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Effect of two restorative materials on root dentine erosion
Author(s) -
Domiciano Silvia Jorge,
Colucci Vivian,
Campos Serra Mônica
Publication year - 2010
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.31532
Subject(s) - glass ionomer cement , dentistry , materials science , indentation hardness , cement , root caries , dentin , composite material , medicine , microstructure
This study sought to evaluate the microhardness of root dentine adjacent to glass‐ionomer and composite resin restorations after erosive challenge. A crossover study was performed in two phases of 4 consecutive days each. One hundred twelve bovine root dentine slabs were obtained, and standardized box‐shaped cavities were prepared at center of each specimen. The prepared cavities were randomly restored with glass‐ionomer cement or composite resin. The slabs were randomly assigned among 14 volunteers, which wore intraoral palatal device containing four restored root dentin slabs. Starting on the second day, half of the palatal acrylic devices were immersed extraorally in a lemonade‐like carbonated soft drink for 90 s, four times daily for 3 days. After 3‐day wash‐out, dentine slabs restored with the alternative material were placed into palatal appliance and the volunteers started the second phase of this study. After erosive challenges, microhardness measurements were performed. Regardless of the restorative material employed, eroded specimens demonstrated lower microhardness value ( p < 0.0001). At eroded condition examined in this study, dentine restored with glass‐ionomer cement showed higher microhardness values ( p < 0.0001). It may be concluded that the glass‐ionomer cement decreases the progression of root dentine erosion at restoration margin. © 2010 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2010