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Updated: Feb 7, 2026
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Development of Amelogenin-chitosan Hydrogel for In Vitro Enamel Regrowth with a Dense Interface
Published on: July 10, 2014
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Lesion Dehydration Rate Changes with the Surface Layer Thickness during Enamel Remineralization
Nai-Yuan N Chang1, Jamison M Jew1, Daniel Fried1
1University of California, San Francisco, San Francisco, CA 94143-0758, U.S.A.
Summary
A thicker mineralized surface zone on tooth enamel lesions significantly reduces fluid permeability. This finding is crucial for understanding remineralization and preventing dental caries progression.
Area of Science:
- Dental science
- Biomaterials science
- Biophysics
Background:
- Remineralization forms a mineralized surface zone on caries lesions, reducing permeability.
- The critical thickness of this surface zone for inhibiting fluid penetration remains unclear.
Purpose of the Study:
- To investigate the relationship between surface zone thickness and fluid permeability in simulated enamel caries lesions.
- To determine how remineralization duration affects surface zone development and lesion permeability.
Main Methods:
- Simulated enamel caries lesions were created and subjected to varying remineralization durations.
- Near-infrared (NIR) reflectance imaging (1400-2300 nm) was used to measure dehydration rates.
- Dehydration rates were correlated with the thickness of the remineralized surface zone.
Main Results:
- A strong correlation was observed between surface zone thickness and dehydration rate.
- The relationship between surface zone thickness and lesion permeability is highly non-linear.
- Even a small increase in surface layer thickness can substantially decrease permeability.
Conclusions:
- The study quantifies the non-linear relationship between enamel surface zone thickness and permeability.
- Findings suggest that optimizing remineralization to achieve a specific surface layer thickness is key to inhibiting caries progression.
- NIR reflectance imaging is a viable method for assessing lesion remineralization and permeability.
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