Adhesion to lithium disilicate glass-ceramics after aging: Resin viscosity and ceramic surface treatment effects

被引:6
作者
Dapieve, Kiara Serafini [1 ]
Pilecco, Rafaela Oliveira [1 ]
Temp, Renatta Wrasse [1 ]
Villetti, Marcos Antonio [2 ]
Pereira, Gabriel Kalil Rocha [1 ]
Valandro, Luiz Felipe [1 ,3 ]
机构
[1] Fed Univ Santa Maria UFSM, Fac Dent, Postgrad Program Oral Sci, Prosthodont Unit, Santa Maria, RS, Brazil
[2] Fed Univ Santa Maria UFSM, Dept Phys, Postgrad Program Chem, Santa Maria, RS, Brazil
[3] Univ Fed Santa Maria, Biomat Unit Ctr Dev Adv Mat, Postgrad Program Oral Sci Prosthodont, Fac Odontol, 1000 Roraima Ave,T St,Bldg 26H,Room 307 UFSM Campu, BR-97105900 Santa Maria, RS, Brazil
关键词
Ceramics; Micro; -shear; Rheology; Resin composite cements; RHEOLOGICAL PROPERTIES; COMPOSITES;
D O I
10.1016/j.jmbbm.2023.105819
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
Objective: To evaluate the influence of intaglio ceramic surface treatments, resin cement viscosities, and storage regimens on the microshear bond strength of lithium disilicate ceramic. In addition, to investigate the dynamic viscosity of the resin-based luting agents. Materials and methods: Ceramic slices were randomly allocated into eight groups (n = 19) considering three factors: ceramic surface treatment (hydrofluoric acid followed by silane, HF; or self-etching ceramic primer, E&P), resin cement viscosity (high, HIGH; or low, LOW) and storage regimen (baseline or aging). Surface treatments were performed, resin cement cylinders were built and microshear bond strength tests (mu SBS, wire -loop method, speed: 1.0 mm/min) were run according to the storage factor. Failure mode, topographic and dynamic viscosity (37 degrees C; shear rate of 1.0-100 s-1) of resin cement components (base, high and low catalyst) were also performed.Results: Resin cement viscosity and the association among ceramic surface treatment, resin cement viscosity, and storage regimen were statistically significant factors (p < 0.05). Worse behavior was identified for the E&P_HIGH group compared to the E&P_LOW and HF_LOW in the baseline condition. After aging, the HF_HIGH group (16.78 MPa) presented the worst result among the aged groups (21.44-25.25 MPa). Most of the failures were adhesive. Surface micrographs revealed a distinct pattern after etching, more aggressive by HF and milder by E&P. High viscosity catalyst is 5.3 and 8.5-fold more viscous than the base and low viscosity catalyst, respectively (high > base > low).Conclusion: Differences in filler content can impact the resin viscosity of the material (more fillers increase the viscosity), which in turn can influence the bond strength of a lithium disilicate ceramic, depending on the surface treatment and storage regimen.
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页数:7
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