Study of the shape and size of the maxillary incisors of the students of dentistry according to the Gerber’s embriogenetic principle

Abstract

The aim of this work was to find the pattern more prevalent according to Gerber’s embriogenetic principle. A sample of 100 students of Dentistry of San Marcos University between 18 and 27 years, without alterations in the upper anterior sector, were examinated clinically, photographic analysis and diagnostic models were conducted. Statistical analysis was performed with the program SPSS 19. Results: the most common biotype (according to Mayoral) was braquifatial (50 %), followed mesofatial (44 %) and dolicofatial (6 %). We find consistent agreement with the second and third postulate of Gerber (2nd postulated: proportion between size of the central incisors and lateral incisors, is similar to proportionbe tween the base and the nasal root; and postulated 3rd: there is a relationship between the angulation of the flat incisal and nasal base line - alar index); but was no agreement with the first postulate (1st postulated: the width of the four incisors would correspond to the length of the width of the nasal base). Also was found the central incisor mesiodistal diameter average 8. 62±0. 52 IC 95 8.55-8.69, side incisor average diameter 7.08±0. 55 IC 95 7.00-7.16 and four incisors diameter (31.07 to 31.75 mm IC 95) altogether, just this last measure there was no coincidence with the nasal base (37.32 to 38.7 mm IC 95). Nasal base was always greater than the diameter of the incisors which makes us understand that it is not a standard reference to select the diameter for aesthetic rebuilders aspects in Peruvian population.