The present invention is related to a dental composition comprising: (a) at least one polymerizable monomer having at least one ethylenically unsaturated group; (b) a radical initiator system comprising (i) a photosensitizer having an absorption maximum ranging from 400 nm to 800 nm; (ii) a coinitiator; and (iii) a compound of the following formula (1):

##STR00001## wherein R.sup.1 and R.sup.2, which may be the same or different, independently represent a hydrogen atom, a C.sub.1-6 alkyl group, or a C.sub.1-6 alkoxy group; R.sup.3 and R.sup.4, which may be the same or different, independently represent a hydrogen atom, or a C.sub.1-6 alkyl group, or R.sup.3 and R.sup.4 may represent a bond so that the carbon atoms to which R.sup.3 and R.sup.4 are bonded are linked by a double bond; R.sup.5 and R.sup.6, which may be the same or different, independently represent a hydrogen atom, or a C.sub.1-6 alkyl group, or R.sup.5 and R.sup.6 may represent a bond so that the carbon atoms to which R.sup.5 and R.sup.6 are bonded are linked by a double bond; L represents a single bond or a group —CRH—, wherein R may be a hydrogen atom, a C.sub.1-6 alkyl group, or a C.sub.1-6 alkoxy group; n and m, independently are integers of 1 to 6.

The present invention is related to a dental composition comprising: (a) at least one polymerizable monomer having at least one ethylenically unsaturated group; (b) a radical initiator system comprising (i) a photosensitizer having an absorption maximum ranging from 400 nm to 800 nm; (ii) a coinitiator; and (iii) a compound of the following formula (1):

##STR00001## wherein R.sup.1 and R.sup.2, which may be the same or different, independently represent a hydrogen atom, a C.sub.1-6 alkyl group, or a C.sub.1-6 alkoxy group; R.sup.3 and R.sup.4, which may be the same or different, independently represent a hydrogen atom, or a C.sub.1-6 alkyl group, or R.sup.3 and R.sup.4 may represent a bond so that the carbon atoms to which R.sup.3 and R.sup.4 are bonded are linked by a double bond; R.sup.5 and R.sup.6, which may be the same or different, independently represent a hydrogen atom, or a C.sub.1-6 alkyl group, or R.sup.5 and R.sup.6 may represent a bond so that the carbon atoms to which R.sup.5 and R.sup.6 are bonded are linked by a double bond; L represents a single bond or a group —CRH—, wherein R may be a hydrogen atom, a C.sub.1-6 alkyl group, or a C.sub.1-6 alkoxy group; n and m, independently are integers of 1 to 6.

Dental assemblies and related methods of making are provided. The dental assemblies include a dental article with a bonding surface an adhesive having both a compressible material and at least one hardenable dental composition extending across the bonding surface. The compressible material is coupled to the dental article by a first quantity of hardened dental composition extending at least partially through the compressible material and contacting the bonding surface. The hardened dental composition extends over less than the entire bonding surface. Adjacent portions of the compressible material contain a second quantity of unhardened dental composition, preserving flexibility of the compressible material. Advantageously, this configuration was found to enhance bond reliability and facilitate manufacturing.

Dental assemblies and related methods of making are provided. The dental assemblies include a dental article with a bonding surface an adhesive having both a compressible material and at least one hardenable dental composition extending across the bonding surface. The compressible material is coupled to the dental article by a first quantity of hardened dental composition extending at least partially through the compressible material and contacting the bonding surface. The hardened dental composition extends over less than the entire bonding surface. Adjacent portions of the compressible material contain a second quantity of unhardened dental composition, preserving flexibility of the compressible material. Advantageously, this configuration was found to enhance bond reliability and facilitate manufacturing.

Dental assemblies and related methods of making are provided. The dental assemblies include a dental article with a bonding surface an adhesive having both a compressible material and at least one hardenable dental composition extending across the bonding surface. The compressible material is coupled to the dental article by a first quantity of hardened dental composition extending at least partially through the compressible material and contacting the bonding surface. The hardened dental composition extends over less than the entire bonding surface. Adjacent portions of the compressible material contain a second quantity of unhardened dental composition, preserving flexibility of the compressible material. Advantageously, this configuration was found to enhance bond reliability and facilitate manufacturing.

The present disclosure relates to ornamental indicia carrier and method of producing the same. In some embodiments, the ornamental indicia carrier comprises an ultraviolet light (“UV”) cured ink printed on a thin flexible film and combined with an adhesive layer. The ornamental indicia carrier is capable of enduring the conditions inside the mouth for an extended period of time and can be used in conjunction with a dental appliance.

A curable composition comprises at least one monomer comprising at least one (meth)acryl group and a photoinitiator system. The photoinitiator system comprises at least one Type II photoinitiator and at least one cyclic β-diketone represented by the formula (I) or a tautomer thereof. R.sup.1 represents an organic moiety having at least one free-radically polymerizable group. Each R.sup.2 independently represents H or an aliphatic group having from 1 to 12 carbon atoms, and up to two of oxygen and sulfur atoms, n represents 1, 2, or 3.

A curable composition comprises at least one monomer comprising at least one (meth)acryl group and a photoinitiator system. The photoinitiator system comprises at least one Type II photoinitiator and at least one cyclic β-diketone represented by the formula (I) or a tautomer thereof. R.sup.1 represents an organic moiety having at least one free-radically polymerizable group. Each R.sup.2 independently represents H or an aliphatic group having from 1 to 12 carbon atoms, and up to two of oxygen and sulfur atoms, n represents 1, 2, or 3.

The present disclosure relates to ornamental indicia carrier and method of producing the same. In some embodiments, the ornamental indicia carrier comprises an ultraviolet light (“UV”) cured ink printed on a thin flexible film and combined with an adhesive layer. The ornamental indicia carrier is capable of enduring the conditions inside the mouth for an extended period of time and can be used in conjunction with a dental appliance.

In one embodiment, the present application discloses a photo-cleavable surface binding compound of the Formula I and Formula II:

##STR00001##

wherein the variables EG, EG1, SP1, SP2, SP3, Ar and BG are as defined herein. In another embodiment, the application discloses a method for forming a coating on a surface of a substrate using the surface binding compound.