A three-dimensional printing system including a feed source of uncured filled resin material, a print head configured to apply discrete layers of a composition including upconversion phosphors, and a radiation source configured to irradiate layers of uncured filled resin material and deposited layers of the composition is provided. A method of three dimensionally printing a dental article is also provided.

ZrO.sub.2-toughened glass ceramics having high molar fractions of tetragonal ZrO.sub.2 and fracture toughness value of greater than 1.8 MPa.Math.m.sup.1/2. The glass ceramic may also include also contain other secondary phases, including lithium silicates, that may be beneficial for toughening or for strengthening through an ion exchange process. Additional second phases may also decrease the coefficient of thermal expansion of the glass ceramic. A method of making such glass ceramics is also provided.

ZrO.sub.2-toughened glass ceramics having high molar fractions of tetragonal ZrO.sub.2 and fracture toughness value of greater than 1.8 MPa.Math.m.sup.1/2. The glass ceramic may also include also contain other secondary phases, including lithium silicates, that may be beneficial for toughening or for strengthening through an ion exchange process. Additional second phases may also decrease the coefficient of thermal expansion of the glass ceramic. A method of making such glass ceramics is also provided.

A curable mixture and method of using the mixture are disclosed. In some embodiments, the mixture comprises an alginate polymer, and comprises properties suitable for use as a tooth filling after curing.

Masking compositions useful for dental restoration, particularly masking compositions used as a coating to mask the unnatural color of milled lithium-silicate glass-ceramic dental restorations in soft states before crystallization cycle, and method of making same. Some embodiments relate to masking compositions comprising at least one glaze powder, at least one opacifier, and at least one colorant. Some embodiments relate to coating, drying, cooling, characterizing, and firing of dental restorations.

Disclosed is a resin modified dental luting cement composition having a polymerizable resin component, a polyacidic polymer component, a filler component, a redox initiator system, and water.

Disclosed is a resin modified dental luting cement composition having a polymerizable resin component, a polyacidic polymer component, a filler component, a redox initiator system, and water.

A dose applicator for preparing a mixture at a point of use includes a housing defining an interior and an opening. First and second ampoules are contained in the interior, wherein the first ampoule contains a first component and the second ampoule contains a second component comprising one or more antifungal agent. An applicator tip is secured in the opening so that when the first and second ampoules are broken, the first and second components mix to form the mixture and the mixture can egress from the application tip.

A method for coloring a porous ceramic dental body that includes: applying at least one coating of a liquid coloring composition to at least a portion of a surface area of the porous ceramic dental body, the liquid coloring composition comprising: (a) at least one opaquing agent comprising a material comprising Zn, Al, Si, or a combination thereof; (b) at least one coloring agent comprising a material comprising Fe, Ni, Cu, Mn, Co, Cr, Mo, Pr, Nd, Er, Ce, Tb, or a combination thereof, (c) at least one wetting agent; and (d) at least one solvent; and sintering the coated porous ceramic dental body to obtain a fully sintered ceramic body having a density that is at least 98% of the theoretical density.

A method for coloring a porous ceramic dental body that includes: applying at least one coating of a liquid coloring composition to at least a portion of a surface area of the porous ceramic dental body, the liquid coloring composition comprising: (a) at least one opaquing agent comprising a material comprising Zn, Al, Si, or a combination thereof; (b) at least one coloring agent comprising a material comprising Fe, Ni, Cu, Mn, Co, Cr, Mo, Pr, Nd, Er, Ce, Tb, or a combination thereof, (c) at least one wetting agent; and (d) at least one solvent; and sintering the coated porous ceramic dental body to obtain a fully sintered ceramic body having a density that is at least 98% of the theoretical density.