Sound natural teeth are defined as teeth that are free of active or chronic clinical decay, have at least. 50% bone support and are functional in the arch. Medical Coverage Policy | Dental. Services for Accidental Injury.
Horse(noun) anything, actual or figurative, on which one rides as on a horse; a hobby. Horse(noun) a mass of earthy matter, or rock of the same character as the wall rock, occurring in the course of a vein, as of coal or ore; hence, to take horse -- said of a vein -- is to divide into branches for a distance.
For other uses, see Horse (disambiguation). The horse, sometimes called a prad, (Equus ferus caballus) is one of two extant subspecies of Equus ferus. It is an odd-toed ungulate mammal belonging to the taxonomic family Equidae. The horse has evolved over the past 45 to 55 million years from a small multi-toed creature, Eohippus, into the large, single-toed animal of today.