Effect of surface treatments on the bond strength of indirect resin composite to resin matrix ceramics

Abstract

PURPOSE The purpose of this study was to evaluate the shear bond strength (SBS) of an indirect resin composite (IRC) to the various resin matrix ceramic (RMC) blocks using different surface treatments. MATERIALS AND METHODS Ninety-nine cubic RMC specimens consisting of a resin nanoceramic (RNC), a polymer-infiltrated hybrid ceramic (PIHC), and a flexible hybrid ceramic (FHC) were divided randomly into three surface treatment subgroups (n = 11). In the experimental groups, untreated (Cnt), tribochemical silica coating (Tbc), and Neodymium-Doped Yttrium Aluminum Garnet (Nd:YAG) laser irradiation (Lsr) with 3 W (150 mJ/pulse, 20 Hz for 20 sec.) were used as surface treatments. An indirect composite resin (IRC) was layered with a disc-shape mold (2 × 3 mm) onto the treated-ceramic surfaces and the specimens submitted to thermal cycling (6000 cycles, 5 – 55℃). The SBS test of specimens was performed using a universal testing machine and the specimens were examined with a scanning electron microscope to determine the failure mode. Data were statistically analyzed with two-way analysis of variance (ANOVA) and Tukey HSD test (α=.05). RESULTS According to the two-way ANOVA, only the surface treatment parameter was statistically significant ( P <.05) on the SBS of IRC to RMC. The SBS values of Lsr-applied RMC groups were significantly higher than Cnt groups for each RMC material, ( P <.05). Significant differences were also determined between Tbc surface treatment applied and untreated (Cnt) PIHC materials ( P =.039). CONCLUSION For promoting a reliable bond strength during characterization of RMC with IRC, Nd:YAG laser or Tbc surface treatment technique should be used, putting in consideration the microstructure and composition of RMC materials and appropriate parameters for each material.

Micro-shear bond strengths of resin-matrix ceramics subjected to different surface conditioning strategies with or without coupling agent application

“…The results of this study confirm that the RMC material type had a significant influence on bond strength. However, this does not provide consistency with the results of a study by Çelik et al 40 reporting that RMC material type did not significantly cause alterations in bond strength values. They emphasized that only MSC strategy can become influential on bond strength.…”

“…Various surface conditioning strategies are recommended to create micro-porosities (transformed zone) on the bonding surface of the ceramics for better infiltration of the luting cement. 9 17 Supportively, Şişmanoğlu et al 39 and Çelik et al 40 reported favorable outcomes for the RMCs conditioned with different strategies. This is in accordance with the results of the current study as all surface-conditioned silane-free specimens demonstrated significantly higher µSBS values.…”

Repair bond strength and surface topography of resin‐ceramic and ceramic restorative blocks treated by laser and conventional surface treatments

“…With the same laser parameters, the μTBS we recorded for LU was 13.42 MPa and for VE was 1.53 MPa after 10,000 thermal cycling. In another study, it was reported that NY laser treated resin‐ceramic materials (Lava Ultimate, Vita Enamic and GC Cerasmart) showed significantly higher μTBS than control groups (Celik, Sahin, & Dede, 2019).…”

“…With the same laser parameters, the μTBS we recorded for LU was 13.42 MPa and for VE was 1.53 MPa after 10,000 thermal cycling. In another study, it was reported that NY laser treated resin-ceramic materials (Lava Ultimate, Vita Enamic and GC Cerasmart) showed significantly higher μTBS than control groups (Celik, Sahin, & Dede, 2019). Shiu et al (2007) reported that the EY laser-treated feldspar ceramic showed low (3.67 MPa) bond strength without any thermalcycle and any other aging procedure.…”

Evaluation of bond strength of resin nano-ceramic as post material

“…Fredriksson et al investigated the survival of restored teeth with fiber posts in 236 patients, and reported that only 5 teeth failed at the end of 3 years [2]. Nowadays, hybrid ceramics have been introduced and provide better physical, mechanical, and enhanced flexural properties of ceramics and composites [3]. However, the major disadvantage of these post systems is the uncertainty about the adhesion to root canal dentin.…”