{"created":"2023-07-27T04:41:16.890876+00:00","id":23560,"links":{},"metadata":{"_buckets":{"deposit":"c8fd84fd-4ffb-496b-8ca4-a4337e61b81a"},"_deposit":{"created_by":3,"id":"23560","owners":[3],"pid":{"revision_id":0,"type":"depid","value":"23560"},"status":"published"},"_oai":{"id":"oai:tohoku.repo.nii.ac.jp:00023560","sets":["89:178"]},"author_link":["57002","57004","56996","56997","57005","56999","57001","56998","57003","57000"],"item_4_alternative_title_20":{"attribute_name":"その他の言語のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Effect of additives on the setting properties of biocompatiblecalcium phosphate cements"}]},"item_4_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1997-06","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"1","bibliographicPageEnd":"61","bibliographicPageStart":"54","bibliographicVolumeNumber":"16","bibliographic_titles":[{"bibliographic_title":"東北大学歯学雑誌"}]}]},"item_4_date_62":{"attribute_name":"登録日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2008-05-02","subitem_date_issued_type":"Created"}]},"item_4_date_63":{"attribute_name":"公開日（投稿完了日）","attribute_value_mlt":[{"subitem_date_issued_datetime":"2008-05-02","subitem_date_issued_type":"Created"}]},"item_4_date_65":{"attribute_name":"発行日","attribute_value_mlt":[{"subitem_date_issued_datetime":"1997-06","subitem_date_issued_type":"Created"}]},"item_4_date_80":{"attribute_name":"更新日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2010-01-27","subitem_date_issued_type":"Created"}]},"item_4_description_15":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_4_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"CPC(calcium phosphate cement)は, 生体温度において湿潤した環境下で自己硬化する生体親和性に優れたセメントである。そのため, 硬組織代替材, 根管充填材, 知覚過敏症防止剤, 歯髄覆車材などへの応用等が検討されている。今回, CPCを歯冠補綴物の合着用として応用する可能性を探るため, CPCに各種添加剤を加え, 従来の合着用セメントと同様の操作性を得られたものについて, 圧裂強度を測定した.用いたCPC粉末は, TTCP72.6wt%, DCPA27.4wt%の混合物, 練和液は分子量24万のポリアクリル酸25wt%水溶液(硬化促進剤, 以下25wt%poly(acrylicacid))を用いた。添加物としてIDAA, MIDAA, HEIDAA, Mg(OH)_2,MgO(いずれも硬化抑制剤)を用い, 粉液比2 : 1とした場合, 従来の合着用セメントに類似した操作性と操作時間を得ることができた。圧裂強度試験は, 直径6mm, 厚さ3mmの円盤状試料を用い, 圧縮速度10mm/min.で行った。測定は試料を37℃蒸留水に24時間保存後行った。なお, 水のみを用いて練和したもの(P/L : 4), 硬化抑制剤無添加の25wt%poly(acrylicacid)および市販の合着用セメントも比較として測定した。また, それぞれの液成分のpHも測定した。圧裂試験の結果, 25wt%poly(acrylicacid)を用いて練和した試料の圧裂強度は, 添加物の有無に関わらずいずれも5～6MPaであり, 市販の合着用グラスアイオノマーセメント(約10MPa)より小さな値であった。一方, CPCを純水で練和したもの(P/L=4)は約9MPaであり, CPC自体の強度は従来の合着用セメントに匹敵する強度を持つことがわかった。また, 25wt%poly(acrylicacid)のpHは, 現在一般に使用されている合着用セメントに比べ, 大きな値であった。今後, 本セメントを合着用として開発するためには, 強度を低下させず, しかもより優れた操作性を与える, 適切な添加剤について検討を加え, 更なる改良が必要である。","subitem_description_type":"Abstract"},{"subitem_description":"Calcium phosphates are suitable as biomaterials because of their high biocompatibility. Calcium phosphate cements (CPO have self-setting properties and form a hydroxyapatite cement when exposed to aqueous conditions and a temperature of 37℃. A cement with these properties can potentially be used in a wide range of dental a pplications. In this study of CPC, for dental luting applications, the effects of additives on the setting behavior and diametral tensile strength (DTS) of polymeric CPC derived from a high molecular weight polyacrylic acid (PAA) and CPC powder was examined. The pH of the liquid was also measured. The PAA powder consisted of 72.6% tetracalcium phosphate and 27.4% dicalcium phosphate anhydrous on a weight basis. One part of the polyacid was mixed with two parts of the CPC powder for a powder/1iquid ratio of 2 (wt/wt) . The cement components were mixed at 23℃ and 50% relative humidity for 45 sec. The additives used to control setting were Mg(OH)_2,iminodiacetic acid (IDAA), methyliminodiacetic acid (MIDAA) , and hydroxyethyliminodiacetic acid (HEIDAA) . With the additives the workability of the cement paste was similar to that of conventional luting cements. Mean DTS (n=6) in Mpa of this PAA-CPC after 24 hours in 37℃ H.O was 5.77 (S.D.