The Relationship Between Incisor Crown Shape and Dental Crowding

Abstract

Aims: The aim of this study was to investigate if there is a correlation between the shape of the crowns of the incisors and crowding. Materials and Methods: Plaster models of 100 individuals having class I molar relationship were chosen .By using the irregularity index, 51 individuals (22 males and 29 females) were considered to be the crowding group(irregularity index >3mm),and 49 individuals (23 males and 26 females) were considered to be the normal group(irregularity index< 3mm).The casts were selected from the POP department at the college of dentistry in Mosul University. Repeated measurements of the maximum mesiodistal width of the incisal and cervical areas of the incisors were taken by means of a vernier caliper and a ratios of these measurements were calculated. Results:The mean value for the crowding group was significantly higher in the incisal area of lower incisors and upper central incisors than corresponding values in the normal group. A significant correlation was present between upper irregularity index and upper lateral incisor mesiodistal width ratio. Conclusions: The lower incisors were more triangulary shaped in the crowding group than those in the normal one.

Severity of mandibular arch crowding in different sagittal malocclusions

“…Findings of the study published by Awni contradicted those of the current study. [ 33 ] In this study, a significant positive correlation was found between crowding dentoskeletal parameters such as ANB, PP-MP, Occ-SN and negative with SNA, SNB, ACL, L1MP, and L1NB. Hence, any of the dentoskeletal characteristics, whether alone or in combination with other factors can be associated with the development of mandibular incisor crowding.…”