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Background: Clinical studies comparing retention rates of pit and fissure sealants placed under Isolite, rubber dam, and cotton roll combined have not been conducted until now. Aim: To evaluate the retention rate of pit and fissure sealants (PFS) placed under three different isolation techniques (Isolite system [IS], rubber dam isolation [RDI], and cotton roll isolation [CRI]). Design: One hundred and forty‐four teeth from 48 children aged 6–15 years attending paediatric dental clinics at King Saud University in Saudi Arabia were randomized to receive three PFS using three isolation techniques. The children that met the inclusion criteria were randomized by a simple block random allocation method. All PFS were placed by an operator and evaluated by a blinded evaluator. The evaluation scores were recorded at baseline and followed up over a period of 12–22 months. Results: The children's mean age was 8.58 ± 1.93 years. Seven patients were lost to follow‐up. A total of 123 teeth were clinically evaluated; of these teeth, 22% had completely retained sealants, whereas approximately 66% had a partial loss of sealants, and approximately 12% had a complete loss of sealants. There were, however, no significant differences between the three isolation techniques on the retention rate of pit and fissure sealant. Conclusion: The types of isolation had no impact on the retention rate of pit and fissure sealant. [ABSTRACT FROM AUTHOR]

The purpose of the present study was to determine dental caries experience of 8-10-year-old schoolgirls in Riyadh city, and to assess the relationship between dental caries & dietary practices. This cross sectional study involved 522 third and fourth grade primary school girls attending 24 primary schools (12 public and 12 private) in Riyadh city. The selected girls were examined at schools by two calibrated examiners who were trained & calibrated prior to the study using the WHO criteria for the diagnosis of dental caries. Each selected schoolgirl was interviewed after the parents completed a 3-day dietary diary. Of the 522 schoolgirls examined, four hundred and fifty girls (86.2%) had dental caries, and only 72 (13.8%) were caries free. The mean dmft was 4.96 (±3.03) for the primary teeth, with more than half (51.7%) of the girls with caries had 5-8 decayed primary teeth. Only one-third of the carious primary teeth had restorations. The mean DMFT of the permanent molars was 2.44(±1.69). More than three-quarter (76.4%) of schoolgirls had dental caries in one or more of the permanent molars. Almost two thirds (59.2%) of the girls with caries had 3 to 4 of the permanent molars affected by caries. Out of the 399 schoolgirls who had one or more decayed permanent molar, only 41(10.3%) had a restoration in one or more of their permanent molars. The 3-day dietary diary showed that the majority of schoolgirls in this study consume sugar on moderate to high frequency basis. More than one-fourth (27.4%) of the sample brushed their teeth daily. About one-third of schoolgirls (N=161; 30.8%) did not visit a dentist at all. In conclusion; the dental caries prevalence was high in schoolgirls aged 8-10 years in Riyadh city. The dental caries was found to be associated with frequency of sugar consumption. [ABSTRACT FROM AUTHOR]