Abstract
ObjectivesIn endodontic practice, clinicians should be aware of possible root canal anatomic variations. The aim of this study was to assess using CBCT acquisitions regarding whether one root canal anatomy of a tooth is associated with a specific anatomy of another tooth.MethodsA total of 106 CBCT acquisitions were obtained using a CBCT scanner with 200μm voxel size. Numbers of roots and canals of the entire dentition were described. Bivariate analyses and logistic regressions were conducted to explore root canal anatomy on one tooth according to age, gender, jaw, side and the others teeth. Multiple correspondence analysis (MCA) was performed to correlate the different numbers of canals profiles.ResultsA total of 2424 teeth were analyzed. Independently from the other variables, the presence of an additional root canal on a mandibular incisor increases the risk of having an additional root canal on a mandibular premolar (OR [95%] 3.7 [1.0;13.2]). The mandibular molar variability increases in women compared to men (OR [95%] 0.4 [0.1; 0.9]). MCA showed correspondence between 2-canals maxillary incisor and canines and 5-canals maxillary molars, and some correlation between additional canal on maxillary and mandibular premolars.ConclusionsAlthough CBCT examinations are conducted in the first intention of making a diagnosis or prognostic evaluation, medium FOV acquisitions could be used as an initial database thus furnishing preliminary evaluations and information. In endodontic practice, clinicians should be aware of possible root canal anatomic variations. The visualization of all canals is considered essential in endodontic therapy. The use of multi-correspondence analysis for statistics in endodontic research is a new approach as a prognostic tool.
Highlights
Root canal systems have been described as complex anatomical structures with significant implication on root canal preparation
Cone-beam computed tomography (CBCT) examinations are conducted in the first intention of making a diagnosis or prognostic evaluation, medium field of view (FOV) acquisitions could be used as an initial database furnishing preliminary evaluations and information
Clinicians should be aware of possible root canal anatomic variations
Summary
Root canal systems have been described as complex anatomical structures with significant implication on root canal preparation. Various factors such as genetics and ethnic differences, have been reported to influence root canal anatomy [1,2]. Visualization of root canal anatomy is, of major interest in the practice of dentistry and considered essential in endodontic therapy. Successful root canal treatment is dependent on a detailed understanding of the morphology of the root canal system. Adequate debridement, shaping, and complete obturation in three dimensions are based on knowledge of normal anatomy and variations from the norm. Clinicians should be aware of common root canal configurations and possible anatomic variations [2,3]
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