{"created":"2021-03-01T06:30:56.983162+00:00","id":25475,"links":{},"metadata":{"_buckets":{"deposit":"40b528cf-8bab-409c-bfeb-3b6b243942a9"},"_deposit":{"id":"25475","owners":[],"pid":{"revision_id":0,"type":"depid","value":"25475"},"status":"published"},"_oai":{"id":"oai:niigata-u.repo.nii.ac.jp:00025475","sets":["432:1291:1292:1300","453:456"]},"item_7_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"ファイバーポストおよび鋳造ポストで修復した歯根の種類と荷重条件が破損強さと初期破損様式に及ぼす影響"}]},"item_7_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2009-06","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"1","bibliographicPageEnd":"24","bibliographicPageStart":"15","bibliographicVolumeNumber":"39","bibliographic_titles":[{"bibliographic_title":"新潟歯学会雑誌"},{"bibliographic_title":"新潟歯学会雑誌","bibliographic_titleLang":"en"}]}]},"item_7_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Objectives : This study investigated the influence of post type and loading condition on the failure resistance and primary failure mode of flared canal roots. Materials and methods : Flared post holes were prepared in 40 sound human lower premolar roots. Twenty roots received glass fiber posts with resin core (fiber specimens) and 20 received cast post-and-core (cast specimens). After cementation with resin cement, in 10 fiber and 10 cast specimens, a quasi-static bending test was performed by an Instron-type testing machine. In the other specimens, before the bending test, a bucco-lingual load was applied for 900,000 cycles using a lever-type device. Failure resistance and primary failure mode in relation with post type and loading condition were statistically analyzed (significance level: 0.05). Results : After cyclic loading, all specimens were intact; therefore, they underwent the bending test. Failure resistance showed a significant difference only for the post type (p = 0.002) (two-way ANOVA). In the presence of cyclic loading, the post type significantly influenced failure resistance (p = 0.010), whereas in its absence, it showed only a tendency to influence failure resistance (p = 0.054) (Tukey test). In the cycled specimens, significantly fewer root fractures and more frequent debonding without root fracture were found in the fiber than in the cast specimens (p = 0.02) (Fisher’s exact test). Conclusions : Rather than cast post-and-cores, the use of glass fiber-reinforced posts and resin core for the restoration of flared canal teeth may prevent root fracture, but debonding may occur under high loads.","subitem_description_type":"Abstract"},{"subitem_description":"本研究は漏斗状に窩洞形成された歯根の修復物における破損強さと初期の破損様式に、ポストの種類と荷重条件が及ぼす影響を検討した。漏斗状に根管形成した抜去下顎小臼歯40歯を用い、20歯にはガラスファイバーポストとコンポジットレジンコア (ファイバーポスト群)、残りの20歯には鋳造ポストと鋳造コア (鋳造ポスト群) で支台築造を作製し、レジンセメントで被験歯に合着した。各ポスト群10歯に、インストロン型万能試験機を用いてポスト－歯根複合体が破損するまで準静的曲げ試験を行った。残りの被験歯には、曲げ試験の前に、てこ型試験機を用いて2-kgfの頬舌的荷重を90万回加えた。反復荷重では全ての試料が破損しなかったので、引き続き準静的曲げ試験を行った。破損強さの測定値には二元配置分散分析法で、ポストの種類に有意差が認められた (p = 0.002) ものの、荷重条件要因および二要因間の交互作用には有意差が認められなかった。Tukey法の多重比較検定結果から、ポストの種類は反復荷重があると破損強さに有意差を示した (p = 0.010) が、反復荷重がないと影響する傾向を示したものの有意には達しなかった (p = 0.054)。破損様式に関しては、反復荷重を行った試料ではFisher's の直接確率計算法で分析すると、ファイバーポスト群が鋳造ポスト群よりも有意に歯根破折が少なく、歯根破折を伴わないポスト脱離が多かった (p = 0.020)。90万回作用させた疲労試験とそれに続く準静的曲げ試験の結果から、漏斗状に窩洞形成された歯根の修復物には、鋳造ポストよりもガラスファイバーポストとコア築成材料を用いる方が歯根破折を防ぐ可能性が示された。