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- Title
Investigating The Agenesis Pattern Of Permanent Teeth In Patients Aged 10 To 17 Referred To Radiology Clinics In Kashan From 2017 To 2019.
- Authors
Hashemzadeh, Zahra; Akbari, Hossein; Safaei, Mehran; Alizadeh, Atefeh
- Abstract
Objective: Dental agenesis is a relatively common complication. Since in previous studies, the prevalence of this dental anomaly has been reported to be diverse depending on the studied population, this study aimed to search for the pattern of agenesis of permanent teeth in a population of Kashan city according to the prevalence, severity and intraoral distribution between both sexes. Materials and Methods: 788 panoramic radiographs (488 women and 300 men) of patients aged 10 to 17 referring to oral and maxillofacial radiology centers in Kashan were evaluated during 2017-2019. The data was analyzed by SPSS22 software with a significance level of 0.05. Findings: Among 788 panoramic radiographs, 381 missing teeth were found. 183 people (23.22%) (65 men and 118 women) and 62 people (7.85%) had missing teeth without considering the third molar. The number of missing teeth (NMT) for the involved subjects was 2.08 in general and 1.80 without considering the third molar. In addition, in the case of NMT of other teeth except the third molar, in people with at least one missing third molar, it was 2.18 times more than the group with all third molars. Prevalence (p=0.792) and intensity (p=0.790) of dental agenesis in maxilla were comparable with mandible. The most common teeth involved were the third molar of mandible (11.4%) > Third molar of maxilla (11.3%) > Second premolar of mandible (3.4%) > Second premolar of maxilla (2.3%) > Lateral maxilla (1.8%), respectively. Although women were more involved, there was no significant gender difference in relation to dental agenesis in general (p=0.417) or separately for teeth. A total of 117 cases of symmetrical agenesis were found. Although the prevalence of unilateral agenesis was comparable to bilateral absence, the frequency of unilateral agenesis of mandibular second premolar (63%) and bilateral agenesis of maxillary lateral incisor (57.1%) was higher. Conclusion: The present study showed that the most common teeth involved in the studied population were the third molars, the second premolar of the mandible, the second premolar of the maxilla and the lateral incisor of the maxilla. The prevalence of agenesis of teeth and the number of agenesis per person involved were in the range reported in previous studies. No significant relationship was found between maxilla, gender, involved quadrants and unilateral or bilateral occurrence in relation to agenesis. Interestingly, the prevalence of agenesis of other teeth was up to 2.18 times in cases of absence of the third molar.
- Publication
Journal of Pharmaceutical Negative Results, 2022, Vol 13, p7928
- ISSN
0976-9234
- Publication type
Article
- DOI
10.47750/pnr.2022.13.S07.963