The Effect of Preheating of Orthodontic Resin on The Shear Bond Strength of Convensional Orthodontic Bracket to Enamel Surface

Taib, Omar Jasim Mohamed; Chawshli, Omar Fawzi

doi:10.25130/tjds.11.1.15

	The Effect of Preheating of Orthodontic Resin on The Shear Bond Strength of Convensional Orthodontic Bracket to Enamel Surface
Tikrit Journal for Dental Sciences
Volume 11, Issue 1, June 2023, Pages 131-139 PDF (544.7 K)
DOI: 10.25130/tjds.11.1.15
Authors
Omar Jasim Mohamed Taib^* ; Omar Fawzi Chawshli
Dpartment .P o P college of dentistry Hawler Medical University . Iraq
Abstract
Adequate bond strength between enamel and orthodontic bracket is crucial, several factors affect the bond strength including the adhesive temperature prior to bonding. The objective of the study was to investigate if there is any relationship between adhesive temperature prior to bonding and the Shear Bond Strength (SBS) of orthodontic bracket to the enamel surface. Method: In this in-vitro study, A total of 64 freshly extracted premolar teeth were used which were divided into four groups each one had different adhesive temperature prior to bonding (room temperature ,30°C, 50°C, and 70°C), and each group went through SBS test under Universal Instron machine and ARI score test using Stereomicroscope. Results: All pre-heated groups had a higher mean value than the room temperature group, while the mean value of SBS were highest in 70°C group but at 50°C there was a drop down in the SBS values which had a mean less than 30°C and 70°C groups. ARI scores showed not statistically significant different between the groups. Conclusion: Pre-heating orthodontic adhesive right before bonding to 70°C can significantly increase bracket SBS to enamel. While, preheating to 30°C could have a greater SBS than pre-heating to 50°C.
Keywords
Orthodontic Adhesive Shear Bond Strength Ad

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