Inherited dental anomalies in the horse (Equidae, Equus caballus)

Russian J. Theriol.13(1): 17-26 come noticeably larger than others in respective dental group; 1.2.polydonty, that is increase of the teeth number as compared to the norm.The true polydonty is resulted from splitting of a tooth belonging to either permanent or to milk dentition.The false polydonty is resulted from preservation of one or occasionally more milk teeth together with permanent ones after their eruption.2. Orthodonty or misalignment -anomalies in position and/or orientation, that is alteration of tooth location within the dental arcade, which may involve: 2.1.displacement of the entire tooth relative to the dental arcade axis without its rotation; 2.3.rotation of the tooth around its vertical axis; the both variants may combine occasionally; 3. Anomalies in degrees of the teeth development, that is their hypo-or hypertrophy; 4. Anomalies in the shape of dental crown.It is usually difficult to identify precisely causes of the latter two types of anomalies, as they might be due to both inherited and external (mechanical etc.) conditions.Therefore, in the present paper the main attention is paid to the former two types of dental anomalies.Notwithstanding that particular dental anomalies were studied with much details in the domestic horse, a number of questions remains unclear concerning some