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[Root caries--scanning electron microscopic observations].
R Heinrich1, J Hornová, S Kneist
1Wissenschaftsbereich Präventive Stomatologie, Sektion Stomatologie der Medizinischen Akademie, Erfurt.
Zahn-, Mund-, Und Kieferheilkunde Mit Zentralblatt
|January 1, 1990
Summary
This study examined carious root surfaces in teeth with periodontal disease using scanning electron microscopy (SEM). Sclerotic dentin was found to delay bacterial invasion into the root dentin.
Area of Science:
- Oral microbiology
- Periodontology
- Dental caries research
Background:
- Periodontal disease leads to root surface exposure and increased susceptibility to caries.
- Root caries is a significant concern in patients with periodontal attachment loss.
- Understanding the microbial environment and host response is crucial for managing root caries.
Purpose of the Study:
- To characterize the microflora on carious root surfaces of teeth with periodontal attachment loss.
- To investigate the interaction between bacteria and root dentin structure.
- To assess the role of sclerotic dentin in preventing bacterial invasion.
Main Methods:
- Scanning electron microscopy (SEM) was used to examine 24 extracted human teeth.
- Teeth exhibited extensive periodontal attachment loss and carious root surfaces.
- Microflora composition and bacterial penetration into dentin were analyzed.
Main Results:
- A complex microflora, including filamentous bacteria, rods, and cocci, was observed on radicular surfaces.
- Bacterial invasion into exposed peripheral root dentin was noted.
- Sclerotic dentin appeared to impede or delay bacterial invasion into the dentin.
Conclusions:
- Carious root surfaces in periodontally compromised teeth harbor a diverse bacterial community.
- Sclerotic dentin acts as a protective barrier, delaying bacterial progression into the root structure.
- Further research can inform strategies for preventing and treating root caries in susceptible populations.