Caries-preventive effect of sealants produced with altered glass-ionomer materials, after 2 years.
OBJECTIVE
The aim of the present study was to investigate the caries-preventive effect of sealants produced with a high-viscosity glass-ionomer with an elevated powder-liquid ratio (ART), of having energy added to this glass-ionomer, and that of glass-carbomer, in comparison to that of resin composite sealants.


METHODS
The randomized controlled trial covered 407 children, with a mean age of 8 years. At a school compound three dentists placed sealants in pits and fissures of high caries-risk children. Evaluation by two independent evaluators was conducted after 0.5, 1 and 2 years. The Kaplan-Meier survival method, ANOVA and t-test were used in analyzing the data.


RESULTS
1352 first permanent molars were sealed. 6.6% of children and 6.8% of sealants dropped out within 2 years. 27 re-exposed pits and fissures, 20 in occlusal and 7 in smooth surfaces, in 25 children, developed a dentin carious lesion. The cumulative survival of dentin carious lesion-free pits and fissures in the glass-carbomer sealant group was statistically significantly lower (97.4%) than those in the high-viscosity glass-ionomer with energy supplied (99%) and the resin-composite (98.9%) sealant groups. There was no statistically significant difference in the cumulative survival of dentin carious lesion-free pits and fissures, between the high-viscosity glass-ionomer with (99%) and without (98.3%) energy supplied sealant groups, after 2 years.


CONCLUSIONS
The survival of dentin carious lesion-free pits and fissures was high in all sealant types. More dentin carious lesions were observed in the glass-carbomer sealant group.
Preventive Department, Key Laboratory for Oral Biomedical Engineering, School and Hospital of Stomatology, Wuhan University, PR China.
X
X
Chen
M Q
MQ
Du
M W
MW
Fan
J
J
Mulder
M C D N J M
MC
Huysmans
J E
JE
Frencken
D000180:Acrylic Resins / Q000737:chemistry; D002626:Chemistry, Pharmaceutical; D002648:Child; D003188:Composite Resins / Q000737:chemistry / Q000627:therapeutic use; D004245:DMF Index; D003731:Dental Caries / Q000517:prevention & control*; D003733:Dental Caries Susceptibility; D003750:Dental Fissures / Q000517:prevention & control; D003804:Dentin / Q000473:pathology; D005500:Follow-Up Studies; D005898:Glass / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry / Q000627:therapeutic use*; D006801:Humans; D055115:Light-Curing of Dental Adhesives; D008422:Materials Testing; D008963:Molar / Q000473:pathology; D010895:Pit and Fissure Sealants / Q000737:chemistry / Q000627:therapeutic use*; D016019:Survival Analysis; D014783:Viscosity
D000180:Acrylic Resins; C500418:Clinpro Sealant; D003188:Composite Resins; D005899:Glass Ionomer Cements; C515713:Ketac Molar Easymix; D010895:Pit and Fissure Sealants; C479038:carbomer