Resumen

RIOS ANTEZANA, María Liliana et al. Reducing the number of teeth, developmental trend of man Univll´es Dental Clinic La Paz 2013-2014. Rev. Inv. Inf. Salud [online]. 2017, vol.12, n.30, pp. 12-18. ISSN 2075-6194.

Tooth agenesis is used to desígnate the congenital absence of one or more dentalpieces, due to a disturbance in the stages of initiation or early morphogenesis of the same. A research was carreed out with the aim of proposing the existence of a type of dental evolution that takes place day by day and that can be presented in our environment. This is a cross-sectional descriptive study taking into account as a universe of 1000 patients, presenting 76 patients with Agenesia that would be the study population, between 12-45 years of both sexes, Wilcoxon statistical treatment was performed as a test of reliability of the 95% and with a significance valué of 0.05 (P <0.05). The results found are: Tooth agenesis is greater in the female sex in 66% (50 patients), 58% (44 patients) of higher prevalence in the upper jaw, 61% (46 patients) more in the left hemiarch and the dental group with greater agenesis is that of the molars in 88% (67 patients). With the disadvantage that other alterations (size, retention, shape) and thepossibility of reducing the presence of some pathology (retention of teeth, cysts or tumors) may occur in the future. It is concluded that there is a regression in the number of dental pieces and that in the first instan-ce the agenesis of the third molars will be presented followed by the premolars; obtaining the following: 11/2 C 1/1 P 1/2 M 2/2.

Palabras llave : Dental evolution; Dental agenesis; Dental system.