A gutta-percha-silver composite with determined weight percentage and particle size, is provided. The composite exhibits electro-conductivity greater than the standard gutta-percha composites. The new material simplifies root canal treatments, shortens the times both for clinician and patients, and reduces the exposure to patients from X-rays. The material is not only electro-conductive; it is anti-bacterial, which improves the outcomes of the procedures. Also, it has improved thermal conductivity, and mechanical properties.

Fluorescent nanoparticle compositions and methods of used for dental bonded restorations are provided herein.

Disclosed is a method of manufacturing a multilayer zirconia block for artificial teeth, including a first material mixing step of mixing a 3 mol % yttrium oxide-tetragonal zirconia polycrystal and an organic binder, a second material mixing step of mixing a 3 mol % yttrium oxide-tetragonal zirconia polycrystal, a 5 mol % yttrium oxide-tetragonal zirconia polycrystal and an organic binder, a third material mixing step of mixing a 5 mol % yttrium oxide-tetragonal zirconia polycrystal and an organic binder, a compression molding step of sequentially placing the mixtures obtained in the first material mixing step, the second material mixing step, and the third material mixing step in a mold for compression molding and performing compression molding, and a calcination step of calcining a compression molded product obtained in the compression molding step. This method provides a multilayer zirconia block that contains yttrium oxide, the amount of which is adjusted in the manufacturing process, thus showing a color similar to that of natural teeth after impregnation with a coloring solution.

A palladium-based alloy having a coefficient of thermal expansion (CTE) of about 12.0 to about 13.0 and having one or more of the following additive metals: platinum, gallium, chromium, molybdenum, tin, silicon, ruthenium, rhenium, indium, tungsten, niobium, boron and lithium.

Radically polymerizable, difunctional phenylene sulfide according to Formula I

##STR00001##

in which X, Y independently of each other in each case are absent or are O or NR.sup.6, R.sup.1, R.sup.2 independently of each other in each case are H, a linear or branched C.sub.1 to C.sub.10 alkyl radical, OR.sup.7, SR.sup.8, Cl or Br, R.sup.3 is absent or is a C.sub.1-C.sub.10 alkylene radical which can be interrupted by O or S, R.sup.4 is absent or is a C.sub.1-C.sub.10 alkylene radical which can be interrupted by O or S, wherein R.sup.3 and R.sup.4 cannot be absent at the same time, R.sup.5 is H or a C.sub.1-C.sub.5 alkyl radical, R.sup.6, R.sup.7, R.sup.8 independently of each other in each case are H or a linear or branched C.sub.1 to C.sub.10 alkyl radical, a, b, c, d independently of each other in each case are 0 or 1 and e is 1 or 2.

Provided are dental articles, and methods of making articles, having an aesthetic inorganic coating based on zirconia at least partially stabilized with yttrium oxide, calcium oxide, cerium oxide, or magnesium oxide. Stabilized zirconia coatings were found to provide a smooth, low friction surface having high abrasion resistance. These coatings are particularly applicable to orthodontic appliances. While virgin stabilized zirconia coatings can often have an undesirable color cast, it was discovered that this color cast can be substantially eliminated by heat treating the coated appliance in an oxygenated environment. The combination of depositing a stabilized zirconia coating and subsequently heat treating to decolorize the coating provides a surprisingly robust, stable, low-friction coating that is also aesthetic.

The dental curable composition of the present invention contains 100 parts by mass of a polymerizable monomer, 170 to 270 parts by mass of an inorganic filler (B) having an average particle diameter of 50 nm to 1 m and having a zeta potential of a constituent particle with either positive or negative polarity, and 5 to 50 parts by mass of an inorganic filler (C) composed of inorganic particles having a zeta potential opposite to that of (B) and having a specific surface area of 25 to 100 m.sup.2/g. According to the present invention, it is possible to provide a dental curable composition containing a polymerizable monomer and an inorganic filler, which can be suitably used as a flowable composite resin, the dental curable composition having a consistency suitable for discharge from a syringe equipped with a needle tip and good shapability without treating the inorganic filler with a special surface treating agent and without being affected by the type of the polymerizable monomer used, and being particularly suitably used as a flowable composite resin.

The dental curable composition of the present invention contains 100 parts by mass of a polymerizable monomer, 170 to 270 parts by mass of an inorganic filler (B) having an average particle diameter of 50 nm to 1 m and having a zeta potential of a constituent particle with either positive or negative polarity, and 5 to 50 parts by mass of an inorganic filler (C) composed of inorganic particles having a zeta potential opposite to that of (B) and having a specific surface area of 25 to 100 m.sup.2/g. According to the present invention, it is possible to provide a dental curable composition containing a polymerizable monomer and an inorganic filler, which can be suitably used as a flowable composite resin, the dental curable composition having a consistency suitable for discharge from a syringe equipped with a needle tip and good shapability without treating the inorganic filler with a special surface treating agent and without being affected by the type of the polymerizable monomer used, and being particularly suitably used as a flowable composite resin.

Provided are dental articles, and methods of making articles, having an aesthetic inorganic coating based on zirconia at least partially stabilized with yttrium oxide, calcium oxide, cerium oxide, or magnesium oxide. Stabilized zirconia coatings were found to provide a smooth, low friction surface having high abrasion resistance. These coatings are particularly applicable to orthodontic appliances. While virgin stabilized zirconia coatings can often have an undesirable color cast, it was discovered that this color cast can be substantially eliminated by heat treating the coated appliance in an oxygenated environment. The combination of depositing a stabilized zirconia coating and subsequently heat treating to decolorize the coating provides a surprisingly robust, stable, low-friction coating that is also aesthetic.

Provided are dental articles, and methods of making articles, having an aesthetic inorganic coating based on zirconia at least partially stabilized with yttrium oxide, calcium oxide, cerium oxide, or magnesium oxide. Stabilized zirconia coatings were found to provide a smooth, low friction surface having high abrasion resistance. These coatings are particularly applicable to orthodontic appliances. While virgin stabilized zirconia coatings can often have an undesirable color cast, it was discovered that this color cast can be substantially eliminated by heat treating the coated appliance in an oxygenated environment. The combination of depositing a stabilized zirconia coating and subsequently heat treating to decolorize the coating provides a surprisingly robust, stable, low-friction coating that is also aesthetic.