| 主权项 |
1. A single component light-curable orthodontic adhesive comprising:
a curable resin monomer component; a quaternary curing initiator system comprising:
camphorquinone,bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide, octyldimethylaminobenzoate, and1,1′-azobis(cyanocyclohexane); and filler, wherein the single paste light-curable orthodontic adhesive has a working time (W) to curing time (C) ratio (W/C) of at least 10 to 30, wherein said working time is expressed as a multiple of a five second intervals that is visually determined as a point at which an approximately 2 mm×2 mm extruded sample of the single component light-curable orthodontic adhesive sufficiently hardens to a crusty consistency and undergoes a brittle fracture when cut in approximately 2 mm sections under a halogen operatory exam light positioned to provide 10,000±50 lux at the extruded sample on a white background, and wherein said curing time is a duration of exposing the single component light-curable orthodontic adhesive to a curing light that is necessary to effect a shear bond strength greater than 7 MPa within 60 seconds after the single component light-curable orthodontic adhesive is applied to an etched and sealed bovine tooth. |
