title: [Preliminary study of homogeneous phase redeposition of dissolved dental subgingival calculus].
abstract: Fresh dental calculus were scratched and rinsed with distilled water, and then dissolved by HNO3. Simulated body fluid was used as control. Aqueous ammonia was added to step up the pH. FSEM and FI-IR were used to analyze the crystal character of deposition. Turbid occurred when pH = 5.4 and deposition occurred when pH = 5.6. Ribbon-like crystal, which was the same as the crystal in natural dental calculus was observed in experimental group and was evidenced to be hydroxyapatite (HAP) by FT-IR. HAP formation through homogeneous phase redeposition of dissolved dental subgingival calculus may be related with the existing template molecules in dental subgingival calculus resolution, which induce the biomineralization of HAP formation.
authors.affiliation: Department of Stomatology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan 430030, China. bzhou@tjh.tjmu.edu.cn
authors.forename: Bin
authors.initials: B
authors.lastname: Zhou
authors.forename: Yinping
authors.initials: Y
authors.lastname: Zeng
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
authors.forename: Nianjing
authors.initials: N
authors.lastname: Rao
authors.forename: Hui
authors.initials: H
authors.lastname: Xie
mesh_terms: D002114:Calcinosis / Q000473:pathology; D002130:Calcium Phosphates / Q000737:chemistry; D003461:Crystallography; D003728:Dental Calculus / Q000737:chemistry*; D003773:Dental Plaque / Q000737:chemistry; D005882:Gingival Diseases / Q000209:etiology*; D006801:Humans; D006882:Hydroxyapatites / Q000737:chemistry*
chemical_list: D002130:Calcium Phosphates; D006882:Hydroxyapatites