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A histomorphometric analysis of the nature of the mandibular canal in the anterior molar region
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A histomorphometric analysis of the nature of the mandibular canal in the anterior molar region
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Journal Article
A histomorphometric analysis of the nature of the mandibular canal in the anterior molar region
2014
Overview
Objectives
Knowledge of the position and configuration of the mandibular canal is a basic requirement before implant placement in the mandible. Radiological studies suggest a positive correlation between alveolar trabecular bone quality and mandibular canal corticalization. The aim of this study was to test this assumption histomorphometrically in the anterior molar region, which is one of the most frequent places for implantation.
Materials and methods
Fifty thin ground sections (from 28 male and 22 female cadavers) of the first molar region were investigated for trabecular bone volume and thickness and the presence of a mandibular canal wall.
Results
Trabecular bone volume was significantly higher in males (
p
= 0.009). Further, it correlated significantly with the presence of a canal wall (rho = 0.585,
p
< 0.001), indicating that a reduced trabecular bone volume is associated with a reduced amount of bone surrounding the alveolar nerve. The cranial aspects of the canal wall were present at a significantly lower frequency (64.64 %) than the buccal, lingual, or caudal sides (
p
< 0.006).
Conclusion
The present study demonstrated that low trabecular bone volume correlates with only a fragmentarily present mandibular canal wall. This suggests that bone surrounding the alveolar nerve is of trabecular, not cortical, origin and possibly affected by reduction of the trabecular bone.
Clinical relevance
These results imply that oral surgeons should pay particular attention to implant placement in patients with low alveolar bone quality. The cranial aspects of the mandibular canal might be only fragmentarily or even completely missing. Consequently, they hardly present resistance during implant site preparation, and the risk for nerve injury, e.g., due to post-surgery hematoma, could be increased.
Publisher
Springer Berlin Heidelberg,Springer Nature B.V
Subject
