Answer: B

Reasoning: Dystrophic calcification occurs in degenerated or necrotic soft tissues; in the oral cavity it most frequently manifests as pulp stones within the dental pulp. Numerous histologic studies describe pulp stones as the result of dystrophic mineral deposition in aging or inflamed pulpal tissue, not in enamel, dentin, or the periodontal ligament [Ninomiya et al., 2001, PMID 11485265].