Assessment of shear bond strength of orthodontic brackets bonded by trans-illumination method

Objective: To assess the clinical effectiveness of trans-illumination technique in bonding orthodontic brackets. Materials and method: Forty premolars were arbitrarily divided into 4 groups. Bonding of brackets was done with 40- and 80-s light curing from the buccal or lingual aspect with different intensities. Shear bond strengths of brackets were measured using a universal testing machine. Collected data were analyzed statistically. Result: The highest shear bond was observed in group 2 (high intensity, 40 s, buccal) and the lowest found in group 3 (low intensity, 40 s, lingual). Conclusion: In all experimental groups except group 2, shear bond strength was below the clinically accepted values. Doubling the curing time and increasing the light intensity during trans-illumination are recommended for achieving acceptable bond strengths

Adhesive · Bond strength · Buccal administration · Composite material · Light intensity · Optics · Physics · Shear (geology · Ultimate tensile strength · Universal testing machine · Dental materials and restorations · Dental Research and COVID-19 · Dentistry · Materials Science · Medicine · Orthodontics and Dentofacial Orthopedics · Orthodontics