Shear bond strength of ceramic brackets to resin-composite surfaces.
In this study, two types of ceramic brackets--monocrystalline and polycrystalline--were bonded to unroughened and roughened resin-composite discs using a light-cured orthodontic adhesive, and the bonds tested under shear stress in a universal testing machine. There was no significant difference in the shear bond strength between the combinations of ceramic brackets, and between the surface treatments of the resin composite. A higher frequency of resin-composite fracture was observed with the polycrystalline brackets (12/20) than with the monocrystalline ceramic brackets (7/20). It is concluded that debonding any type of ceramic bracket from a resin-composite surface may cause damage to the resin composite itself.
Chunhacheevachaloke
E
E
Faculty of Dentistry, Srinakharinwirot University, Thailand.
Tyas
M J
MJ
D000704:Analysis of Variance; D002516:Ceramics / Q000737:chemistry*; D016009:Chi-Square Distribution; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding / Q000379:methods / Q000706:statistics & numerical data; D006801:Humans; D008422:Materials Testing / Q000379:methods / Q000706:statistics & numerical data; D016910:Orthodontic Brackets / Q000706:statistics & numerical data; D013499:Surface Properties; D013718:Tensile Strength
D003188:Composite Resins