RESTORATIVE DENTAL MATERIAL OF CORONA DENTIS OF CRYSTALLIZED GLASS OF CALCIUM PHOSPHATE SYSTEM

PURPOSE:A restorative dental material of corona dentis having properties and appearance close to those of natural tooth, improved affinity for organisms and beauty, consisting of crystallized glass of a calcium phosphate system having a specific ratio of calcium to phosphorus wherein the crystal is grown and arranged in a layer state on the cross section. CONSTITUTION:A restorative dental material of corona dentis such as corona dentis, inlay, bridge, etc. consisting of crystallized glass of calcium phosphate system having an atomic ratio of calcium to phophorus of 0.35-1.7, preferably 0.45-0.7, wherein its crystal is grown and arranged in a layer state on the cross section. The restorative dental material of corona dentis has composition, physical, chemical and mechanical properties, color tone, gloss, and appearance extremely close to those of natural tooth, so it has excellent affinity for organisms, can suppress mutual wear during clenching of teeth, and has no bad influence on the human body at all. It has improved beauty, good adhesiveness even in previous coating of ceramic, and a process can be shortened because it does not require an opaque layer.