Role Of Different Collagen Cross-Linking Agents Like Proanthocyanidin, Riboflavin And White Tea On The Shear Bond Strength To Dentin- An In-Vitro Study.

Abstract

OBJECTIVES: Dentin surface pre-treatment with collagen stabilizing agents prior to bonding procedures increases the bond strength.The current study evaluated the effect of dentin surface pre-treatment with collagen cross-linking agents on the shear bond strength to dentin.

MATERIALS & METHODS: Forty premolars were decoronated 2 mm above cemento-enamel junction and restored with composite.  Samples were randomly divided into four groups with n=10 in each group - Group I: (Control)no prior dentin surface treatment and Group II, Group III, Group IV: Dentin pre-treated with 3.75% Proanthocyanidin (PA), 1 % Riboflavin,10 % White tea respectively.  Thermocycling was done to simulate the clinical scenario which was followed by shear bond strength evaluation on Universal Testing Machine. The load to failure was recorded individually.  The mean shear bond strength was statistically analysed with One-wayANOVA and Students ‘t’ test was used to obtain multiple comparison between the groups.

RESULTS: The highest mean shear bond strength value 42.91 MPa was recorded in Group III (Riboflavin) when compared to Group II(PA) -33.43 MPa, Group I (control) -28.03 MPa and Group IV (white tea)- 19.93 MPa.

CONCLUSIONS: Dentin surface pre-treatmentby the application of Riboflavin and PA enhanced collagen stabilization and increased the shear bond strength to dentin when compared to the control and white tea.