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[Secular trend as a factor of craniofacial morphological changes]
1Stomatoloskog Fakulteta u Zagrebu.
Acta Stomatologica Croatica
|January 1, 1991
Summary
Secular trends caused craniofacial changes over 13 years. Cranial and facial indices decreased, with cranial length increasing and facial height decreasing.
Area of Science:
- Anthropology
- Orthodontics
- Human Biology
Background:
- Secular trends can influence human physical characteristics over time.
- Understanding craniofacial changes is crucial for fields like orthodontics and anthropology.
Purpose of the Study:
- To investigate craniofacial system alterations due to secular trends.
- To compare craniofacial measurements between two age-matched patient groups from different time periods.
Main Methods:
- Measurement of four basic craniofacial variables.
- Derivation of craniofacial indices from measured variables.
- Statistical analysis including parameter evaluation and comparison of means.
Main Results:
- Cranial indices showed a decrease, primarily driven by a significant increase in cranial length (glabella-opisthocranion).
- Facial indices also decreased, mainly due to a reduction in facial height (nasion-gnathion).
- These changes occurred over a 13-year period, indicating secular trend effects.
Conclusions:
- Secular trends have demonstrably altered craniofacial morphology over a 13-year span.
- Observed changes include decreased cranial and facial indices, with specific dimensional shifts in length and height.
- The findings highlight the dynamic nature of human craniofacial development in response to environmental or lifestyle factors.