Volume 6 Issue 2 (March - April), 2020

Original Articles

Assessment of shear bond strength of two different bonding materials bonded with primer and without primer - A comparative study
Neha Chandel, Prabhat Mandhotra, Tarush Thakur, Aprajita Dogra, Arun Patiyal, Anuj K Sharma

Background: The procedure of acid etching and bonding had come to stay in orthodontics; this had indeed been endorsed by clinicians worldwide. Bonding is a technique sensitive procedure and moisture is cited as most common cause of bond failure. Hence; the present study was undertaken for assessing the shear bond strength of two different bonding materials bonded with primer and without primer. Materials & methods: a total of 100 tooth specimens were obtained. All the specimens were randomly and broadly divided into following study groups: Group A: Transbond XT with Primer, Group B: Transbond XT without Primer, Group C: Orthofix with Primer, and Group D: Orthofix without Primer. Cleaning of all the tooth specimens was done using pumice. Stainless steel 3M brackets were used in the present study. Etching of the tooth specimens was done for 60 seconds followed by rinsing and air drying. This was followed by bonding of brackets to the teeth with the respective adhesive and curing for 40 seconds with primer and without primer according to the group division. Debonding was done after 24 hours. Shear bond strength was assessed on digital analyst device. Results: Mean Shear bond strength of specimens of Group A, Group B, Group and Group D was found to be 12.12 7.96, 10.86 and 6.12 respectively. In the present study, while comparing the mean shear bond strength between group A and group B, between group A and group D, between Group B and Group C and between group C and group D, significant results were obtained. Conclusion: Shear bond strength of adhesives with primer was significantly higher in comparison to adhesives without primer indicating that sealant creates a mechanical bonding between the enamel and adhesive interface. Key words: Shear bond strength, Orthodontic, Primer

 
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