Influence of the Multiple Layers Application and the Heating of Silane on the Bond Strength between Lithium Disilicate Ceramics and Resinous Cement

Abstract

Objective The study aimed to evaluate the bond strength between lithium disilicate ceramic and resinous cement when silane (Prosil, FGM) was applied in different amounts of layers under heating or not. Materials and Methods Sixty IPS E-max CAD ceramic (Ivoclar) was used. They were conditioned with 10% hydrofluoric acid for 20 seconds. The samples were distributed in six groups (n = 10): 1Sil, 1 layer of silane without heating; 1SilAq, 1 layer of silane with heating; 2Sil, 2 layers without heating; 2SilAq, 2 layers with heating; 3Sil, 3 layers without heating; and 3SilAq, 3 layers with heating. After each layer, a jet of cold air was applied for 20 seconds in groups 1Sil, 2Sil, 3Sil, and jet of hot air (50°C) in groups 1SilAq, 2SilAq, and 3SilAq. Subsequently, an adhesive layer was applied, and fourcylinders were made on the ceramic with a resin cement AllCemVeneer and photoactivated for 20 seconds. The samples were stored at 37°C for 24 hours and analyzed to the microshear test at EMIC. Statistical Analysis Data were submitted to ANOVA and Tukey’s test (α = 0.05). Results The results showed that there was no statistical interaction between the factors studied. The “heating” factor was not statistically significant; however, the “silane layers” factor showed differences between groups. The analysis of the results showed that the use of one (66%) or two layers (67%) of silane regardless of heating, produced higher values of bond strength, when compared with the group of three layers (62%). Conclusion The use of silane with one or two layers provided a greater bond strength between lithium disilicate ceramic and resinous cement and that the heating did not influence the results.

Chemical Surface Modification Methods of Resin Composite Repaired with Resin-Modified Glass-Ionomer Cement

“…20 The adhesive resin could infiltrate within the surface roughness and reinforce To use a silane agent enhances the wettability of the repaired surface by encouraging chemical bonding between the silica or glass fillers and the resin matrix material, according to several studies. 12,13,[22][23][24][25] Staxrud and Dahl 26 reported that the repair of resin composites with a universal adhesive proved as successful as a pure silane prior to the use of an adhesive agent. Moreover, Fornazari et al 27 found that the application of a universal bond containing silane eliminates the requirement for a separate use of silane coupling agent in the clinical procedure for aged resin composite repair.…”

Two‑year clinical performance of indirect restorations fabricated from CAD/CAM nano hybrid composite versus lithium disilicate in mutilated vital teeth. A randomized controlled trial

“…The Cleaned restoration was then placed in an ultrasonic cleaner filled with distilled water for 4 min [ 26 ]. Then it was silanated (Calibra silane) and heated using a furnace for 1 min [ 28 ], and universal adhesive was applied (One coat7) according to the manufacturer’s instructions as previously described.…”

The influence of a composite resin adhesive on microleakage into the implant screw access chamber

“…Silane (Relyx Ceramic Primer, 3M, St Paul, MN, USA) was applied to the internal surfaces of the lithium disilicate crowns for sixty seconds, then air dried. The second silane layer maximised the surface coverage and siloxane linkages without affecting bond strength 25 …”

“…The second silane layer maximised the surface coverage and siloxane linkages without affecting bond strength. 25 Crowns were luted to Ti-base abutments with an autocure resin cement (Multilink Hybrid Abutment Cement; Ivoclar Vivadent). During setting, the Ti-base abutments were affixed to the laboratory analogs and the screw access chamber and screw head protected with PTFE (polytetrafluoroethylene) tape (Isotape; TDV, Santa Catarina, Brazil) which was subsequently removed.…”