ABSTRACT
Objective@#To evaluate and compare the caries prevention effectiveness of a resin-based sealant and a glass ionomer sealant on permanent first molars in 7- to 9-years-old school children.@*Methods@#A randomized controlled, examiner-blinded, 5-year clinical trial was conducted in 19 primary schools in Dalian, Liaoning province. Totally 419 children (with 664 first molars) who had at least one sound permanent first molar with deep fissures or fissures with signs of non-cavitated lesions were recruited and stratified and allocated randomly into three parallel groups. A resin-based sealant was used in Group R (136 children with 219 first molars) and a glass ionomer sealant was used in Group G (130 children with 218 first molars). The third group (Group N, 153 children with 227 first molars) with none of the two sealants applied was served as blank control. Follow-up examinations were conducted at 0.5, 1, 2, and 5 years after sealing in order to assess the retention of the sealants and the incidence of caries occurrence. Chi-square test was adopted to compare the differences of caries incidence among the 3 groups. Generalized estimating equations (GEE) was used to analyze the effective factors of caries incidence.@*Results@#During the 5-year follow-up period, 13.4% (23/172) of the teeth in Group R, 22.5% (40/178) of the teeth in Group G and 34.5% (57/165) of the teeth in Group N were diagnosed as having developed cavitated lesions. And the differences in the incidence of caries among the three groups was statistically significant (P<0.05). According to GEE, the resin-based sealant and the glass ionomer sealant were found to be the protection factors and the non-cavitated lesion before sealing was found to be the risk factor. The resin-based sealant was found to be the protection factor to the glass ionomer sealant when the blank control group was removed.@*Conclusions@#Both resin-based sealant and glass ionomer sealant could effectively prevent the permanent first molars from the occurrence of carious lesions in 5 years. The resin-based sealant was superior to the glass ionomer sealant in caries prevention.
ABSTRACT
Objective:To investigate the prevalence and related factors of dental caries in 3-year-old children in the Development District in Dalian.Methods:A multi-stage,randomized,cluster sampling method was used in the cross-sectional study.All 3-year-old children in the selected 15 kindergartens were invited to take part in the oral health examination conducted by 3 calibrated examiners.The WHO recommended caries diagnosis criteria were used.The structured questionnaire including the information of children's oral hygiene habits,dietary habits,parents' oral health knowledge and socioeconomic status was completed by the parents.Results:1 220 3-year-old children completed the clinical oral examination and 964 children's parents(79.0％) finished the questionnaire.The caries prevalence in 3-year-old children was 62.8％,and the mean dmft and dmfs scores were 3.40 and 7.34,respectively.No differences in the prevalence of caries,mean dmft and dmfs scores were found between boys and girls(P ＞0.05).Logistic regression analysis showed that the frequency of sweets and sugar-containing beverages consumption(P＜0.05),parents'education level(P＜0.05) were significantly related to the caries prevalence.Conclusion:The prevalence and severity of dental caries in 3-year-old children in Dalian Development District were high and the frequency of consumption sugar-containing foods and beverages,parents'education level were related to the decay prevalence.
ABSTRACT
<p><b>OBJECTIVE</b>To evaluate the effectiveness of resin-based sealants and glass ionomer sealants on caries prevention in the first permanent molars.</p><p><b>METHODS</b>A randomized controlled, examiner-blinded, 2-year clinical trial with parallel groups was conducted. A total of 419 children (664 first molars) who had at least one sound first permanent molar with deep fissures or fissures with signs of non-cavitated lesions were recruited. They were randomly allocated into three groups.Helioseal F, a light-cured resin-based sealants was used in group R (136 children with 219 first molars). FUJI VII, a light-cured glass ionomer sealants was used in group G (130 children with 218 first molars) and group N (153 children with 227 first molars) was blank control.Follow-up examinations were conducted at 6, 12, and 24 month after sealing to examine the sealants retention and caries incidence. Chi-square test was used to compare the differences of caries incidence among the 3 groups.Generalized estimating equations (GEE) was used to analyze the effective factors of caries incidence.</p><p><b>RESULTS</b>During the 2-year follow-up period, 3.0% (6/197) of the teeth in group R, 6.7% (13/193) of the teeth in group G, and 14.7% (29/197) of the teeth in group N were diagnosed as having developed a cavitated lesion. The difference in the incidence of caries among the three groups was significant(P < 0.05). No significant difference in caries incidence was found between group R and group G (P > 0.05). The tooth-level preventive fractions were 79.6% for resin-based sealants and 54.4% for glass ionomer sealants, respectively.</p><p><b>CONCLUSIONS</b>Both resin-based sealants and glass ionomer sealants can effectively prevent the incidence of caries in the first permanent molars. The two sealants have similar caries prevention effect.</p>