Influence of arch form and interproximal contact size on lower anterior dental crowding by means of a finite element analysis.
Date
2017-11
Authors
Roldán Restrepo, Samuel Ignacio
Álvarez Tobón, Andrea
Correa Vélez, Santiago Alberto
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad CES
Abstract
Dental crowding is among the most common reasons for consultation in
orthodontics, and despite its association with multiple factors such as the anterior
component of force (ACF), arch form and interproximal contact size, no relation
between these variables has been reported. The objective of this study was to
establish the relation between arch form, interproximal contact size and dental
crowding in the lower arch through a finite element model (FEM). Nine models with
a basic geometry of the lower arch (3 oval, 3 square and 3 triangular) were
developed using Ansys® 16.0 software, each one with different contact sizes (point
to point, 1mm diameter and 2mm diameter) analyzed under one load. ACF
dissipation, strains, rotations and displacements were evaluated for each tooth.
Differences in displacement and rotation of each tooth with variations in arch form
and contact size were observed. Overall, triangular arches and point-to-point
contacts were related with the greatest number of displacements and rotations,
while arches with 2 mm wide interproximal contact points presented the greatest
stability. In conclusion, ACF tends to produce lower dental crowding, which can be
reduced with wide arches and interproximal reduction (IPR) that increases the size
of proximal contacts.
Description
Keywords
Coronas dentales, Facultad de odontología - Maestría en ciencia odontologícas, Odontología