Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/48087
Title: Lower incisor dentoalveolar compensation and symphysis dimensions among Class I and III malocclusion patients with different facial vertical skeletal patterns
Author: Molina Berlanga, Núria
Llopis Pérez, Jaime
Flores Mir, Carlos
Puigdollers Pérez, Andrés
Keywords: Dents
Maloclusió
Maxil·lars
Teeth
Malocclusion
Jaws
Issue Date: 1-Oct-2013
Publisher: Allen Press Inc.
Abstract: Objective: To compare lower incisor dentoalveolar compensation and mandible symphysis morphology among Class I and Class III malocclusion patients with different facial vertical skeletal patterns. Materials and Methods: Lower incisor extrusion and inclination, as well as buccal (LA) and lingual (LP) cortex depth, and mandibular symphysis height (LH) were measured in 107 lateral cephalometric x-rays of adult patients without prior orthodontic treatment. In addition, malocclusion type (Class I or III) and facial vertical skeletal pattern were considered. Through a principal component analysis (PCA) related variables were reduced. Simple regression equation and multivariate analyses of variance were also used. Results: Incisor mandibular plane angle (P < .001) and extrusion (P  =  .03) values showed significant differences between the sagittal malocclusion groups. Variations in the mandibular plane have a negative correlation with LA (Class I P  =  .03 and Class III P  =  .01) and a positive correlation with LH (Class I P  =  .01 and Class III P  =  .02) in both groups. Within the Class III group, there was a negative correlation between the mandibular plane and LP (P  =  .02). PCA showed that the tendency toward a long face causes the symphysis to elongate and narrow. In Class III, alveolar narrowing is also found in normal faces. Conclusions: Vertical facial pattern is a significant factor in mandibular symphysis alveolar morphology and lower incisor positioning, both for Class I and Class III patients. Short-faced Class III patients have a widened alveolar bone. However, for long-faced and normal-faced Class III, natural compensation elongates the symphysis and influences lower incisor position.
Note: Reproducció del document publicat a: http://dx.doi.org/10.2319/011913-48.1
It is part of: The Angle Orthodontist, 2013, vol. 83, num. 6, p. 948-955
Related resource: http://dx.doi.org/10.2319/011913-48.1
URI: http://hdl.handle.net/2445/48087
ISSN: 0003-3219
Appears in Collections:Articles publicats en revistes (Genètica, Microbiologia i Estadística)

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