title: Histopathological reactions of calcium phosphate cement.
abstract: Calcium phosphate cement (CPC) consisting of Ca4 (PO4)2O and CaHPO4 (2H2O) was recently developed. This study evaluated in vivo aspects of CPC and CPC mixtures compared to those of commercial hydroxyapatite (HP) and several endodontic materials: Grossman's cement (GC), calcium hydroxide-iodine paste (CHP) and gutta-percha plate (GP). Biocompatibility of subcutaneous implants in Donryu rats was evaluated after one month. Results showed very slight inflammatory reactions from CPC, CPC mixtures and HP. The materials were surrounded by thin fibrous connective tissues with a small number of lymphocytes and plasma cells. Severe inflammatory reactions were provoked by GC. Granulation tissues induced by CHP resembled those of pseudoxanthomatous granuloma. The GP material was encapsulated by relatively thick fibrous connective tissues with little inflammatory reactions.
authors.affiliation: Nihon University School of Dentistry.
authors.forename: A
authors.initials: A
authors.lastname: Sugawara
authors.forename: M
authors.initials: M
authors.lastname: Nishiyama
authors.forename: K
authors.initials: K
authors.lastname: Kusama
authors.forename: I
authors.initials: I
authors.lastname: Moro
authors.forename: S
authors.initials: S
authors.lastname: Nishimura
authors.forename: I
authors.initials: I
authors.lastname: Kudo
authors.forename: L C
authors.initials: LC
authors.lastname: Chow
authors.forename: S
authors.initials: S
authors.lastname: Takagi
mesh_terms: D000818:Animals; D002126:Calcium Hydroxide; D002130:Calcium Phosphates / Q000633:toxicity*; D003238:Connective Tissue / Q000187:drug effects; D003738:Dental Cements / Q000633:toxicity*; D017886:Durapatite; D006171:Gutta-Percha; D006882:Hydroxyapatites; D008422:Materials Testing; D051381:Rats; D011919:Rats, Inbred Strains; D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement
chemical_list: D002130:Calcium Phosphates; D003738:Dental Cements; D006882:Hydroxyapatites; D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; C045432:Grossman's sealer; D006171:Gutta-Percha; D017886:Durapatite; D002126:Calcium Hydroxide