しかし、このガラスファイバーポストを用いた修復物には、大きな頬舌的荷重が作用すると偶発症として、ポスト脱離が高頻度に生じる可能性がある。","subitem_description_type":"Abstract"}]},"item_7_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"150193","nameIdentifierScheme":"WEKO"}],"names":[{"name":"岡田, 直人"}]},{"nameIdentifiers":[{"nameIdentifier":"150194","nameIdentifierScheme":"WEKO"}],"names":[{"name":"北村, 絵里子"}]},{"nameIdentifiers":[{"nameIdentifier":"150195","nameIdentifierScheme":"WEKO"}],"names":[{"name":"黒川, 孝一"}]},{"nameIdentifiers":[{"nameIdentifier":"150196","nameIdentifierScheme":"WEKO"}],"names":[{"name":"八木, 稔"}]},{"nameIdentifiers":[{"nameIdentifier":"150197","nameIdentifierScheme":"WEKO"}],"names":[{"name":"野村, 修一"}]}]},"item_7_publisher_7":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"新潟歯学会"}]},"item_7_select_19":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_select_item":"publisher"}]},"item_7_source_id_11":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN0018300X","subitem_source_identifier_type":"NCID"}]},"item_7_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"03850153","subitem_source_identifier_type":"ISSN"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Sharmin, Farhana"}],"nameIdentifiers":[{"nameIdentifier":"150186","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Stegaroiu, Roxana"}],"nameIdentifiers":[{"nameIdentifier":"150187","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Okada, Naoto"}],"nameIdentifiers":[{"nameIdentifier":"150188","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kitamura, Eriko"}],"nameIdentifiers":[{"nameIdentifier":"150189","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kurokawa, Kouichi"}],"nameIdentifiers":[{"nameIdentifier":"150190","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yagi, Minoru"}],"nameIdentifiers":[{"nameIdentifier":"150191","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Nomura, Shuichi"}],"nameIdentifiers":[{"nameIdentifier":"150192","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2019-08-19"}],"displaytype":"detail","filename":"NS_39(1)_15-24.pdf","filesize":[{"value":"1.1 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"NS_39(1)_15-24.pdf","url":"https://niigata-u.repo.nii.ac.jp/record/25475/files/NS_39(1)_15-24.pdf"},"version_id":"ba26a20d-1250-4f43-97bb-5bc794f972f5"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"cast post-and-core","subitem_subject_scheme":"Other"},{"subitem_subject":"failure mode","subitem_subject_scheme":"Other"},{"subitem_subject":"failure resistance","subitem_subject_scheme":"Other"},{"subitem_subject":"fiber-reinforced post","subitem_subject_scheme":"Other"},{"subitem_subject":"flared canal","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"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":"Effect of post type and loading condition on the failure resistance and primary failure mode of flared canal teeth restored with fiber-reinforced or cast posts","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Effect of post type and loading condition on the failure resistance and primary failure mode of flared canal teeth restored with fiber-reinforced or cast posts"},{"subitem_title":"Effect of post type and loading condition on the failure resistance and primary failure mode of flared canal teeth restored with fiber-reinforced or cast posts","subitem_title_language":"en"}]},"item_type_id":"7","owner":"1","path":["456","1300"],"pubdate":{"attribute_name":"公開日","attribute_value":"2015-01-21"},"publish_date":"2015-01-21","publish_status":"0","recid":"25475","relation_version_is_last":true,"title":["Effect of post type and loading condition on the failure resistance and primary failure mode of flared canal teeth restored with fiber-reinforced or cast posts"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-15T03:55:26.287144+00:00"}