Universität zu Köln

Nickenig, Hans-Joachim, Wichmann, Manfred, Eitner, Stephan, Zoeller, Joachim E. and Kreppel, Matthias (2015). Lingual concavities in the mandible: A morphological study using cross-sectional analysis determined by CBCT. J. Cranio-MaxilloFac. Surg., 43 (2). S. 254 - 260. EDINBURGH: CHURCHILL LIVINGSTONE. ISSN 1878-4119

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Abstract

Background: Lingual undercuts are common in the edentulous mandible and pose the risk of perforating the lingual cortical bone during insertion of dental implants, which may lead to hemorrhage or infections of the parapharyngeal space. The aim of our study was to determine the occurrence and extent of lingual undercuts in the molar and premolar/canine region of the mandible. Methods: We analyzed 716 cross-sections of the edentulous molar region and 215 cross-sections of the edentulous first premolar/canine region. Mandibular morphology was classified into a U-configuration (undercut), P-configuration (parallel), and C-configuration (convex), depending on the shape of the alveolar ridge. Depth of the lingual concavity, concavity angle, and further parameters were measured to describe the mandibular morphology. Results: Lingual undercuts had a prevalence of 68% in the molar region. The prevalence was significantly higher in the second molar region (90%) than in the first molar region (56%). A deep position of the inferior alveolar nerve close to the basal cortical bone was significantly associated with the presence of lingual undercuts. Conclusion: Lingual undercuts are a frequent in the edentulous mandible. Cross-sectional analysis of three-dimensional radiographs provides the opportunity to determine a lingual undercut and to prevent complications of perforating the lingual cortical bone. (C) 2014 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Nickenig, Hans-Joachim UNSPECIFIED UNSPECIFIED UNSPECIFIED Wichmann, Manfred UNSPECIFIED UNSPECIFIED UNSPECIFIED Eitner, Stephan UNSPECIFIED UNSPECIFIED UNSPECIFIED Zoeller, Joachim E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kreppel, Matthias UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-411422
DOI:	10.1016/j.jcms.2014.11.018
Journal or Publication Title:	J. Cranio-MaxilloFac. Surg.
Volume:	43
Number:	2
Page Range:	S. 254 - 260
Date:	2015
Publisher:	CHURCHILL LIVINGSTONE
Place of Publication:	EDINBURGH
ISSN:	1878-4119
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language BEAM COMPUTED-TOMOGRAPHY; ENDOSSEOUS IMPLANT PLACEMENT; AMERICAN WHITE-POPULATIONS; CONE-BEAM; ARCH FORMS; PANORAMIC RADIOGRAPHS; INTERFORAMINAL REGION; DENTAL IMPLANTS; FOLLOW-UP; BONE Multiple languages Dentistry, Oral Surgery & Medicine; Surgery Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/41142