Hydrophilic endodontic sealing compositions and methods for using such compositions

A multipart endodontic filling and sealing composition comprising at least two initially separate parts which, upon mixing the parts together, form a mixed composition which is initially flowable and suitable for placement into a root canal during a root canal procedure and which hardens over time, the multipart endodontic composition consisting essentially of:

• a polymerizable resin portion contained in at least one of the initially separate parts, the polymerizable resin portion including a polymerizable adhesive resin that includes at least one of an alkyl acrylate or alkyl methacrylate and that is capable of bonding to dental tissue found within a root canal, wherein the at least one alkyl acrylate or alkyl methacrylate is substituted with at least one of an oxysulfur radical, borate radical, carboxyl radical, nitro radical, or cyano radical;
• at least one radiopaque filler contained in at least one of the initially separate parts;
• at least one chemical initiator contained in at least one of the initially separate parts which, upon mixing the parts together, causes the mixed composition to harden within a time period of about 2 minutes to about 2 hours as a result of chemical curing;
• and
• optionally, at least one polymerization photoinitiator contained in at least one of the initially separate parts which, upon irradiating at least a portion of the mixed composition with radiant energy, causes accelerated polymerization and hardening of at least a portion of the mixed composition.

A method for treating a tooth following an endodontic procedure comprising:

• providing a tooth that includes an access hole drilled into and extending through the crown of the tooth, said access hole providing access to at least one root canal of the tooth that has been cleaned by an endodontic procedure;
• mixing together initially separate parts of a multipart endodontic composition to form a mixed composition which is initially flowable and suitable for placement into a root canal during a root canal procedure and which hardens over time, the mixed composition initially including:
• a polymerizable resin portion including an adhesive resin that is at least one of an alkyl acrylate or alkyl methacrylate and capable of bonding to dental tissue found within a root canal, wherein the at least one alkyl acrylate or alkyl methacrylate is substituted with at least one of an oxysulfur radical, borate radical, carboxyl radical, nitro radical, or cyano radical;
• and
• at least one chemical initiator which causes at least a portion of the polymerizable resin portion to polymerize over a period of time;
• introducing the mixed composition into the at least one root canal of the tooth;
• allowing the mixed composition to at least partially polymerize and harden within the root canal;
• and
• filling the access hole with a filling material.