The Effect of Saliva Contamination on Shear Bond Strength of Two Universal Bonding Agents-An in vitro Study ZC06-ZC10
Dr. Anuja Sanjay Kulkarni,
401- Om Apts, 116-118, Dr. MB Raut Road, Shivaji Park, Mumbai-400028, Maharashtra, India.
Introduction: Universal bonding agents are prevalent in dentistry today. The effects of both salivary contamination and subsequent decontamination protocols on these adhesives have not been studied extensively.
Aim: To evaluate the effect of saliva contamination and decontamination on bond strength of two universal adhesive systems.
Materials and Methods: This in vitro study was conducted in the Department of Conservative Dentistry and Endodontics, YMT Dental College and Hospital, Navi Mumbai, Maharashtra, India. Ninety permanent teeth mounted in acrylic were randomly divided into two groups based on the adhesives used; Group I- Single Bond Universal (SBU) (3M ESPE) and Group II-Tetric ®N-Bond Universal (Ivoclar Vivadent). They were further divided into three subgroups (n=15): subgroup-1) Control; subgroup-2) Contamination; subgroup-3) Decontamination (Water rinse and reapplication). After composite application, the samples were subjected to Shear Bond Strength (SBS) testing with universal testing machine. Modes of failure were examined using a stereomicroscope. Statistical analysis was carried out using one-way ANOVA test and Tukeys HSD test (p<0.05).
Results: Highest mean SBS was observed in subgroup-1 whereas lowest mean SBS was seen in subgroup-2. There was statistical increase in mean SBS values in subgroup-3. The mean SBS values of Group II were statistically higher than those in Group I (p<0.05). The mode of failure was mainly adhesive.
Conclusion: The SBS of universal adhesives to dentin is decreased by salivary contamination. Water rinsing and reapplication of the bonding agent improves the bond strength significantly.