Contiguity between the mandibular canal and the mandibular third molar in panoramic tomography compared with cone beam computed tomography: a topographic analysis.

Deppe, Herbert; Ritschl, Lucas M; Kleinschmidt, Jana; Wagenpfeil, Stefan; Sculean, Anton (2019). Contiguity between the mandibular canal and the mandibular third molar in panoramic tomography compared with cone beam computed tomography: a topographic analysis. Quintessence international, 50(6), pp. 470-477. Quintessenz Verlags-GmbH 10.3290/j.qi.a42485

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OBJECTIVES The aim of the present study was to evaluate the topographic relationship between mandibular third molars and the mandibular canal in panoramic tomography and cone beam computed tomography (CBCT). METHOD AND MATERIALS Records of all patients visiting for removal of a mandibular third molar between January 2014 and December 2015 were evaluated retrospectively. In panoramic tomography, the relationship of the roots to the mandibular canal was diagnosed according to the literature. In CBCT scans, the panoramic plane was rebuilt and orthogonal images to that plane were analyzed. RESULTS A total of 56 mandibular third molars were eligible for the study. Superimposition of tooth apex and mandibular canal (Class I) was similarly often found in both radiographic techniques (P = .22). In contrast, contact of tooth apex and mandibular canal (Class II) was significantly more often seen in CBCT scans than in panoramic tomography (P = .039). No contact of tooth apex and mandibular canal (Class III) was similarly often seen in both radiographic techniques (P = .59). Contact of tooth apex and the mandibular canal (Class II) was significantly more often verified by CBCT imaging than was assumed in panoramic tomography. CONCLUSIONS Preoperative CBCT may be helpful in Class II cases for verification of the topographic relationship between the mandibular canal and mandibular third molars.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > School of Dental Medicine > Department of Periodontology

UniBE Contributor:

Sculean, Anton

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0033-6572

Publisher:

Quintessenz Verlags-GmbH

Language:

English

Submitter:

Doris Burri

Date Deposited:

20 Jan 2020 10:31

Last Modified:

20 Jan 2020 10:31

Publisher DOI:

10.3290/j.qi.a42485

PubMed ID:

31086860

Uncontrolled Keywords:

cone beam computed tomography mandibular canal mandibular third molar

BORIS DOI:

10.7892/boris.137770

URI:

https://boris.unibe.ch/id/eprint/137770

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