摘要:
Orthodontic adhesive is cooled below ambient temperature in order to facilitate applying the adhesive to the base of an orthodontic appliance. The adhesive is placed on a carrier and formed into a certain shape on the carrier, and then released from the carrier while cool. In one embodiment, a quantity of adhesive is placed on the base of the appliance, and the appliance is then moved to a cut-off die while the adhesive remains cool and relatively brittle; next, a stream of pressurized air fractures and removes excess adhesive from the appliance base.
摘要:
An article includs a) a tray having at least two holes; b) at least two substrates each having a top surface and a single well opening only at the top surface and being removably retained in one of the holes in the tray; c) a lid releasably attached to the top surface so as to cover the well opening in a manner such that the substrate is removable from the hole with the lid attached to the top surface thereof; d) an orthodontic appliance having a tacky substance on an exterior surface thereof that is positioned in the well such that the tacky substance does not separate from the appliance upon removal from the well.
摘要:
Provided are abrasive assemblies and related methods that combine a head portion including an integral abrasive member and a drive portion including a resilient cylindrical mandrel. The abrasive member has a receptacle that is complemental to a working end of the mandrel when both members are relaxed. As the abrasive member engages to, or disengages from, the mandrel, the receptacle resiliently expands and the working end of the mandrel resiliently compresses, each in cooperation with the other. Optionally, the abrasive member is maintained in compression in both directions parallel and perpendicular to the longitudinal axis of the mandrel. Advantageously, these assemblies provide for superior retention and slip resistance, ease-of-use, and high manufacturing tolerances.
摘要:
Dental compositions and biphenyl di(meth)acrylate monomers are described. The dental compositions comprise at least one biphenyl di(meth)acrylate monomer comprising two aromatic rings connected with a C—C bond wherein the rings each comprise a substituent comprising a urethane moiety and a (meth)acrylate end group.
摘要:
Photocurable, addition polymerizable compositions contain an epoxy resin and a photoinitiator system containing (a) an epoxy resin and (b) a photoinitiator system comprising: (i) an iodonium salt; (ii) a visible light sensitizer; and (iii) an electron donor compound, wherein the photoinitiator system has a photoinduced potential of at least about 0 mV relative to a standard solution of 2.9.times.10.sup.-5 moles/g diphenyl iodonium hexafluoroantimonate and 1.5.times.10.sup.-5 moles/g camphorquinone in 2-butanone. The compositions cure on exposure to light in the visible spectrum and are useful in a variety of applications, including dental adhesives and composites.
摘要:
Photocurable, addition polymerizable compositions contain an epoxy resin and a photoinitiator system containing (a) an epoxy resin, (b) a hydroxyl containing material and (c) a photoinitiator system comprising: (i) an iodonium salt; (ii) a visible light sensitizer; and (iii) an electron donor compound, wherein the photoinitiator system has a photoinduced potential of at least about 100 mV relative to a standard solution of 2.9.times.10.sup.-5 moles/g diphenyl iodonium hexafluoroantimonate and 1.5.times.10.sup.-5 moles/g camphorquinone in 2-butanone. The compositions cure on exposure to light in the visible spectrum and are useful in a variety of applications, including dental adhesives and composites.
摘要:
Disclosed is a packaged element containing a) a substrate that transmits less than about 0.5% of actinic radiation and has at least one recess, b) a cover that transmits less than about 0.5% of actinic radiation and transmits at least part of the visible light spectrum, c) a structure for maintaining the cover in contact with the substrate such that the cover filters incident radiation entering the recess, and d) an element located in the recess and having a substance thereon that is curable by exposure to the actinic radiation. Also disclosed is an article containing a) a substrate having at least one recess with an interior surface, b) an element having a tacky substance on a surface thereof, and c) a structure for positioning the element inside the recess such that the tacky substance does not separate from the element upon removal from the recess.
摘要:
Dental compositions and biphenyl di(meth)acrylate monomers are described. The dental compositions comprise at least one biphenyl di(meth)acrylate monomer comprising two aromatic rings connected with a C—C bond wherein the rings each comprise a substituent comprising a urethane moiety and a (meth)acrylate end group.
摘要:
Dental compositions and methods of treating an oral surface are described. The dental compositions comprise at least one biphenyl di(meth)acrylate monomer.