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Questions and Answers
What is one effect of aging on enamel?
What happens to dentin as we age?
What is the result of continuous cementum deposition with age?
What happens to pulp tissue as we age?
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What is a clinical significance of pulp atrophy?
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What happens to the dentinal tubules with age?
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What is a characteristic of enamel as a result of aging?
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What is the result of continuous formation of secondary dentin with age?
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What happens to the number of dentinal tubules with age?
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What is a result of arteriosclerosis on the pulp tissue?
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What is a clinical significance of pulp atrophy?
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What is the result of continuous deposition of cementum with age?
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Study Notes
Effects of Aging on Oral Structures
Enamel
- Dehydration of enamel occurs with age
- Enamel thickness decreases due to attrition, abrasion, or erosion
- Craze lines and cracks appear on the enamel surface
Dentin
- Secondary dentin continuously forms, increasing in thickness and volume, and decreasing in permeability
- Tertiary and sclerotic dentin formation occurs
- Number of dentinal tubules decreases with age
- Peritubular dentin affects dentin permeability
- Dentin undergoes mineralization, filling tubule lumens, and sometimes completely obliterating them
Cementum
- Continuous deposition of cementum leads to hypercementosis
Pulp Tissue
- Decrease in number of cells, blood vessels, and nerves
- Increased collagen fibers
- Decrease in odontoblastic cells, fibroblasts, and undifferentiated dental pulp cells
- No effect of arteriosclerosis on the pulp
- Pulp atrophy or fibrous degeneration occurs, leading to:
- Accumulation of fibrous tissue, almost replacing all other tissues
- Decreased pulp healing capacity, leading to faster necrosis after microbial irritation
- Regression of pulp functions, decreasing ability to combat or recover from injury
Effects of Aging on Oral Structures
Enamel
- Dehydration of enamel occurs with age
- Enamel thickness decreases due to attrition, abrasion, or erosion
- Craze lines and cracks appear on the enamel surface
Dentin
- Secondary dentin continuously forms, increasing in thickness and volume, and decreasing in permeability
- Tertiary and sclerotic dentin formation occurs
- Number of dentinal tubules decreases with age
- Peritubular dentin affects dentin permeability
- Dentin undergoes mineralization, filling tubule lumens, and sometimes completely obliterating them
Cementum
- Continuous deposition of cementum leads to hypercementosis
Pulp Tissue
- Decrease in number of cells, blood vessels, and nerves
- Increased collagen fibers
- Decrease in odontoblastic cells, fibroblasts, and undifferentiated dental pulp cells
- No effect of arteriosclerosis on the pulp
- Pulp atrophy or fibrous degeneration occurs, leading to:
- Accumulation of fibrous tissue, almost replacing all other tissues
- Decreased pulp healing capacity, leading to faster necrosis after microbial irritation
- Regression of pulp functions, decreasing ability to combat or recover from injury
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Description
This quiz covers the effects of aging on oral structures, including enamel and dentin. It explores the changes that occur in these structures as we age, including dehydration, thickness decrease, and permeability changes.
