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Asymmetric bone remodeling in mandibular and maxillary tori
Jean-Daniel Kün-Darbois1,2, Bernard Guillaume3,4, Daniel Chappard3
1GEROM Groupe d'Etude Remodelage Osseux et bioMatériaux, Research Group on Bone Remodeling and bioMaterials, LHEA, IRIS-IBS Institut de Biologie en Santé, Université d'Angers, 4 rue Larrey, 49933, Angers Cedex, France. daniel.kun-darbois@univ-angers.fr.
Clinical Oral Investigations
|February 24, 2017
Summary
Tori, bony outgrowths, exhibit specific asymmetric bone remodeling, differentiating them from exostoses. This unique histological feature, involving lamellar bone and high mineral apposition rates, defines their morphology.
Area of Science:
- Oral pathology
- Bone biology
- Histomorphometry
Background:
- Tori are common, asymptomatic bony outgrowths in the oral cavity (torus palatinus, mandibularis, maxillaris).
- Their histological characteristics are typically unspecific, showing normal cortical and trabecular bone.
- Specific morphological and histomorphometric features of tori require detailed investigation.
Purpose of the Study:
- To elucidate the specific morphological and histomorphometric characteristics of tori.
- To identify unique histological features that may differentiate tori from other bone outgrowths like exostoses.
Main Methods:
- Histological analysis of 18 surgically removed tori.
- 3D microcomputed tomography for structural analysis.
- Measurement of mineral apposition rate (MAR) using tetracycline labeling.
- Identification of osteoid and osteoclasts using specific staining techniques.
Main Results:
- Tori predominantly consist of lamellar Haversian bone (16/18 cases).
- Asymmetric bone remodeling was observed in 15 tori, with osteoid deposition on one side and osteoclasts on the other.
- A high MAR was detected on both the outer surface and within Haversian canals.
Conclusions:
- Tori possess a distinct asymmetric bone remodeling pattern that likely shapes their growth.
- This specific histological feature may serve to distinguish tori from exostoses.
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