Bond strength of lithium disilicate after cleaning methods of the remaining hydrofluoric acid.

Autor:	Dos Santos DM; DDS, PhD, Professor, Department of Dental Materials and Prosthodontics, Sao Paulo State University (UNESP), Araçatuba, Sao Paulo, Brazil., Bitencourt SB; DDS, MSc, PhD student, Department of Dental Materials and Prosthodontics, Sao Paulo State University (UNESP), Araçatuba, Sao Paulo, Brazil., da Silva EV; DDS, MSc, PhD student, Department of Dental Materials and Prosthodontics, Sao Paulo State University (UNESP), Araçatuba, Sao Paulo, Brazil., Matos AO; DDS, MSc, PhD Student, Department of Prosthodontics and Periodontology, University of Campinas (UNICAMP), Piracicaba, Sao Paulo, Brazil., Benez GC; DDS, Department of Dental Materials and Prosthodontics, Sao Paulo State University (UNESP), Araçatuba, Sao Paulo, Brazil., Rangel EC; PhD, Professor, Laboratory of Technological Plasmas, São Paulo State University (UNESP), Sorocaba, Sao Paulo, Brazil., Pesqueira AA; DDS, PhD, Professor, Department of Dental Materials and Prosthodontics, Sao Paulo State University (UNESP), Araçatuba, Sao Paulo, Brazil., Barão VA; DDS, PhD, Professor, Department of Prosthodontics and Periodontology, University of Campinas (UNICAMP), Piracicaba, Sao Paulo, Brazil., Goiato MC; DDS, PhD, Professor, Department of Dental Materials and Prosthodontics, Sao Paulo State University (UNESP), Araçatuba, Sao Paulo, Brazil.
Jazyk:	angličtina
Zdroj:	Journal of clinical and experimental dentistry [J Clin Exp Dent] 2020 Feb 01; Vol. 12 (2), pp. e103-e107. Date of Electronic Publication: 2020 Feb 01 (Print Publication: 2020).
DOI:	10.4317/jced.56412
Abstrakt:	Background: Different ceramic surface cleaning methods have been suggested after the acid conditioning. The aim was to evaluate the effect of different protocols used to remove the remaining hydrofluoric acid on the shear bond strength (SBS) between lithium disilicate and resin cement. Material and Methods: Forty-four specimens of lithium disilicate (IPS e.max Press) were divided in 4 groups (n=11): group C (control, no treatment); group HF+S (5% hydrofluoric acid + silane); group HF+US+S (5% hydrofluoric acid + ultrasound cleaning + silane); group HF+PH+S (5% hydrofluoric acid + 37% phosphoric acid + silane). Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were performed to characterize the surface morphology. The SBS test was performed on the resin/ceramic interface, and the failure mode was characterized. SBS values were submitted to 1-way ANOVA and the Tukey test (α=.05). The relation between surface treatment and failure modes was analyzed using the chi-squared test (α=.05). Results: The surface treatment type interfered in the shear strength ( p <.001) and higher SBS values were observed for the groups HF+US+S (17.87 MPa) and HF+PH+S (16.37 MPa). The surface treatment did not influence the failure mode ( p =.713). No fluorsilicate salts were observed after ultrasound cleaning. Conclusions: The utilization of ultrasound cleaning was an effective procedure to remove remaining fluorsilicate salts, promoting the highest SBS values. Key words: Bond strength, ceramics, fluorsilicate, lithium disilicate, resin cement. Competing Interests: Conflicts of interest The authors have declared that no conflict of interest exist. (Copyright: © 2020 Medicina Oral S.L.)
Databáze:	MEDLINE
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