Evaluation of the accuracy of linear measurements on multi-slice and cone beam computed tomography scans to detect the mandibular canal during bilateral sagittal split osteotomy of the mandible

AIM: The purpose of the study was to measure and compare the prevalence of mandibular canal (MC) location variations in regard to mandibular first molars in both genders at different age groups. METHODS: A retrospective study was performed on 80 cone-beam computed tomography scans. Distance between MC and apical apices of first molars, buccal and lingual cortical plates was measured in both sides. RESULTS: 80 scans with 160 sides were analyzed. Distances was measured bilaterally for all scans with mean (5.22 ± 0.77) in men versus (4.1 ± 0.7) in women at group age 31–40 apical to apices of first molars. The mean was (3.77 ± 0.62) in men versus (2.81 ± 0.47) in women at same age group at buccal side, lingually the mean was (4.02 ± 0.67) in men versus (3.67 ± 0.26) in women in the same age group. CONCLUSION: Our study showed that there were decrease in measurements in older age group in both genders and in female groups more than male groups but with no statistical significant difference.

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Radiographic and anatomic investigation on the prevalence of biﬁd mandibular canals in cone beam computed tomography scans

Sechenov Medical Journal ◽

10.47093/2218-7332_2018.3.54-58 ◽

2018 ◽

pp. 54-58

Author(s):

C. Casagrande ◽

S. G. Orestes ◽

A. D. Schroder ◽

A. A. De-Lima ◽

A. Franco ◽

...

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Dental Treatment ◽

Anatomic Variation ◽

Mandibular Canal ◽

Cone Beam ◽

Anesthetic Techniques ◽

Chi Square ◽

Computed Tomography Scans ◽

Chi Square Test

Background. Knowing the radiologic anatomy of the mandibular canal is essential to perform optimal anesthetic techniques in dentistry, especially in endodontic and surgical procedures. Biﬁd mandibular canals ﬁgure as anatomic variations that may hamper dental anesthesia and lead to surgical accidents.Objective. This study aims to investigate the prevalence of biﬁd mandibular canals in cone beam computed tomography (CBCT) images of patients under dental treatment.Material and methods. The sample consisted of 700 patients (448 females and 252 males) under dental treatment. CBCT images taken from each patient for dental treatment purposes were analyzed retrospectively in order to search for biﬁd mandibular canals. The detected biﬁd mandibular canals were classiﬁed according to their morphological arrangement and the prevalence of this anatomic variation was tested for association with patients’ sex using Pearson’s Chi-square test (2).Results. The prevalence rate of biﬁd mandibular canals reached 2% (n=14). Mandibular canals with an additional bifurcation towards the anterior region of the mandibular ramus were the most prevalent (100%). Lack of statistical association was observed between the occurrence of biﬁd mandibular canals and patients’ sex ( p >0.05).Conclusion. Despite uncommon, biﬁd mandibular canals may occur. Dentists must be aware of this anatomic variation to perform safely and optimally in the clinical routine.

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