Our website is currently undergoing maintenance. Article records and full texts remain available. Submissions can be made through the Editorial Manager.

Effect of Pretreatment Methods and Composite Repair Materials on the Repair Bond Strength of Resin Nanoceramics: An In Vitro SEM Analysis

S.A. Alqahtani, A.Y. Alsaeed, M.H.D. Al Wadei, S. Shafqat, R. Batool, K. Bhutto

Journal of Ceramic Science and Technology, Vol. 16, No. 4 (2025), pp. 239-245

DOI: 10.4416/JCST2025-00003

Download full article (PDF)

Abstract

AIMS To investigate the effect of different conditioning regimes, that is diamond bur (DB) grinding, sandblasting (SB), and Er, Cr: YSGG laser (ECL) at different pulse modes (long and short), on the surface roughness (Ra) and repair bond strength (RBS) of resin nanoceramics (RNCs) to different viscosity composites.METHODS 104 RNC discs were prepared and classified into four groups based on the surface pretreatment protocol (n = 26) Group 1 DB, Group 2 SB, Group 3 (ECL-short pulse), and Group 4 (ECL-long pulse). Five discs from each group underwent Ra assessment. SEM was used to assess the surface topographic changes. Twenty samples from each cohort were divided into two subgroups based on the composite types: micro-hybrid composite and low-viscosity injectable composite. ANOVA and Tukey HSD test were used to analyze the statistical difference among different groups tested for Ra and RBS.RESULTS The highest value for Ra was observed in the SB group. The lowest Ra was indicated in the ECL-long pulse group. Maximum RBS was observed in Group 2B (SB+Injectable). The lowest scores were displayed by Group 4A (ECL (long pulse)+micro hybrid)CONCLUSION SB and ECL along with low-viscosity injectable composite can be considered suitable surface conditioners and restorative materials for repairing fractured resin nano-ceramic.

Keywords

Diamond bur, sandblasting (SB), surface roughness, repair bond strength, SEM

View this issue · Article & DOI index