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Avaliação de lesões de carie adjacentes a restaurações com diferentes materiais, induzidas atraves de modelos quimico ou biologico

by Lobo, Maristela Maia

Abstract (Summary)
This study evaluated caries development around different restorative materials, by means of chemical and biological models to produce caries-like lesions. Cylindric cavities were prepared in 130 bovine slabs, which were randomly divided into six groups, according to the restorative treatment: G1 - zinc oxide temporary filling (Coltosol, n=30); G2 - silver amalgam (Permite C, n=20); G3 composite resin (Filtek Z250, n=20); G4 - glass ionomer cement (Fuji 11, n=20); G5 - resin modified glass ionomer (Vitremer, n=20); and G6 - polyacid modified resin (Dyract AP, n=20). Ten specimens of each group were submitted to ten days of pH-cycling (GQ, n=60), or were incubated with Streptococcus mutans for five days (GB, n=60). Control group (from G1, n=10) was not submitted to any caries induction (GC). After this period, mineral volume (%) was determined by means of cross-sectional microhardness, and carious lesion depth was measured in polarized light microscopy. Levels of water-insoluble glucans (WIG), inorganic phosphorus (Pi) and fluoride (F) were quantified in the biofilms formed over the tooth surfaces in GB group. Both caries induction models developed secondary caries. Cariostatic effect was provided by glass ionomer cement and resin modified glass ionomer, when compared to the other materials. There were no differences at F and WIG biofilm levels over restorative materials. However, there was an inverse relation between biofilm phosphorus content and caries inhibition potential
This document abstract is also available in Portuguese.
Bibliographical Information:

Advisor:Luiz Andre Freire Pimenta; Reginaldo Bruno Gonçalves; Luiz Andre Freire Pimenta [Orientador]; Pedro Luiz Rosalen; Monica Campos Serra

School:Universidade Estadual de Campinas

School Location:Brazil

Source Type:Master's Thesis

Keywords:caries dentarias fluor

ISBN:

Date of Publication:12/09/2003

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