| 摘要 |
<p>Endodontic sealant compositions and methods for sealing a root canal (12) using sealant (30) or other filling materials. The compositions include one or more resins that promote adhesion to hydrophilic dental tissues. Examples include alkyl methacrylates and derivatives thereof, such as alkylamino methacrylates and oxyphosphoro methacrylates. The compositions include a radio opacifying agent, so that they may be seen using X-rays, and one or more polymerization initiators to effect curing, typically both chemical and photo initiators to yield a dual cure sealant composition. The compositions are introduced into the root canal (12) using a narrow cannula (26-Fig.2) coupled to a high pressure hydraulic delivery (24-Fig.2). Additional pressure may be applied to the sealant compositions (30) using a syringe-like plunger (36, 42) introduced within a cylindrical access hole (34) drilled through the crown of the tooth (10). A curing lamp may be used to cure the top layer of the sealant composition to provide a rigid bonding surface to which a composite resin can chemically bond or adhere.</p> |
