Abstract: Dental compositions are described comprising an addition-fragmentation agent of the formula: wherein R1, R2 and R3 are each independently Zm-Q-, a (hetero)alkyl group or a (hetero)aryl group with the proviso that at least one of R1, R2 and R3 is Zm-Q-; Q is a linking group have a valence of m+1; Z is an ethylenically unsaturated polymerizable group; m is 1 to 6; each X1 is independently —O— or —NR4—, where R4 is H or C1-C4 alkyl; and n is 0 or 1. Also described are dental articles prepared from a dental composition comprising an addition-fragmentation agent and methods of treating a tooth surface.

Abstract: Dental compositions are described comprising an addition-fragmentation agent of the formula: wherein R1, R2 and R3 are each independently Zm-Q-, a (hetero)alkyl group or a (hetero)aryl group with the proviso that at least one of R1, R2 and R3 is Zm-Q-; Q is a linking group have a valence of m+1; Z is an ethylenically unsaturated polymerizable group; m is 1 to 6; each X1 is independently —O— or —NR4—, where R4 is H or C1-C4 alkyl; and n is 0 or 1. Also described are dental articles prepared from a dental composition comprising an addition-fragmentation agent and methods of treating a tooth surface.

Abstract: Dental compositions are described comprising an addition-fragmentation agent comprising at least one ethylenically unsaturated terminal group and a backbone unit comprising an ?,?-unsaturated carbonyl; at least one monomer comprising at least two ethylenically unsaturated group; and inorganic oxide filler. The addition-fragmentation agent is preferably free-radically cleavable. The addition-fragmentation agent preferably comprises at least two ethylenically unsaturated terminal groups, such as (meth)acTylate groups. In some embodiments, the addition-fragmentation agent has the formula: wherein R1, R2 and R3 are each independently Zm, -Q-, a (hetero)alkyl group or a (hetero)aryl group with the proviso that at least one of R1, R2 and R3 is Zm-Q-; Q is a linking group have a valence of m+1; Z is an ethylenically unsaturated polymerizable group; m is 1 to 6; each X1 is independently —O— or —NR4—, where R4 is H or C1-C4 alkyl; and n is 0 or 1.

Abstract: Thermally responsive compositions that include a thermally responsive viscosity modifier, a polymerizable component, and water are provided. The compositions, which optionally may be hardened, are useful for application to a surface of a body.

Abstract: A method of dispensing a hardenable dental composition, which can form a temporary bond, comprising 1) providing multi-part hardenable dental composition comprising part (A) in the form of a paste comprising acid-reactive glass particles and a liquid selected from the group consisting of water, a monomer having at least one ethylenically unsaturated group per monomer molecule, and a combination thereof; and part (B) comprising a water soluble polyacid and a liquid selected from the group consisting of water, a monomer having at least one ethylenically unsaturated group per monomer molecule, and a combination thereof; wherein an adhesion reducing component is included in part (A); part (B); or parts (A) and (B); water is included in part (A); part (B); or parts (A) and (B); the monomer having at least one ethylenically unsaturated group per monomer molecule is included in part (A); part (B); or parts (A) and (B); and at least one component for initiating polymerization of the monomer is included in part (A); p

Abstract: Dental compositions are described comprising an addition-fragmentation agent comprising at least one ethylenically unsaturated terminal group and a backbone unit comprising an ?,?-unsaturated carbonyl; at least one monomer comprising at least two ethylenically unsaturated group; and inorganic oxide filler. The addition-fragmentation agent is preferably free-radically cleavable. The addition-fragmentation agent preferably comprises at least two ethylenically unsaturated terminal groups, such as (meth)acTylate groups. In some embodiments, the addition-fragmentation agent has the formula: wherein R1, R2 and R3 are each independently Zm, -Q-, a (hetero)alkyl group or a (hetero)aryl group with the proviso that at least one of R1, R2 and R3 is Zm-Q-; Q is a linking group have a valence of m+1; Z is an ethylenically unsaturated polymerizable group; m is 1 to 6; each X1 is independently —O— or —NR4—, where R4 is H or C1-C4 alkyl; and n is 0 or 1.

Abstract: The abstract has been amended as follows: A method of dispensing a hardenable dental composition, which can form a temporary bond, comprising 1) providing multi-part hardenable dental composition comprising part (A) in the form of a paste comprising acid-reactive glass particles and a liquid selected from the group consisting of water, a monomer having at least one ethylenically 10 unsaturated group per monomer molecule, and a combination thereof; and part (B) comprising a water soluble polyacid and a liquid selected from the group consisting of water, a monomer having at least one ethylenically unsaturated group per monomer molecule, and a combination thereof; and 2) extruding the composition through a static mixer in fluid communication with a first reservoir containing the part (A) and a second reservoir 20 containing the part (B); wherein a plunger is positioned in each reservoir for simultaneously forcing part (A) and part (B) into the static mixer.

