Abstract
Objective: To determine microtensile and microshear bond strength of light curing cement on ceramic using conventional technique of hydrofluoric acid etching followed by silane application in comparison to self-etching ceramic primer. Materials and Methods: Sixty lithium disilicate ceramic discs of IPS e.max and sixty discs of feldspar were mounted at the center of cylindrical mold using acrylic resin. The 120 polished specimens were divided into four groups (n = 3 each). Group 1 (IPS e.max) and Group 2 (feldspar) were etched using 9.5% hydrofluoric acid for 60 seconds and Monobond Plus was applied on the pretreated surface for 60 seconds. No pretreatment was done for Group 3 (IPS e. max) and Group 4 (feldspar). After discs were thoroughly cleaned and dried, Monobond Etch and Prime was applied to the surface agitated for 20 seconds and left undisturbed for 40 seconds. After removing the putty molds, all samples were kept in the oven at 37 degrees C for 24 hours. Each group was subdivided into 2 subgroups (n = 15 each) and first subgroups were subjected to microtensile test while second subgroups to microshear test. Results: Monobond Plus with HF acid of lithium disilicate ceramic demonstrated the highest shear bond strength values. Statistically significant difference was found between the two different surface treatments (Monobond Plus with hydrofluoric acid and Monobond Etch and Prime) (P = 0.002). Conclusions: The hydrofluoric acid followed by silanization surface treatment attained higher microshear bond strength values with lithium disilicate ceramics. Using the single-bottle self-etching primer reduces technique sensitivity and less time consuming.