Comparative Evaluation of The Shear Bond Strength  and Debonding Properties of a Conventional Composite  and Flowable Composites Used for Orthodontic Bracket  Bonding–An invitro study

Dr. Pradeep. S; Dr. Shivalinga. B. M.; Dr. Ravi. S.

Volume : II, Issue : II, February - 2013

Comparative Evaluation of The Shear Bond Strength and Debonding Properties of a Conventional Composite and Flowable Composites Used for Orthodontic Bracket Bonding–An invitro study

Dr. Pradeep. S , Dr. Shivalinga. B. M. , Dr. Ravi. S.

Abstract :

AIM: To evaluate and compare sshear bond strength and debonding characters of the Transbond XT(BisGMA based composite), Esthet-X Flow(flowable composite) , Filtek Z-350(flowable composite) MATERIALS AND METHOD: A total of ninety human premolars were divided into group I,Transbond XT(n=30);group II, Esthet-X Flow(n=30) and group III, Filtek Z-350(n=30), the pre adjusted edgewise stainless steel premolar ackets were bonded to evaluate the shear bond and debonding properties. RESULT: The results of the statistical analysis comp� the three groups indicated no statistically significant differences between the groups. In general, the shear bond strength with group I and III exhibited similar bond strength with 11.58+/-1.3MPa and 11.07+/-1.0MPa respectively. Groups III exhibited least bond strength of 10.7+/-2MPa. In modified ARI the majority of bond failures occurred at enamel-adhesive interface or cohesive type failure in all the 3-groups. Group II and III showed increased frequency of score 2, 4 and 5 compared to Group I which showed increased frequency of score 0 and 1. CONCLUSION: when considering the SBS and ARI scores obtained, flowable composites can be effectively applied to orthodontic acket bonding.