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Evaporative water loss from human dentine in vitro
H E Goodis1, L Tao, D H Pashley
1Department of Restorative Dentistry, University of California, San Francisco 94143.
Archives of Oral Biology
|January 1, 1990
Summary
Water loss from dentine occurs mainly through evaporation, especially when the smear layer is removed. Airflow significantly increases this evaporative water loss from dentine.
Area of Science:
- Dental science
- Biomaterials science
Background:
- Dentine fluid dynamics are crucial for understanding tooth health and treatment outcomes.
- The smear layer's role in dentine fluid movement is not fully understood.
Purpose of the Study:
- To quantify the rate of spontaneous water evaporation from dentine.
- To investigate the effect of airflow and smear layer presence on dentine water loss.
Main Methods:
- In vitro measurement of spontaneous water evaporation from extracted human teeth.
- Application of airflow (air blast) to dentine surfaces with and without a smear layer.
Main Results:
- Spontaneous water loss from dentine was unaffected by the presence or absence of the smear layer.
- Airflow significantly increased dentine evaporation.
- Airflow-induced water loss was doubled after smear layer removal.
Conclusions:
- Evaporation is the primary mechanism of fluid loss from dentine when the smear layer is intact.
- Smear layer removal enhances evaporative fluid loss and may lead to filtration exceeding evaporation.