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논문 기본 정보

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학술저널
저자정보
Rashsuren, Oyuntugs (Department of Oral and Maxillofacial Radiology, School of Dentistry, Mongolian National University Medical Science) Choi, Jin-Woo (Department of Oral and Maxillofacial Radiology, Dankook University College of Dentistry) Han, Won-Jeong (Department of Oral and Maxillofacial Radiology, Dankook University College of Dentistry) Kim, Eun-Kyung (Department of Oral and Maxillofacial Radiology, Dankook University College of Dentistry)
저널정보
대한영상치의학회 Imaging science in dentistry Imaging science in dentistry 제44권 제3호
발행연도
2014.1
수록면
229 - 236 (8page)

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Purpose: To investigate the prevalence of bifid and trifid mandibular canals using cone-beam computed tomography (CBCT) images, and to measure their length, diameter, and angle. Materials and Methods: CBCT images of 500 patients, involving 755 hemi-mandibles, were used for this study. The presence and type of bifid mandibular canal was evaluated according to a modified classification of Naitoh et al. Prevalence rates were determined according to age group, gender, and type. Further, their diameter, length, and angles were measured using PACSPLUS Viewer and ImageJ 1.46r. Statistical analysis with chi-squared and analysis of variance (ANOVA) tests was performed. Results: Bifid and trifid mandibular canals were found in 22.6% of the 500 patients and 16.2% of the 755 sides. There was no significant difference between genders and among age groups. The retromolar canal type accounted for 71.3% of the identified canals; the dental canal type, 18.8%; the forward canal type, 4.1%; and the trifid canal type, 5.8%. Interestingly, seven cases of the trifid canal type, which has been rarely reported, were observed. The mean diameter of the bifid and trifid mandibular canals was 2.2 mm and that of the main mandibular canal was 4.3 mm. Their mean length was 16.9 mm; the mean superior angle was $149.2^{\circ}$, and the mean inferior angle was $37.7^{\circ}$. Conclusion: Bifid and trifid mandibular canals in the Korean population were observed at a relatively high rate through a CBCT evaluation, and the most common type was the retromolar canal. CBCT is suggested for a detailed evaluation of bifid and trifid mandibular canals before mandibular surgery.
#Mandibular Nerve #Cone-Beam Computed Tomography #Anatomic Variation

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참고문헌 (21)

참고문헌 신청
Naitoh M / 2009 / Observation of bifid mandibular canal using cone-beam computerized tomography / Int J Oral Maxillofac Implants 24:155~159 google schola Langlais RP / 1985 / Bifid mandibular canals in panoramic radiographs / J Am Dent Assoc 110:923~926 google schola Carter RB / 1971 / The intra mandibular course of the inferior alveolar nerve / J Anat 108:433~440 google schola Nortjé CJ / 1977 / Variations in the normal anatomy of the inferior dental(mandibular)canal : a retrospective study of panoramic radiographs from 3612 routine dental patients / Br J Oral Surg 15:55~63 google schola Bogdán S / 2006 / Atypical courses of the mandibular canal : comparative examination of dry mandibles and x-rays / J Craniofac Surg 17:487~491 google schola

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