Root caries most commonly develop due to what condition?

Root caries most commonly develop due to what condition?

• A. Exposed root surfaces from gingival recession and alveolar bone loss
• B. Enamel hypoplasia
• C. Bruxism
• D. Fluorosis

Answer: (A)

Root caries occur on the tooth root where the surface is exposed. The key factor is exposure of dentin/cementum at the root due to gingival recession and loss of supporting alveolar bone from periodontal disease. Once the root surface is exposed, its dentin is much more vulnerable to caries because it is less mineralized and has open dentinal tubules that allow acids to diffuse more readily, so demineralization happens more easily than on enamel. Enamel hypoplasia involves defects in enamel formation on crowns, not an exposed root surface, so it doesn’t explain root caries. Bruxism causes wear from grinding, not caries development. Fluorosis affects enamel quality as well, not the exposure of root surfaces. So, the condition most linked to the development of root caries is exposed root surfaces resulting from gingival recession and alveolar bone loss.

Root caries occur on the tooth root where the surface is exposed. The key factor is exposure of dentin/cementum at the root due to gingival recession and loss of supporting alveolar bone from periodontal disease. Once the root surface is exposed, its dentin is much more vulnerable to caries because it is less mineralized and has open dentinal tubules that allow acids to diffuse more readily, so demineralization happens more easily than on enamel.

Enamel hypoplasia involves defects in enamel formation on crowns, not an exposed root surface, so it doesn’t explain root caries. Bruxism causes wear from grinding, not caries development. Fluorosis affects enamel quality as well, not the exposure of root surfaces.

So, the condition most linked to the development of root caries is exposed root surfaces resulting from gingival recession and alveolar bone loss.