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A human skeleton from the Ohguruwa remains.
Aichi-Gakuin Dental Science
|January 1, 1991
Summary
This study analyzed a well-preserved Jomon era skeleton (No. 2) from Nagoya, revealing a middle-aged male with significant tooth wear and a Class III skeletal pattern, likely due to diet and cultural practices.
Area of Science:
- Paleoanthropology
- Bioarchaeology
- Forensic Anthropology
Background:
- The Ohguruwa remains, discovered in Nagoya, date to the early Jomon era (circa 3000 B.C.).
- A well-preserved skeleton (No. 2) from this site provided a unique opportunity for detailed analysis.
Observation:
- Skeleton No. 2, a middle-aged male, exhibited characteristics typical of the Jomon period, including a stout structure.
- Significant occlusal tooth wear was observed, suggesting a hard diet and use of teeth as tools.
- Evidence of ritual tooth extraction (canines and first premolars) and horizontal alveolar bone loss was present, but caries and periodontal disease were minimal.
Findings:
- Cephalometric analysis indicated a Class III skeletal pattern, with the mandible in an anterior position (SNA 89.6°, SNB 89.2°, ANB 0.4°).
- The mastoid process was notably large and prominent, and the lateral mandibular prominence was well-developed.
- The masticatory system, including teeth, temporomandibular joints, and associated muscles, showed adaptive changes consistent with the observed skeletal and dental morphology.
Implications:
- This case provides insights into the dietary habits, oral health, and skeletal morphology of early Jomon populations.
- The findings contribute to understanding human adaptation and cultural practices during prehistoric Japan.
- Detailed bioarchaeological analysis of skeletal remains enhances our knowledge of ancient human populations and their lifestyles.