title: Production of a calcium silicate cement material from alginate impression material.
abstract: The purpose of this study was to synthesize biomaterials from daily dental waste. Since alginate impression material contains silica and calcium salts, we aimed to synthesize calcium silicate cement from alginate impression material. Gypsum-based investment material was also investigated as control. X-ray diffraction analyses revealed that although firing the set gypsum-based and modified investment materials at 1,200°C produced calcium silicates, firing the set alginate impression material did not. However, we succeeded when firing the set blend of pre-fired set alginate impression material and gypsum at 1,200°C. SEM observations of the powder revealed that the featured porous structures of diatomite as an alginate impression material component appeared useful for synthesizing calcium silicates. Experimentally fabricated calcium silicate powder was successfully mixed with phosphoric acid solution and set by depositing the brushite. Therefore, we conclude that the production of calcium silicate cement material is possible from waste alginate impression material.
authors.affiliation: Department of Oral Biomaterials and Technology, Showa University School of Dentistry, Tokyo, Japan.
authors.forename: Norimasa
authors.initials: N
authors.lastname: Washizawa
authors.forename: Hideaki
authors.initials: H
authors.lastname: Narusawa
authors.forename: Yukimichi
authors.initials: Y
authors.lastname: Tamaki
authors.forename: Takashi
authors.initials: T
authors.lastname: Miyazaki
mesh_terms: D000464:Alginates / Q000737:chemistry; D017610:Calcium Compounds / Q000138:chemical synthesis*; D002133:Calcium Sulfate / Q000737:chemistry; D003734:Dental Casting Investment / Q000737:chemistry; D003760:Dental Impression Materials / Q000737:chemistry*; D018057:Dental Waste; D007692:Diatomaceous Earth / Q000737:chemistry; D055772:Green Chemistry Technology; D011208:Powders; D012823:Silicate Cement / Q000138:chemical synthesis*; D017640:Silicates / Q000138:chemical synthesis*; D014961:X-Ray Diffraction
chemical_list: D000464:Alginates; D017610:Calcium Compounds; D003734:Dental Casting Investment; D003760:Dental Impression Materials; D018057:Dental Waste; D011208:Powders; D017640:Silicates; D012823:Silicate Cement; D007692:Diatomaceous Earth; C033787:diatomite; C031293:calcium silicate; D002133:Calcium Sulfate