= 0.47). Cements with small arnounts (4-6%) of additives had excellent handling properties and clinically acceptable setting times (2-8 min). Their mean DTS (n=6) values were : 4.62 (0.55) Mg(OH)_2; 6.27 (0.44), IDAA ; 5.18 (0.85), MIDAA and 6.41 (0.58) Mpa, HEIDAA, respectively. There were no significant differences (p<0.05) among the DTS values of the unmodified and modified PAA-CPCs except for the Mg(OH), cements ; however the additives did improve the workability and handling properties of the fast-setting PAA-CPC. The results suggest that these additives to PAA-CPCs can improve workability and handling, without significant loss of strength. The pH value of PAA liquid is higher than those of conventional dental luting cements.","subitem_description_type":"Abstract"}]},"item_4_description_41":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"subitem_description":"紀要類(bulletin)","subitem_description_type":"Other"}]},"item_4_description_66":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"558812 bytes","subitem_description_type":"Other"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"57001","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Kasahara, Shin"}]},{"nameIdentifiers":[{"nameIdentifier":"57002","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Kimura, Kohei"}]},{"nameIdentifiers":[{"nameIdentifier":"57003","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Saito, Hirota"}]},{"nameIdentifiers":[{"nameIdentifier":"57004","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Hosotani, Makoto"}]},{"nameIdentifiers":[{"nameIdentifier":"57005","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Hatakeyama, Noriko"}]}]},"item_4_publisher_34":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東北大学歯学会"}]},"item_4_radio_69":{"attribute_name":"公開範囲","attribute_value_mlt":[{"subitem_radio_item":"学外"}]},"item_4_source_id_7":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"02873915","subitem_source_identifier_type":"ISSN"}]},"item_4_source_id_9":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00081101","subitem_source_identifier_type":"NCID"}]},"item_4_version_type_16":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"笠原, 紳"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"木村, 幸平"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"齊藤, 裕太"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"細谷, 誠"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"畠山, 憲子"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-02-10"}],"displaytype":"detail","filename":"KJ00000093632.pdf","filesize":[{"value":"558.8 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"KJ00000093632.pdf","url":"https://tohoku.repo.nii.ac.jp/record/23560/files/KJ00000093632.pdf"},"version_id":"27c4b9db-40cc-4207-8ff5-2e60e2348eff"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"calcium phosphate cements","subitem_subject_scheme":"Other"},{"subitem_subject":"additive","subitem_subject_scheme":"Other"},{"subitem_subject":"setting properties","subitem_subject_scheme":"Other"},{"subitem_subject":"diametral tensile strength","subitem_subject_scheme":"Other"},{"subitem_subject":"pH of cement liquids","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"生体親和性セメントCPC(calcium phosphate cement)の硬化に与える各種添加物の影響","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"生体親和性セメントCPC(calcium phosphate cement)の硬化に与える各種添加物の影響"}]},"item_type_id":"4","owner":"3","path":["178"],"pubdate":{"attribute_name":"公開日","attribute_value":"2008-05-02"},"publish_date":"2008-05-02","publish_status":"0","recid":"23560","relation_version_is_last":true,"title":["生体親和性セメントCPC(calcium phosphate cement)の硬化に与える各種添加物の影響"],"weko_creator_id":"3","weko_shared_id":3},"updated":"2023-07-27T15:38:39.138445+00:00"}