Abstract:
The present invention discloses a set of dental color indicator devices and a method of selecting dental colors. Each indicator device has a number of color samples arranged in a regular array. Each of the samples corresponds to the color at a corresponding location in an identical array formed on one of a plurality of transverse parallel cuts through an elongate substantially elipsoid body which represents the possible range of dental colors when graphically represented on a color co-ordinate system, such as the CIELAB psycometric color system or the Munsell visual color system. The selected color is either the color of one of the samples or a mixture of the color of two adjacent samples.
Abstract:
A dental color mixture indicator device is described.In an embodiment, the dental color mixture indicator device (420) comprises four component indicator devices (400-403) each retained by a common base (410). Each component indicator device (400-403) has an array of color samples (Y1-2,C1-3,R1-2) mounted to individual blades (430,440-442,450-452,460-462), with each group of blades able to be plucked from the base (410) for the purposes of a comparison with a tooth. Each color sample (Y1-2,C1-3,R1-2) corresponds with an artificial tooth material, and, on the basis of the comparison, a mixture of the respective tooth materials allows correct color matching of a restorative tooth.The arrayed color samples (Y1-2,C1-3,R1-2), coincide with a corresponding location on a color co-ordinate system. The central colors (201) of each component indicator device (400-403) are offset from other ones of central colors with respect to the color co-ordinate system. This means a fewer number of samples are required than in the prior art to encompass the whole body of tooth color.
Abstract:
The invention relates to an improved, castable, synthetic resin material, suitable for use in dental and medical restorations, as a replacement for dental enamel and hydroxyapatite bone material. This material is also useful for electrical insulation. More specifically, the invention provides a filled reinforced resin matrix comprising a castable resin; from 5 to 50% vol of fibers of 50 .mu.m or less diameter; from 10 to 35% vol of a first particulate filler having a particle size range of 0.1 to 50 .mu.m; and from 5 to 25% vol of a second particulate filler having an ultimate particle size range of 10 to 100 nm.