The Shear Bond Strengths of Metal and Ceramic Brackets: An in-Vitro Comparative Study

Abstract

Aim: This study has compared the Shear Bond Strengths (SBSs) of ceramic brackets and metal brackets. Materials and Method:Forty freshly extracted, human maxillary first premolars were selected for bonding. They were equally bonded with ceramic brackets (Transcend series 6000) and metal brackets (Mini Dynalock Straight wire brackets). A no -mix orthodontic adhesive system was used. Their shear bond strengths were measured by using the Instron universal machine. Results:The mean bond strength of the ceramic brackets was 20.68 ± 3.89 Mpa and that of the metal brackets was 12.15 ± 1.32 MPa. Conclusion:The shear bond strength of the ceramic brackets was found to be superior than that of the metal brackets.

Comparison of shear bond strength and bonding time of a novel flash-free bonding system

“…The SBS of the ceramic brackets in each group was less than the bond strength reported by Reddy et al 9 and Uysal et al 10 but comparable to the bond strength demonstrated by Bishara et al 11 and Zielinski et al 12 Although the SBS of the APC Flash-Free group was significantly greater than that of the other two groups, all three methods of bonding displayed bond strengths greater than 10 MPa, which is sufficient for orthodontic purposes. The overall bond strength, however, may be reduced with thermocycling or with increased time between bonding and the shear test.…”

Effects of silane application on the shear bond strength of ceramic orthodontic brackets to enamel surface

“…15 Ceramic bracket, nevertheless, has some weaknesses. For instance, ceramic bracket cannot chemically bind to acrylic adhesive materials due to aluminum oxide contained.…”

“…2 Silanes are chemical elements that will make a bond between two materials, inorganic and organic ones. 15 One part of silane molecules on the base of ceramic brackets will bind to an inorganic cluster, aluminum oxide, while the other part of the molecules will bind to an organic group, namely acrylic resin contained in the adhesive materials.…”

Adhesive performance of precoated brackets after expiration

“…13 In vitro bond strengths for ceramic and metal brackets often vary between studies due to differences in bracket designs and testing conditions. [14][15][16] It is equally important, however, that brackets can be safely and easily removed. Currently available adhesive precoated brackets meet these requirements.…”