Journal of Peking University(Health Sciences) ›› 2014, Vol. 46 ›› Issue (6): 975-979.

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Accuracy analysis of cone beam computed tomography in assessing furcation involvements of mandibular molars

QIAO Jing1, DUAN Jin-yu1, SUN Chang-zhou1△, LIU Deng-gao2   

  1. (1. First Clinical Division, 2. Department of Oral Radiology, Peking University School and Hospital of Stomatology, Beijing 100034, China)
  • Online:2014-12-18 Published:2014-12-18

Abstract: Objective: To evaluate the accuracy of cone beam computed tomography (CBCT) in assessing furcation involvements of mandibular molars. Methods: In the study, 38 furcation involvements of 22 mandibular molars which would accept furcation surgery were included. Pre-surgical examination, CBCT and periapical radiograph were performed. Then, intra-surgical furcation assessments were compared with those data. Results: Intra-surgical findings confirmed 86.8% of the CBCT data, with a weighed kappa of 0.976. Of the four parameters tested of detailed root anatomy and furcation morphology, the vertical bone loss, the mesial-distal bone loss and the length of the root trunk revealed by CBCT were consistent with their respective intra-surgical values (P>0.05): about vertical bone loss, CBCT was (4.03±2.27) mm, but in surgery was (4.32±2.31) mm; about mesial-distal bone loss, CBCT was (2.05±0.89) mm, but in surgery was (2.07±0.97) mm; about length of the root trunk, CBCT was (2.35±0.88) mm, but in surgery was (2.24±0.75) mm. The horizontal bone loss revealed by CBCT [(3.40±1.27) mm] was significantly smaller than that by surgery [(3.72±1.19) mm]. However, the mean difference was only 0.32 mm. Periapical radiograph could only obtain vertical bone loss [(2.17±1.32) mm] and mesial-distal bone loss [(1.46±0.88) mm], which was significantly different from that obtained in surgery. Conclusion: CBCT proved high accuracy in assessing the furcation involvement of mandibular molars.

Key words: Cone-beam computed tomography, Furcation defect, Molar

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