Abstract: The present invention features ionomer compositions containing nanozirconia fillers. The compositions can be used in a variety of dental and orthodontic applications, for example, as adhesives, cements, restoratives, coatings and sealants.

Abstract: The present invention features ionomer compositions containing nanofillers. The compositions can be used in a variety of dental and orthodontic applications, for example, as adhesives, cements, restoratives, coatings and sealants.

Abstract: The present invention features ionomer compositions containing nanofillers. The compositions can be used in a variety of dental and orthodontic applications, for example, as adhesives, cements, restoratives, coatings and sealants.

Abstract: The present invention provides a dental paste, methods of making and using the dental paste, and compositions prepared therefrom. The dental paste includes (a) a filler including porous, non-pyrogenic silica having a silane treated surface and being substantially free of heavy metals and (b) a filler including non-agregated primary silica particles, with the fillers being dispersed in a hardenable resin. Fillers including porous, non-pyrogenic silica, and methods of making and using the fillers, are also provided.

Abstract: Thermally responsive compositions that include a thermally responsive viscosity modifier, a polymerizable component, and water are provided. The compositions, which optionally may be hardened, are useful for application to a surface of a body.

Abstract: The present invention provides a dental paste, methods of making and using the dental paste, and compositions prepared therefrom. The dental paste includes a hardenable resin and an acid-reactive filler disposed in the resin. The acid-reactive filler includes a silane-treated surface, wherein the silane includes a poly(alkylene oxide) group-containing silane. Surface-treated acid-reactive fillers, and methods of making and using the fillers, are also provided.

Abstract: A dental composition is provided comprising (a) a part A comprising fluoroaluminosilicate glass that has been surface treated with agents selected from the group consisting of silane, silanol and combinations thereof, and at least one fatty acid, dimer thereof, or trimer thereof; and (b) a part B comprising at least one polyacid. The composition further comprises resin that can be curable or non-curable and at least one initiator. The composition exhibits adhesion to dentin, and the treated FAS glass contained therein does not settle out with time.

Abstract: A dental composition is provided comprising

Abstract: In a first aspect, a method for treating hard tissue that includes: (a) applying to hard tissue a composition that includes a cationically active functional group, a free radically active functional group, and a polymerization initiator capable of initiating free radical polymerization, where the number of moles of cationically active functional groups per gram of composition is no greater than about 0.0075; and (b) exposing the composition to polymerization conditions to form an adhesive bonded to the hard tissue.

Abstract: The present invention provides a broadband transmitting protective coating (10) including an AlGaP protective layer (14) deposited on an optical substrate (12) and an anti-reflection film (16) deposited on the AlGaP protective layer (14). The coating (10) is suitable for use with typical infrared and broadband optical substrate materials such as germanium or multi-spectral ZnS. In the case of a germanium substrate (12), the anti-reflection film (16), (16a) preferably consists of a single layer of hard carbon or alternating layers of hard carbon and silicon. In the case of a multi-spectral ZnS substrate (12a), the anti-reflection film (16b) preferably consists of layered Al.sub.2 O.sub.3 /TaO.sub.5 /LaF.sub.3 /MgF.sub.2. The protective coating (10) is preferably deposited on the optical substrate (12) by a metal organic chemical vapor deposition process wherein an initial layer of AlP is nucleated on the substrate (12) at a temperature of approximately 400.degree. C.

Abstract: In a first aspect, a method for treating hard tissue that includes: (a) applying to hard tissue a composition that includes a cationically active functional group, a free radically active functional group, and a polymerization initiator capable of initiating free radical polymerization, where the number of moles of cationically active functional groups per gram of composition is no greater than about 0.0075; and (b) exposing the composition to polymerization conditions to form an adhesive bonded to the hard tissue.

Abstract: A measurement structure for determining the thickness of a specimen without mechanical contact but instead employing ultrasonic waves including an ultrasonic transducer and an ultrasonic delay line connected to the transducer by a retainer or collar. The specimen, whose thickness is to be measured, is positioned below the delay line. On the upper surface of the specimen a medium such as a drop of water is disposed which functions to couple the ultrasonic waves from the delay line to the specimen. A receiver device, which may be an ultrasonic thickness gauge, receives reflected ultrasonic waves reflected from the upper and lower surface of the specimen and determines the thickness of the specimen based on the time spacing of the reflected waves.