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Microscopic study of the rabbit mandibular periosteum and attached structures.
T H Frankenhuis-van den Heuvel1, A M Kuijpers-Jagtman, J C Maltha
1Department of Orthodontics, University of Nijmegen, The Netherlands.
Acta Anatomica
|January 1, 1991
Summary
The mandibular periosteum in rabbits has two layers, with the inner layer revealing bone remodeling patterns. This suggests the periosteum, not masticatory muscles, may influence condylar growth.
Area of Science:
- Histology
- Oral Biology
- Developmental Biology
Background:
- The mandibular periosteum is crucial for bone growth and remodeling.
- Understanding its structure and function is key to comprehending jaw development.
- Previous studies have not fully elucidated the periosteum's role in condylar growth.
Purpose of the Study:
- To investigate the histological structure of the rabbit mandibular periosteum.
- To determine the functional state of the periosteum in relation to bone surface.
- To assess the potential influence of the periosteum and masticatory muscles on condylar growth.
Main Methods:
- Histological staining techniques were employed on rabbit mandibular periosteum.
- Polarization microscopy was used to analyze fiber orientation.
- Examination focused on different age groups to observe developmental changes.
Main Results:
- The mandibular periosteum comprises two distinct layers: an inner cellular layer and an outer fibrous layer.
- The inner layer exhibited reproducible patterns of bone resorption and deposition.
- Collagenous and elastin fibers in the outer layer showed specific directional arrangements.
- Masticatory muscles attach via endomysial or tendinous routes.
Conclusions:
- The periosteum's structure suggests a potential mechanical influence on mandibular condylar growth.
- This influence may vary throughout an organism's lifespan.
- Masticatory muscles appear to have a minor role in condylar activity compared to the periosteum.