Comparison of Tie Wing Fracture Resistance of Differing Ceramic Brackets

Abstract

Objective:The aim of this study was to compare the tie wing fracture resistance of 4 different manufacturers’ ceramic brackets currently on the market.Methods:The tie wings of ceramic brackets from 4 manufacturers were tested with 10 samples in each group. The brackets were Ormco Symetri, 3M Clarity, American Radiance Plus, and Dentsply Ovation S. The brackets were mounted and fixed in a universal testing machine. A stainless steel ligature wire was looped around a tie wing and the mean tensile strength was both tested and recorded.Results:There was a significant overall difference in tensile strength among the 4 groups (P < .0001) with the 3M Clarity brackets having the highest MPa. When the groups were compared to each other, they also showed a significant difference in mean tensile strength with the exception being the American Radiance Plus and Ormco Symetri brackets.Conclusion:Test results concluded that the 3M Clarity brackets had the highest resistance to tie wing fracture, while the Dentsply Ovation S brackets had the lowest resistance.

Keywords

• fracture resistance
• ceramic orthodontic brackets
• tie wing fracture
• monocrystalline
• polycrystalline