Resin-based Fissure Sealant Research Articles

Secondary caries-like lesions at fissure sealings with Xeno III and Delton—an in vitro study

The aim of the study was to establish a bacterial based in vitro caries model to test the caries preventive effect of fissure sealants and to investigate whether a self-etching adhesive (Xeno III) used as fissure sealant is equally effective in preventing secondary caries compared to a conventional sealant (Delton) when applied on saliva contaminated and non-contaminated fissures. Forty caries-free upper premolars were randomly divided into two groups. Group A was sealed with a conventional resin-based fissure sealant (Delton) after phosphoric acid etching. Group B was sealed with a self-etching adhesive (Xeno III) without prior etching. To simulate the clinical situation of saliva contamination, the distal part of each tooth was slightly moistened with saliva before sealant application. After thermo-cycling, the specimens were exposed to a cariogenic Streptococcus mutans biofilm in an artificial mouth model. Depths of demineralization were measured on serial sections by confocal laser scanning microscopy. If a demineralization was detected underneath the whole fissure sealing the sample was rated as 'total failure'. Significantly higher numbers of total failures could be found in the Xeno III group compared to the Delton group in areas without saliva contamination. On contaminated areas, no significant difference could be found. There was no significant difference regarding the depth of the primary carious lesions between groups. The study supports our recent findings that our caries model is capable to produce secondary caries-like lesions at fissure sealings. Based on the present in vitro data, it cannot be recommended to use the self-etching adhesive Xeno III solely as a fissure sealant.

Retention of a glass ionomer cement and a resin-based fissure sealant and effect on carious outcome after 7 years

The aim of this study was to compare the retention and caries preventive efficacy of glass ionomer (Fuji III; GIC) and light-cured resin-based (Delton; LCR) fissure sealants. One hundred and sixty-six 5-14-year-old schoolchildren received sealants on their newly erupted first or second molars; a split mouth design was used. Previously reported 2-year results showed low retention rates for GIC sealants, but no difference in the caries increment between the groups. The same persons were invited to a dental check-up 6.1 to 7.8 (mean 7.1) years after the application of sealants; 111 persons (66.8% of the original group) participated in the study. The retention of sealants, and the caries status of occlusal surfaces and adjacent proximal surfaces was recorded. On the sealed occlusal surfaces, 10% of GIC and 45% of LCR sealants were totally and 9% of GIC and 20% of LCR sealants partially present. Twenty-three (23.5%) of the occlusal surfaces sealed with GIC and 16 (16.5%) of those sealed with LCR were carious or filled. Compared to LCR sealants, the effectiveness of GIC sealants was -44% (95% CI -71%, -16%) and net gain -7% (95% CI -18%, 4%). The relative risk of caries occurring was 1.44 (95% CI 0.96, 2.14).

Retention of a glass ionomer cement and a resin-based fissure sealant and effect on carious outcome after 7 years

Retention of a glass ionomer cement and a resin-based fissure sealant and effect on carious outcome after 7 years

Glass ionomer and resin-based fissure sealants: A clinical study: Ingegerd Mejàre and Ivar A. Mjör Scand. J. Dent. Res. 1990;98:345–50

Glass ionomer and resin-based fissure sealants: A clinical study: Ingegerd Mejàre and Ivar A. Mjör Scand. J. Dent. Res. 1990;98:345–50