The effect of Er, Cr:YSGG laser debonding on the bond strength of two ceramic materials to dentin.

Autor: Abdel Sadek HM; Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Organization of African Unity St, El-Qobba Bridge, El Weili, Cairo, Egypt. hodasadek@dent.asu.edu.eg., Abdel Khalek AM; Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Organization of African Unity St, El-Qobba Bridge, El Weili, Cairo, Egypt.; General Organization of Teaching Hospitals and Institues, Cairo, Egypt., Wahsh MM; Department of Fixed Prosthodontics, Faculty of Dentistry, Galala University, Ain Shams University, Cairo, Egypt.
Jazyk: angličtina
Zdroj: BMC oral health [BMC Oral Health] 2023 Jan 12; Vol. 23 (1), pp. 17. Date of Electronic Publication: 2023 Jan 12.
DOI: 10.1186/s12903-023-02721-9
Abstrakt: Objectives: Evaluating the bond strength of two ceramic materials to dentin after Er,Cr:YSGG laser debonding. Would laser debonding affect the bond strength of ceramic to dentin?
Materials and Methods: Recently extracted human molars were ground to expose dentin. Forty square shaped samples were prepared from CAD/CAM ceramic blocks. Samples were divided into two groups according to the type of ceramic material; group E: Lithium disilicate and group T: Ultra-translucent Zirconia (n = 20) Each group was divided into two subgroups (n = 10) according to the laser debonding effect (subgroup B: bonded samples, subgroup R: re-bonded samples after laser debonding). Ceramic samples were bonded to dentin using dual cure self-adhesive resin cement. Laser debonding of ceramic samples of subgroups R using Er, Cr:YSGG laser, were then re-bonded again to dentin surface with same resin cement. The Shear bond strength test using Universal testing machine was done. The failure mode was analyzed. Two-way analysis of variance was used to compare the mean bond strength and re-bond strength of two materials. The significance level was set at P ≤ 0.05.
Results: Two-Way ANOVA showed that ceramic type had a significant effect on the re-bond strength to dentin. The predominant failure mode was adhesive.
Conclusions: Laser debonding of Lithium disilicate and Ultra translucent Zirconia decreased the re-bond strength to dentin. Deterioration in re-bond strength for Lithium disilicate ceramics was more pronounced than for Ultra translucent Zirconia. Clinical Relevance Deterioration in the bond strength between ceramics & dentin after laser debonding still needs improvement to allow its clinical use.
(© 2023. The Author(s).)
Databáze: MEDLINE
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