Disinfection of Impressions in Dental Treatment for Elderly Patients at Home : Effect of W/P Ratio of Alginate Impression Materials on the Dimensional Accuracy and Deformation of Stone Models

DOI 13 Citations 22 References
  • HIRAGUCHI Hisako
    Laboratory of Dental Materials Research and Division of Biomaterials Science, Dental Research center, Nihon University School of Dentistry
  • NAKAGAWA Hisami
    Laboratory of Dental Materials Research and Division of Biomaterials Science, Dental Research center, Nihon University School of Dentistry
  • UCHIDA Hirobumi
    Laboratory of Dental Materials Research and Division of Biomaterials Science, Dental Research center, Nihon University School of Dentistry
  • TANABE Naoki
    Laboratory of Dental Materials Research and Division of Biomaterials Science, Dental Research center, Nihon University School of Dentistry

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  • 高齢者への訪問歯科診療における印象の消毒処理方法に関する研究 : アルジネート印象材の混水比が模型の寸法精度および変形に及ぼす影響

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As part of our study about the disinfection of impressions in dental treatment of elderly patients at home, the present study investigated the effect of immersion disinfection of alginate impressions on the dimensional accuracy and deformation of edentulous working casts in relation to the W/P ratio of alginate impression materials. Two types of alginate impression material : AROMA FINE DF III (AF III) and Jeltrate Plus (JLP), characterized by smaller or greater dimensional changes in water, were used. Impression materials were mixed at the following W/P ratio : manufacturers' instructions (std), std-0.2, and std+0.4. Impressions were immersed in 1% sodium hypochlorite solution for 10 min (1 SH), 2% glutaraldehyde solution for 30 min (2 GA), or they were not immersed in any disinfectant solutions as a control. The W/P ratio had no effect on the dimensional accuracy and deformation of edentulous working casts obtained from AF III impression disinfected by 1 SH processing.

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