Prevalence of Occlusion of Different Teeth in Panoramic Radiography of Patients Referred to the Oral and Maxillofacial Radiology Clinic in Yasuj During 2017-2018

Tooth occlusion is a common anomaly that is caused by several factors including local and systemic factors. The most common teeth that may be occluded are tertiary permanent teeth, maxillary canines, maxillary and mandibular premolars, and maxillary central incisors. The aim of the present study was to investigate the prevalence of occlusion of different teeth in patients referred to the Oral and Maxillofacial Radiology Clinic in Yasuj during 2017-2018

In this retrospective study, 2536 digital panoramic radiographs were studied among patients who were over 14 years old and referred to the Oral and Maxillofacial Radiology Clinic in Yasuj during the years 2016 to 2017. Patients with a history of trauma, developmental abnormalities, syndromic, pathological problems, and edentulousness were excluded. Radiographs were taken with the VATECH digital panoramic device (pax-i3D). The graphs were examined and a tooth was considered to be occluded, which was prevented from growing normally by a bone or a lateral tooth, as well as a tooth whose occlusal surface was visibly lower than the occlusal surface of adjacent teeth. Chi-square test was used to examine the relationship between age and type of impacted teeth and the difference between men and women in terms of impacted teeth.

Out of 2536 patients, the maxillary molar teeth (number=57) were 2.2%, mandibular molar teeth (number = 46) 1.8%, maxillary canine (number=39), 1.5%, maxillary premolars, respectively. Number=8) 30%, canine (number=7) 3% and incisor (number=4) was 4.2%, which had the most impacted teeth related to the maxillary molars and there were no mandibular premolars and mandibular incisors in this study. There was no significant difference between age and sex in terms of latency.

Dental occlusion in Yasuj city is not considered high, and the highest prevalence of occlusion is after maxillary molars, mandibular molars and maxillary canines. Therefore, if the canine teeth do not grow in time, radiography is recommended to examine their occlusion and use appropriate treatment.