Abstract
Introduction: The dimensions of mandibular symphysis sets limitations to the amount of
possible lower incisor movements and restricting orthodontic tooth movements within these
boundaries being crucial for optimal results. Hence the purpose of this study was to determine
significance of symphyseal morphology and lower incisor position in Class I, Class II, Class III
malocclusions and facial patterns.
Material and Methods: Pretreatment Lateral Cephalograms of three hundred patients (aged
18 years and above) were taken and they were classified into skeletal malocclusions (n= 50 each
of Class I, II and III) and vertical facial patterns (n=50 each of low, normal and high angle).
Computer aided descriptive statistical analysis was performed using the SPSS 17.0 software.
Results: The correlation between symphyseal height and width with lower incisor inclination
proved significant in sagittal and vertical growth patterns.
Conclusions: It can be suggested from this study that symphyseal morphology and lower
incisor position is correlated to sagittal and vertical growth patterns. The biological limits of
tooth movement in a narrow symphysis, usually associated with high angle cases and Class III
cases, have unfavorable outcome.
Azmina Salmana, Sarah Qaseemc, Aisha Khanb. (2020) Association of symphyseal morphology with lower incisor inclination in sagittal and vertical growth patterns, Pakistan Orthodontic Journal, Volume 12, Issue 1.
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