study was to examine the present caries prevalence and the state of oral health of schoolchildren. Therefore 1.147 children from group 2 and group 8 of the primary school (6 and 12 years of age) in the province Drenthe were examined. Of the children 33% had caries and 13% had gingivitis. The highest percentages of caries were found in the low SES-group and among children that have education at schools for children with special needs. The study showed that these children brushed their teeth less often, they visited the dentist for the first time at an older age and they were eating many snacks. Children who had received an instruction in how to brush one's teeth, did not score better in the caries prevalence compared to children without previous instruction. Also the children whose parents had information about oral health, did not score better than the other children.
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OBJECTIVE: To evaluate the influence of abutment geometry on papillary fill in the esthetic zone in a delayed crown protocol.MATERIALS AND METHODS: Twenty-six subjects received two non-adjacent endosseous implants in the esthetic zone. Functional temporary crowns were installed 17-19 weeks later, using conventional (control) and curved (experimental) abutments. The abutments were randomized in each patient independently. Final crowns were cemented after 2 months (T0). Standard intraoral photographs and radiographs were made to evaluate papillary fill after 12 months (T12). The interproximal papilla fill was measured by means of the papilla index score (PIS) and related to the maximum bone level between the implant and the adjacent root as well as the peri-implant marginal bone level at T12, both measured radiographically.RESULTS: No statistically significant difference between the experimental and the control group could be demonstrated (P = 0.25). Ordinal regression analysis showed a positive correlation between the maximum bone level and papilla fill (P < 0.01) and a negative correlation between the peri-implant marginal bone level and papilla fill (P < 0.05).CONCLUSION: A concave abutment does not exhibit a better fill of the papilla compared with a straight abutment in single-tooth implant placement using a delayed protocol in the esthetic zone after 12 months of function.
OBJECTIVES: To evaluate the clinical performance of partial glass-ceramic (IPS e.max Press) posterior restorations.MATERIALS AND METHODS: A total of 765 restorations in 158 patients were placed between 2008 and 2018 and evaluated in a prospective study during regular dental care visits between 2015 and 2018. The restorations were luted with a conventional photo-polymerized resin composite (HFO) in conjunction with an Immediate Dentin Sealing procedure (IDS). Intra-oral photographs and radiographs were made and evaluated using USPHS criteria.RESULTS: The mean observation time was 53.3 months (range 3-113 months). Three absolute failures occurred (tooth fractures, n = 2; apical re-infection, n = 1) all leading to the loss of the restored tooth. Repairable and salvageable failures occurred in 9 teeth (endodontic complications, n = 7; secondary caries, n = 1; debonding, n = 1). The survival and success rates according to Kaplan-Meier after 5 years cumulated to 99.6% and 98.6%, respectively. Location (premolar/molar and mandibula/maxilla), pre-restorative endodontic status (vital/devitalised) and extension of the indirect ceramic restoration (number of sides and cusps involved) did not significantly affect the cumulative success rate (log rank test, p > 0.05). The condition of the vast majority of the restorations remained unaffected for 5 years.CONCLUSIONS: Partial glass-ceramic posterior restorations (pressed lithium disilicate (IPS e.max press, Ivoclar Vivadent) luted by means of a conventional photo-polymerized resin composite in conjunction with the use of an IDS procedure have an excellent medium-term prognosis.CLINICAL RELEVANCE: Partial glass-ceramic posterior restorations can be considered as a highly reliable treatment option. Location and extension of the restoration and pre-restorative endodontic status do not affect success rate.
