Effect of Saliva Contamination on the Bond Strength of Self-etching Adhesives to Dentin

Objectives: To determine the effects of saliva contamination on the bond strength of resin composite to moist superficial dentin using two adhesive systems, One-Up Bond F (OBF) and FL-Bond (FB). Method: Freshly extracted human teeth were sectioned bucco-lingually and embedded in potting resin. Specimens were ground to superficial dentin using 600 grit SiC discs. Adhesives were bonded to the specimens according to the manufacturers’ instructions using 5 surface conditions: Control (C), saliva/5 sec air dry/adhesive (SA), adhesive/ saliva/5 sec air dry (AS), adhesive/saliva/5 sec water rinse/5 sec air dry (ASW), and adhesive/saliva/5 sec water rinse/5 sec air dry/reapply adhesive (ASWA). Composite (TPH Spectrum) was bonded to the prepared specimens in the form of an inverted, truncated cone (bonding surface area 3 mm in diameter and height of 5 mm) for a total of 80 specimens (n=8). After bonding, specimens were stored in water at 37°C at 100% humidity for 24 hours. Specimens were debonded in tension using an Instron at a cross-head speed of 0.5 mm/min. Results: Means and standard deviations (MPa) are shown below. Fisher’s PLSD intervals for comparison of means between