Two-part self-adhering dental compositions

Details Two-part self-adhering dental compositions Two-part self-adhering dental compositions

2007-01-23

2007-01-23

Szekely, Peter (Department: 1714)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S116000, C524S117000, C524S118000

Reexamination Certificate

active

10440804

ABSTRACT:
A shelf-stable two-part self-adhering dental composition and method. The composition comprises(a) at least one acidic compound containing at least one acidic moiety selected from the group consisting ofwhere R is an alkyl or aryl group;(b) at least one polymerizable monomer without any acidic group where the polymerizable group is selected from the group consisting of an acrylate, a methacrylate and a vinyl group;(c) a substituted thiourea selected from the group consisting of 1-(2-pyridyl)-2-thiourea and 1-(2-tetrahydrofurfuryl)-2-thiourea; and(d) a hydroperoxide compound with at least one hydroperoxide group attached to a tertiary carbon. The first and second parts are then mixed immediately prior to application, applied to a dental substrate, and hardened. The bond strength of the mixed composition to dentine substrate is at least 3 MPa. The composition has excellent shelf-life and is self-adhering to various dental substrates such as a tooth, metal alloy and porcelain. It can be used as a filling material, a cement, a liner/base, a pit/fissure sealant, a primer or an adhesive.

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