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The effect of occlusal loading on secondary tooth eruption: An experimental study using a rat model
Ourania Stergiopulos1, Aikaterini Lagou1, Gregory S Antonarakis1
1Division of Orthodontics, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland.
Journal of Morphology
|August 1, 2024
Summary
Occlusal loading impacts secondary tooth eruption in young rats, with less loading (soft diet) promoting more eruption. Adult rats showed minimal eruption differences regardless of diet consistency.
Area of Science:
- Developmental Biology
- Dental Research
- Animal Models
Background:
- Secondary tooth eruption is a complex process influenced by various factors.
- Understanding occlusal loading's role is crucial for developmental and regenerative dentistry.
Purpose of the Study:
- To investigate how occlusal loading affects secondary tooth eruption in a rat model.
- To quantify the influence of altered occlusal loading on the magnitude of secondary tooth eruption.
Main Methods:
- Utilized 48 Wistar rats (young and adult), divided into soft- and hard-food diet groups for 3 months.
- Employed microcomputed tomography (micro-CT) for precise tooth position analysis.
- Applied longitudinal data analysis using generalized estimating equations.
Main Results:
- Secondary tooth eruption occurred in all groups, irrespective of diet.
- Young rats on a soft diet (less occlusal loading) exhibited greater secondary eruption than those on a hard diet.
- Adult rats showed minimal differences in secondary eruption between diet groups over 3 months.
Conclusions:
- Occlusal loading significantly influences secondary tooth eruption in young rats with established occlusal contact.
- Reduced occlusal loading enhances secondary tooth eruption in growing individuals.
- This effect is not apparent in adult rats within a 3-month timeframe.
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