Preformed malleable dental articles and methods
View Patent ↗A hardenable dental article including a base and at least one outer surface extending from the base, wherein at least the base and the at least one outer surface of the hardenable dental article includes a hardenable dental material; and a multi-layer polymeric film conformable release liner in contact with at least a portion of the at least one outer surface.
1. A protected hardenable dental article comprising:
a hardenable dental article comprising a base and at least one outer surface extending from the base, wherein at least the base and the at least one outer surface of the hardenable dental article comprise a hardenable dental material; and
a multi-layer polymeric film conformable release liner in contact with at least a portion of the at least one outer surface; wherein the multi-layer polymeric film is removable from the hardenable dental article and comprises at least two dissimilar polymers in separate layers such that the multi-layer polymeric film comprises at least three layers, including a first outer layer, a second core layer, a third outer layer; and the multi-layer polymeric film exerts a tensile load of not more than 30 newtons at an extension from 325 to 600 percent and has an elastic recovery of not more than 85 percent at a tensile load of less than 0.044 newtons after recovery from an extension of 600 percent.
2. The article of claim 1 , wherein the at least two dissimilar polymers differ from each other in a characteristic selected from the group consisting of composition, crystallinity, modulus, maximum elongation, recovery load, surface energy, an optical property, and a combination thereof.
3. The article of claim 1 , wherein the multi-layer polymeric film is radially stretched to an area of at least 350 percent.
4. The article of claim 1 , wherein the multi-layer polymeric film is radially stretched to an area of 550 to 850 percent.
5. The article of claim 1 , wherein the multi-layer polymeric film has an elastic recovery of not more than 85 percent at a tensile load of less than 0.044 newtons after recovery from an extension of 325 percent.
6. The article of claim 1 , wherein the multi-layer polymeric film has an elastic recovery of less than 30 percent at a tensile load of 1.8 to 2.2 newtons after recovery from an extension of 325 percent.
7. The article of claim 1 , wherein each outer layer comprises a thermoplastic polymer selected from the group consisting of high density polyethylene, low density polyethylene, very low density polyethylene, polypropylene, poly(ethylene-co-propylene), poly(ethylene-co-hexene), poly(ethylene-co-octene), poly(ethylene-co-butene), poly(ethylene-co-vinyl acetate), poly(ethylene-co-vinyl alcohol), a polyurethane, and a combination thereof.
8. The article of claim 7 , wherein the thermoplastic polymer is selected from the group consisting of isotactic polypropylene, poly(ethylene-co-propylene) impact copolymer, high density polyethylene, and a combination thereof.
9. The article of claim 1 , wherein the second core layer comprises an elastic material, a plastic material, or a combination thereof, wherein the core layer has a tensile elongation at break value of at least 350 percent.
10. The article of claim 9 , wherein the second core layer is comprised of a polymer selected from the group consisting of linear low density polyethylene, very low density polyethylene, ultra-low density polyethylene, styrene-isoprene-styrene block copolymers, styrene-ethylene-co-butylene-styrene block copolymers, elastomeric polyurethanes, poly(ethylene-co-vinyl acetate), ethylene-propylene elastomeric copolymers, ethylene-propylene-diene elastomeric terpolymers, poly(ethylene-co-hexane), poly(ethylene-co-octene), poly(ethylene-co-butane), and a combination thereof.
11. The article of claim 10 , wherein the second core layer is comprised of a polymer selected from the group consisting of very low density polyethylene, ultra-low density polyethylene, styrene-isoprene-styrene block copolymers, styrene-ethylene -co-butylene-styrene block copolymers, and a combination thereof.
12. The article of claim 1 , wherein the base has an average percent flare of less than 12 percent.
13. The article of claim 1 , wherein the hardenable dental material is a photopolymerizable composite comprising a resin system, a filler system, and an initiator system, and wherein the photopolymerizable composite is self-supporting and malleable.
14. A kit comprising a plurality of protected hardenable dental articles of claim 1 .
15. The article of claim 1 , wherein the first outer layer and the third outer layer exert substantially the same recovery load.
16. The article of claim 1 , wherein the first outer layer and the third outer layer comprise the same polymer.
17. The article of claim 1 , wherein the first outer layer and the third outer layer have the same thickness.
18. The article of claim 1 , wherein the multi-layer polymeric film is radially stretched without causing a perforation in the multi-layer polymeric film.
19. The article of claim 1 , wherein the multi-layer polymeric film exerts a tensile load of not more than 30 newtons at an extension of 600 percent.