Document Detail

A study of the position of the mandibular foramen in adult black Zimbabwean mandibles.
MedLine Citation:
PMID:  11317587     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: To determine the position of the mandibular foramen on dry adult mandibles and hence provide valuable information for dental and other health practitioners for successful inferior alveolar nerve anaesthesia. DESIGN: A cross sectional study. SETTING: Department of Anatomy, Faculty of Medicine, University of Zimbabwe, Mount Pleasant, Harare, Zimbabwe. SUBJECTS: 38 dry mandibles from adult black Zimbabweans. MAIN OUTCOME MEASURES: The anterior and posterior rameal widths, upper and lower rameal heights and the height of the lingula were measured with respect to the position of the mandibular foramen. The distribution of the foramen in relation to the occlusal plane was determined. RESULTS: The results showed that the position of the mandibular foramen was highly individualistic but on average lies at about 2.56 mm (right) and 2.08 mm (left) behind the midpoint of rameal width and at approximately 3 mm superior to the midpoint of rameal height on both sides. The mean anterior and posterior rameal widths were respectively 18.95 +/- 0.41 and 14.30 +/- 0.35 while the mean rameal heights were respectively 22.50 +/- 0.50 (upper) and 28.44 +/- 0.65 (lower). The distribution of the foramen in relation to the occlusal plane was 47.1% at the same level with the occlusal plane, 29.4% above, and 23.5% below the plane. There was no side variation in the position of the foramen in relation to the occlusal plane, in the dimensions of the ramus and in the size of the mandibular foramen but individual variations exist. The height of the lingula however showed great variation. The mean height was 8.40 +/- 0.39 (right) and 8.36 +/- 0.38 (left). CONCLUSION: The study has shown similarities and differences between the rameal dimensions and the position of the mandibular foramen in adult black Zimbabwean mandibles and those of other subpopulations. The clinical significance of accurately locating the mandibular foramen during a local anesthetic block of the inferior alveolar nerve is discussed.
E F Mbajiorgu
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Central African journal of medicine     Volume:  46     ISSN:  0008-9176     ISO Abbreviation:  Cent Afr J Med     Publication Date:  2000 Jul 
Date Detail:
Created Date:  2001-04-24     Completed Date:  2001-05-21     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0372566     Medline TA:  Cent Afr J Med     Country:  Zimbabwe    
Other Details:
Languages:  eng     Pagination:  184-90     Citation Subset:  IM    
Department of Anatomy, Faculty of Medicine, University of Zimbabwe, P O Box MP 167, Mount Pleasant, Harare, Zimbabwe.
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MeSH Terms
African Continental Ancestry Group*
Cephalometry* / methods
Cross-Sectional Studies
Image Processing, Computer-Assisted
Mandible / anatomy & histology*,  innervation
Nerve Block
Reference Values

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