Effect of silica coating on bond strength between a gold alloy and metal bracket bonded with chemically cured resin
류민주, 강성남, 임성훈,
소속 상세정보
류민주 ( Ryu Min-Ju ) - Chosun University School of Dentistry Department of Orthodontics
강성남 ( Gang Sung-Nam ) - Chosun University School of Dentistry Department of Orthodontics
임성훈 ( Lim Sung-Hoon ) - Chosun University School of Dentistry Department of Orthodontics
KMID : 0361920140440030105
Abstract
Objective: The purpose of this study was to evaluate the effects of three different surface conditioning methods on the shear bond strength (SBS) of metal brackets bonded directly to gold alloy with chemically cured resin.
Methods: Two hundred ten type III gold alloy specimens were randomly divided into six groups according to the combination of three different surface conditioning methods (aluminum oxide sandblasting only, application of a metal primer after aluminum oxide sandblasting, silica coating and silanation) and thermocycling (with thermocycling, without thermocycling). After performing surface conditioning of specimens in accordance with each experimental condition, metal brackets were bonded to all specimens using a chemically cured resin. The SBS was measured at the moment of bracket debonding, and the resin remnants on the specimen surface were evaluated using the adhesive remnant index.
Results: Application of metal primer after aluminum oxide sandblasting yielded a higher bond strength than that with aluminum oxide sandblasting alone (p < 0.001), and silica coating and silanation yielded a higher bond strength than that with metal primer after aluminum oxide sandblasting (p < 0.001). There was no significant change in SBS after thermocycling in all groups.
Conclusions: With silica coating and silanation, clinically satisfactory bond strength can be attained when metal brackets are directly bonded to gold alloys using a chemically cured resin.
키워드
Bonding; Biomaterial science; Silicoating; Chemically cured resin
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