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A Clinical and Cephalometric Study of the Influence of Mandibular Third Molars on Mandibular Anterior Teeth

Aims and objectives: The aim of this study was to determine the influence of erupted, impacted or missing mandibular third molars on the mandibular anterior teeth. Materials and methods: This study consisted of mixed population of 50 subjects with an age group 17 to 25 years. They were divided into three groups as erupted, impacted and agenesis of mandibular third molars whether they are responsible for crowding of lower anterior teeth. Results and conclusion: It was observed that average size of anterior teeth in erupted and impacted groups and the length of arch when measured from canine to canine found short in both the groups resulting in lower anterior crowding whereas in the case of agenesis of third molar the mean value of teeth size was less than arch length from canine to canine. Various linear and angular measurements from true lateral cephalograms were compared to find the labial inclination of the lower anterior teeth and it was found that it was influenced by the presence of lower third molars.