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Column-like structures of human dentin in carious and artificial lesions
1Department of Cariology and Endodontics, Dental Faculty, University of Bergen, Norway.
Scandinavian Journal of Dental Research
|October 1, 1991
Summary
Intact dentin columns act as pathways for acid diffusion in tooth decay and around fillings. Fluoride from glass ionomer and silicate cement fillings increases the radiopacity of these dentin columns.
Area of Science:
- Dental science
- Cariology
- Materials science
Background:
- Carious lesions and artificial lesions near dental fillings present complex microstructures.
- Understanding acid diffusion pathways is crucial for preventing secondary caries.
Purpose of the Study:
- To investigate the microstructure of carious and artificial lesions adjacent to amalgam, silicate cement, and glass ionomer fillings.
- To identify potential pathways for acid diffusion in human teeth.
Main Methods:
- Examination of serial sections from 36 human teeth with carious lesions.
- Analysis of artificial lesions adjacent to amalgam (AM), silicate cement (SI), and glass ionomer cement (GI) fillings.
- Utilized ordinary light microscopy and microradiography.
Main Results:
- Dentin columns were observed in demineralization and translucent/radiopaque zones of carious lesions.
- Artificial lesions near SI fillings showed alternating radiopaque and radiolucent columns.
- Glass ionomer cement (GI) and amalgam (AM) groups exhibited distinct column appearances at the cavity wall and lesion front.
- Increased radiopacity in SI and GI groups correlated with fluoride release.
Conclusions:
- Intact dentin columns are likely preferred pathways for acid diffusion in artificial and carious lesions.
- Fluoride release from glass ionomer and silicate cement enhances dentin column radiopacity.
- Findings suggest a mechanism for reduced secondary caries with fluoride-releasing materials.