Retention capacity of the bracket bases of new esthetic orthodontic brackets.
Tensile bond strength and bond failure locations were evaluated in vitro for three types of direct bonding cements (self-cured diacrylate, dual-cured diacrylate, and dual-cured glass ionomer) with four types of brackets (stainless steel, polycarbonate, ceramic, and ceramic-polycarbonate) by using a plastic cylinder as the substrate. A highly filled, self-cured diacrylate cement gave the highest bond strength values with the polycarbonate, stainless steel, and ceramic-polycarbonate brackets. A dual-cured diacrylate cement gave the highest bond strength with a mechanically retained ceramic bracket. The dual-cured glass ionomer cement gave the highest bond strength values with a silanated ceramic bracket. All bond failures occurred at the bracket/cement interface with the stainless steel bracket, whereas failure locations were at the bracket/cement interface and within the cement with the polycarbonate bracket. Bond failures occurred between bracket and cement, within the cement, and within the bracket with the ceramic brackets.
Blalock
K A
KA
Department of Oral Biomaterials, University of Texas Health Science Center, Houston Dental Branch, USA.
Powers
J M
JM
D000180:Acrylic Resins; D017438:Bisphenol A-Glycidyl Methacrylate; D002516:Ceramics; D003188:Composite Resins; D001840:Dental Bonding / Q000379:methods*; D003738:Dental Cements / Q000737:chemistry*; D005899:Glass Ionomer Cements; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D016910:Orthodontic Brackets; D011076:Polycarboxylate Cement; D019279:Resin Cements; D012117:Resins, Synthetic; D013193:Stainless Steel; D013718:Tensile Strength
D000180:Acrylic Resins; D003188:Composite Resins; D003738:Dental Cements; D005899:Glass Ionomer Cements; C081144:Photac-Fil; D011076:Polycarboxylate Cement; C090340:Reliance resin cement; D019279:Resin Cements; D012117:Resins, Synthetic; D013193:Stainless Steel; C005506:polycarbonate; D017438:Bisphenol A-Glycidyl Methacrylate