Correlation of Maxillary and Mandibular Base Lengths and Anterior Crowding in Class II Malocclusion
Keywords:
maxillary, mandibular, base length, crowdingAbstract
Introduction: In orthodontics dental crowding is more frequently present, causing malocclusion that require orthodontic treatment. Crowded dentition occurs when there is mismatch in tooth size and arch dimensions. The crowded dentition is the one in which tooth size is larger than the arch dimensions.1 This study was conducted is to evaluate the correlation between maxillary and mandibular base lengths and dental crowding in the anterior region of dental arch in class II malocclusion.
Material and Methods: This cross sectional study was performed Orthodontics Department of Fatima memorial Hospital, Lahore in six months. Study included 70 participants, their chronological age is in range of 13-30 years, for skeletal II SNA, SNB, ANB, and Wits value need to be measured. The skeletal base lengths are measured by evaluating Co-A and Co-Gn and to calculate maxillary and mandibular crowding by measuring arch length discrepancy by single examiner. To correlate crowding and base length need Pearson’s product moment correlation.
Results: Female strength were 33 (47.14%) while males strength were 37 (52.86%). Mean age of subjects was 21.66
± 4.81 years. So there is a significant, moderate and a negative correlation between base lengths and crowding in the maxillary arch (r=-0.44, P<0.001). Same is the case in lower arch, where there is also significant, moderate and inverse relation between lower base length and upper crowding (r=-0.31, P=0.008).
Conclusion: The correlation seen between skeletal base lengths and dental crowding in arches was statistically significant and are inverse relation.
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