Proximal carious lesions and carious lesions of the root are differentiated by what feature?

Proximal carious lesions and carious lesions of the root are differentiated by what feature?

• A. Depth
• B. Color
• C. Location
• D. Size

Answer: (C)

The key idea is where the lesion is located on the tooth. Proximal caries occur on the interproximal surfaces between adjacent teeth, usually starting near the contact area and spreading through enamel into dentin. Caries of the root occur on exposed root surfaces, typically near the cementoenamel junction where cementum and dentin are uncovered by gingival recession. Because the defining feature is location—interproximal versus root surface—location is the most reliable way to distinguish between these two types. Depth, color, and size can vary with stage or staining and aren’t as consistent for telling them apart.

The key idea is where the lesion is located on the tooth. Proximal caries occur on the interproximal surfaces between adjacent teeth, usually starting near the contact area and spreading through enamel into dentin. Caries of the root occur on exposed root surfaces, typically near the cementoenamel junction where cementum and dentin are uncovered by gingival recession. Because the defining feature is location—interproximal versus root surface—location is the most reliable way to distinguish between these two types. Depth, color, and size can vary with stage or staining and aren’t as consistent for telling them apart.