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Quantitative observation on teeth during calcium deprivation in rats
Scandinavian Journal of Dental Research
|July 1, 1977
Summary
Severe calcium deprivation impacts rat incisor development, particularly in pregnant and lactating females. This study reveals significant reductions in incisor ash content and dentin thickness under such dietary conditions.
Area of Science:
- Biochemistry
- Developmental Biology
- Nutritional Science
Background:
- Calcium is crucial for skeletal and dental development.
- Oxalate can interfere with calcium absorption.
- Pregnancy and lactation increase calcium demands.
Purpose of the Study:
- To investigate the effects of severe calcium deprivation on mandibular teeth development in adult female rats.
- To compare the impact on non-pregnant/non-lactating rats versus pregnant/lactating rats.
Main Methods:
- Adult female rats were fed a calcium-deficient diet with oxalate.
- Group A: Non-pregnant/non-lactating rats. Group B: Pregnant and lactating rats.
- Mandibular incisors and molars were analyzed for ash content and linear dimensions.
Main Results:
- Incisor ash content reduced by 27% in Group B, minimally in Group A.
- Incisor outer dimensions were unaffected, but pulp cavity increased in Group B due to reduced dentin thickness.
- Daily dentin apposition was severely reduced in Group B.
- Incisor enamel thickness and molar ash content were largely unaffected or only slightly reduced.
Conclusions:
- Severe calcium deprivation, especially during pregnancy and lactation, significantly impairs dentin formation in rat incisors.
- While enamel and molar composition show some resilience, dentin development is highly sensitive to calcium deficiency in this model.
- These findings highlight the critical role of adequate calcium intake during gestation and lactation for offspring dental health.