Effect of saliva contamination on the shear bond strength of a new self-etch adhesive system to dentin

• Published in: Journal of conservative dentistry 2014-01, Vol.17 (1), p.31-34
• Main Authors: Munaga, Swapna, Chitumalla, Rajkiran, Kubigiri, Satheesh Kr, Rawtiya, Manjusha, Khan, Sheeba, Sajjan, Parappa
• Format: Article
• Language: English
• Subjects: Adhesives; Body fluids; Bond strength; Contamination; Dental adhesives; Dental glass ionomer cements; Dentin; Dentistry; Original; Saliva; Salivary glands; secretions
• ISSN: 0972-0707; 0974-5203
• DOI: 10.4103/0972-0707.124124

To evaluate the effect of saliva contamination on the shear bond strength of a new two-step self-etch adhesive (P90 system adhesive) to dentin and to determine the effect of contaminant removing treatments on the recovery of bond strengths. The buccal surfaces of 40 human premolars were ground to expose dentin. The specimens were randomly divided into four groups. Group 1 is uncontaminated and serves as the control group. Further groups were divided based on the step in the bonding sequence when the contamination had occurred as follows: Group 2 (primer, saliva contamination, rinse and dry), group 3 (after procedure of group 2, reapplication of primer), and group 4 (after procedure like in control group, saliva contamination, rinse and dry). Filtek P90 composite resin cylinders of 3 mm diameter and 3 mm length were fabricated on the surfaces. Shear bond strength testing was done in an Instron Universal Testing Machine and the data were subjected to one-way analysis of variance (ANOVA) and Student's t-test. With P90 system adhesive, group 2 and group 4 showed lower shear bond strength than group 1 (control) and group 3 (P < 0.05). Saliva contamination significantly decreased the shear bond strength of the adhesive to dentin.