Microleakage in conservative cavities varying the preparation method and surface treatment

Authors

  • Juliana Abdallah Atoui University of São Paulo; Ribeirão Preto Dental School; Department of Restorative Dentistry
  • Michelle Alexandra Chinelatti University of São Paulo; Ribeirão Preto Dental School; Department of Restorative Dentistry
  • Regina Guenka Palma-Dibb University of São Paulo; Ribeirão Preto Dental School; Department of Restorative Dentistry
  • Silmara Aparecida Milori Corona University of São Paulo; Ribeirão Preto Dental School; Department of Restorative Dentistry

DOI:

https://doi.org/10.1590/S1678-77572010000400017

Keywords:

Dental air abrasion, Dental cavity preparation, Marginal adaptation, Dental etching

Abstract

OBJECTIVE: To assess microleakage in conservative class V cavities prepared with aluminum-oxide air abrasion or turbine and restored with self-etching or etch-and-rinse adhesive systems. Materials and Methods: Forty premolars were randomly assigned to 4 groups (I and II: air abrasion; III and IV: turbine) and class V cavities were prepared on the buccal surfaces. Conditioning approaches were: groups I/III - 37% phosphoric acid; groups II/IV - self-priming etchant (Tyrian-SPE). Cavities were restored with One Step Plus/Filtek Z250. After finishing, specimens were thermocycled, immersed in 50% silver nitrate, and serially sectioned. Microleakage at the occlusal and cervical interfaces was measured in mm and calculated by a software. Data were subjected to ANOVA and Tukey's test (α=0.05). RESULTS: Marginal seal provided by air abrasion was similar to high-speed handpiece, except for group I. There was SIGNIFICANT difference between enamel and dentin/cementum margins for to group I and II: air abrasion. The etch-and-rinse adhesive system promoted a better marginal seal. At enamel and dentin/cementum margins, the highest microleakage values were found in cavities treated with the self-etching adhesive system. At dentin/cementum margins, high-speed handpiece preparations associated with etch-and-rinse system provided the least dye penetration. CONCLUSION: Marginal seal of cavities prepared with aluminum-oxide air abrasion was different from that of conventionally prepared cavities, and the etch-and-rinse system promoted higher marginal seal at both enamel and dentin margins.

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Published

2010-08-01

Issue

Section

Original Articles

How to Cite

Microleakage in conservative cavities varying the preparation method and surface treatment . (2010). Journal of Applied Oral Science, 18(4), 421-425. https://doi.org/10.1590/S1678-77572010000400017