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Updated: Jul 3, 2026
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Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
Published on: August 22, 2022
Characteristics of the aging rat mandible.
1Department of Oral and Maxillofacial Surgery, Soroka Medical Center, Ben-Gurion University of the Negev, PO Box 151, Beer-Sheva 84101, Israel.
Archives of Gerontology and Geriatrics
|July 26, 2008
Summary
Age impacts rat mandible shape, but not density. Sex influences body and mandible weight, linked to diet and chewing. Dental health remains intact in aging rats.
Area of Science:
- Osteology
- Comparative Anatomy
- Gerontology
Background:
- The aging process can affect bone structure and density.
- Understanding age-related changes in the mandible is crucial for comparative studies.
Purpose of the Study:
- To investigate the influence of age and sex on the physical characteristics of the rat mandible.
- To determine if morphometric and densitometric properties of the mandible change with age and sex.
Main Methods:
- Wistar rats were grouped by age (young/old) and sex (male/female).
- Mandible dimensions (weight, volume, length, etc.) and optical density were measured.
- Radiographic techniques and digital densitometry were employed.
Main Results:
- Body weight and mandible weight showed significant age and sex-related differences.
- Most morphometric parameters exhibited age-related changes, but not sex-related differences.
- No significant densitometric differences were observed across age or sex groups for specific mandibular regions.
Conclusions:
- Age-related changes in the rat mandible are specific to certain morphometric parameters, not universal.
- Densitometric properties of the mandible remain largely unaffected by age or sex.
- The integrity of dentition and normal masticatory function may preserve mandibular density during aging.
