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Title: 1416 - Etching Time Influence on Compression Resistance of Lithium Disilicate Ceramic

Authors:

Camila Libardi (Presenter)
Bauru School of Dentistry - University of São Paulo

Bhenya Tostes, Bauru School of Dentistry - University of São Paulo
Juliana Bombonatti, Bauru School of Dentistry - University of São Paulo
Adilson Furuse, Bauru School of Dentistry - University of São Paulo
Rafael Mondelli, Bauru School of Dentistry - University of São Paulo

Abstract:

Objectives: The present in vitro study aimed to analyze the influence of three etching times with 10% hydrofluoric acid (HF) on the compression resistance of ceramic plates cemented to bovine enamel teeth.

Methods: Sixty square ceramic plates (5x5mm, 1mm thick) were obtained (IPS E-max Press) and etched for 10, 20 and 60s, respectively, with 10% HF (Dentsply). These plates were cemented with RelyX ARC dual cement (80 μm of line) on the enamel surface using two different adhesive systems [RelyX Ceramic Primer Silane + Single Bond (R) and Single Bond Universal (U)]. They were divided according to the etching time and adhesive system into 6 groups (n=10): 10R, 20R, 60R, 10U, 20U and 60U. After 24h, the specimens were submitted to compression testing in Kratos, 0.5 mm/min, 50Kgf. The results were analyzed by two way ANOVA and Tukey Tests (α=0.05).

Results: The compression test presented the following values for the R groups: 10R (869.8±122N a), 20R (795.0±219N ab), 60R (772.7±162N b). And U groups: 10U (879.3±159N a), 20U (852.3±227N ab), 60U (704.0±235N b).

Conclusions: The increase of the surface conditioning time of the lithium disilicate based ceramic showed light decrease to the compressive strength.

Student Presenter

This abstract is based on research that was funded entirely or partially by an outside source:
CAPES - Coordenação de Aperfeiçoamento de Pessoal do Ensino Superior

Disclosure Statement:
The submitter must disclose the names of the organizations with which any author have a relationship, the nature of the relationship, and the clinical or research area involved. The following is submitted: NONE

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