| Full text | |
| Author(s): |
Adriana Gama-Teixeira
[1]
;
Maria Regina Lorenzeti Simionato
[2]
;
Silvia Nagib Elian
[3]
;
Maria Angela Pita Sobral
[4]
;
Maria Aparecida Alves de Cerqueira Luz
[5]
Total Authors: 5
|
| Affiliation: | [1] University of São Paulo. School of Dentistry. Department of Operative Dentistry
[2] University of São Paulo. Institute of Biomedical Sciences. Department of Microbiology
[3] University of São Paulo. Institute of Mathematics and Statistics. Department of Statistics
[4] University of São Paulo. School of Dentistry. Department of Operative Dentistry
[5] University of São Paulo. School of Dentistry. Department of Operative Dentistry
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | Brazilian Oral Research; v. 21, n. 4, p. 368-374, 2007-12-00. |
| Abstract | |
The aim of this study was to define, in vitro, the potential to inhibit secondary caries of restorative materials currently used in dental practice. Standard cavities were prepared on the buccal and lingual surfaces of fifty extracted human third molars. The teeth were randomly divided into five groups, each one restored with one of the following materials: glass ionomer cement (GIC); amalgam; light-cured composite resin; ion-releasing composite; and light-cured, fluoride-containing composite resin. The teeth were thermocycled, sterilized with gamma irradiation, exposed to a cariogenic challenge using a bacterial system using Streptococcus mutans, and then prepared for microscopic observation. The following parameters were measured in each lesion formed: extension, depth, and caries inhibition area. The outer lesions developed showed an intact surface layer and had a rectangular shape. Wall lesions were not observed inside the cavities. After Analysis of Variance and Component of Variance Models Analysis, it was observed that the GIC group had the smallest lesions and the greatest number of caries inhibition areas. The lesions developed around Amalgam and Ariston pHc restorations had an intermediate size and the largest lesions were observed around Z-100 and Heliomolar restorations. It may be concluded that the restorative materials GIC, amalgam and ion-releasing composites may reduce secondary caries formation. (AU) | |