Prevalence of periapical periodontitis and its association with previous root canal treatment, root canal filling length and type of coronal restoration –based on CBCT
Subject Areas : EndodonticsAlireza Elsagh 1 , parisa ranjbarian 2 , Azadeh Torkzadeh 3 , Parisa Taheri 4
1 - school of dentistry, Isfahan (khorasgan) Branch, Islamic Azad university, Isfahan, Iran
2 - Assistant Professor, Department of Endodontics, School of Dentistry, Isfahan (Khorasgan) Branch, Isfahan, Iran
3 - Department of oral and maxillofacial radiology, faculty of Dentistry, Isfahan (khorasgan) Branch, Islamic Azad University, Isfahan, Iran
4 - Department of oral and maxillofacial radiology, faculty of Dentistry, Isfahan (khorasgan) Branch, Islamic Azad university, Isfahan, Iran
Keywords: Periapical periodontitis, Cone-Beam Computed Tomography, Root Canal Therapy,
Abstract :
Background: Root canal length filling can be an effective factor in the occurrence of apical periodontitis lesions. This study aimed to investigate the prevalence of periapical periodontitis and its relationship with previous root canal treatment in terms of root canal length filling and crown filling type. Materials and Methods: In this cross-sectional observational study, the number of 264 root-treated premolar teeth and molars in patients referred to the Faculty of Dentistry of Azad University of Isfahan who had undergone root canal treatment at least one year ago was examined by CBCT radiography. A number of 630 canals with previous root treatment were selected. The screening protocol included an initial selection of roots followed by root alignment in three planes (coronal, sagittal, axial) to have a centrality in three planes. Then, root classification was done based on periapical presence, root filling length, and crown restoration type. Fisher's exact statistical test analyzed data. Results: No significant difference was observed between the filling length and the frequency of apical periodontitis in maxillary and mandibular molar and premolar teeth, maxillary and mandibular molars treated with roots (P<0.05). The lesions among canals with proper filling were significantly less than canals with short and long filling (p<0.001). However, there was no correlation between the type of restoration and apical periodontitis in the maxillary premolar and molar teeth, mandibular premolar and molar teeth that underwent root treatment (p=0.935). Conclusion: The highest incidence of apical periodontitis occurs in the first molar teeth and the mesiobuccal canal with under filling.
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