{"created":"2021-03-01T06:31:09.559261+00:00","id":25661,"links":{},"metadata":{"_buckets":{"deposit":"5ad1cf8c-8e42-49f0-933a-9838cc6bb442"},"_deposit":{"id":"25661","owners":[],"pid":{"revision_id":0,"type":"depid","value":"25661"},"status":"published"},"_oai":{"id":"oai:niigata-u.repo.nii.ac.jp:00025661","sets":["432:1291:1292:1311","453:456"]},"item_7_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Study on color masking effect of porcelain laminate veneers for severely discolored teeth"}]},"item_7_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2003-12","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"2","bibliographicPageEnd":"76","bibliographicPageStart":"69","bibliographicVolumeNumber":"33","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":"It is difficult to improve the severe discoloration such as Tetracycline staining by using commercially available porcelain laminate veneer systems. Especially, as enamel reduction is limited to 0.3mm or less at cervical area, the porcelain laminate veneer thickness surpass the acceptable range of 0.6mm to get a complete masking effect of the background discoloration. This study was performed to clarify the masking ability of masking porcelain (MP) contained in a porcelain laminate veneer laboratory system and the combined effect of MP and an opaque porcelain (OP) from a porcelain fused to metal restoration system to make thinner porcelain laminate veneers with a desirable color reproduction. The test porcelain plates (1cm×1cm) with the range of 0.15～ 0.8mm in thickness were divided into four groups, as follows MP single layer, OP single layer, OP/MP double layers and OP+MP mixture with various ratio. The minimum thickness to obtain complete masking effect in each group was evaluated using an illuminometer. As a result, the minimum thickness was 0.8mm for MP single layer group, 0.2mm for OP single layer group, 0.35mm for OP/MP double layer group and 0.3mm for OP+MP mixture group. Moreover, the dentin porcelain of VITA shade A3 (A3DP) was built-up with the thickness of 0.3mm on each plate of minimum thickness. The reproduction of A3 shade was evaluated with a dental color meter. The following three conditions, 0.2mm of A3.5OP, 0.3mm of 50%A3OP+50%A3MP mixture and 0.3mm of 50%A3.5OP+50%A3MP mixture, showed the closest color value to VITA shade A3. It is concluded that in the porcelain laminate veneer for severely discolored teeth OP or OP+MP mixture should be applied at the cervical area to obtain better color reproduction and a proper tooth contour.","subitem_description_type":"Abstract"},{"subitem_description":"テトラサイクリン変色のような重度変色歯に対して、市販のポーセレンラミネートベニアシステムで色調を改善するのは困難である。特に歯頸部においては、エナメル質の削除量が0.3mm程度に制限されるため、確実な色調遮蔽を求めるとポーセレンベニアは許容範囲の0.6mm以上の厚さとなり、過豊隆(オーバーカウントゥア)になりやすい｡本研究では、ポーセレンラミネートベニアシステムに付属のマスキングポーセレン(MP)を用いて、確実に色調遮蔽できる最小限の厚さを明確にした｡次いで陶材焼付鋳造冠用のオペークポーセレン(OP)を併用することで、厚さが可及的に薄く、色調遮蔽性が十分で、色調再現性が良好なポーセレンベニアの製作について検討した。まず、MP単層、OP単層、OP/MP積層およびOP+MP混合の各条件で、0.15～0.8mmの範囲の厚さで試験プレートを作製し、色調遮蔽ができる最小厚さを求めた｡その結果、MP単層群で0.8mm、OP単層群で0.2mm、OP/MP積層群で0.35mmおよびOP+MP混合群で0.3mmであった｡さらに、それらの各条件で、A3デンチンポーセレン(A3DP)をその上に0.3mm築盛して、色調再現性を歯科用色彩計で測定した｡その結果A3.5OP0.2mm、50%A3OP+50%A3MP混合0.3mmおよび50%A3.5OP+50%A3MP混合0.3mmの3つの条件がVITAシェードガイドのA3に、最も近似した値を示した｡以上のことから、重度変色歯に対して、市販のポーセレンラミネートベニアシステムを使用する場合には、歯頚部付近では、OPを単独使用またはOPとMPを混合した方がより薄い層で変色を遮蔽することができ、色調の再現性も良好で、過豊隆の防止に有効であることが明らかになった｡","subitem_description_type":"Abstract"}]},"item_7_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"151247","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Okada, Naoto"}]},{"nameIdentifiers":[{"nameIdentifier":"151248","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Fukushima, Masayoshi"}]},{"nameIdentifiers":[{"nameIdentifier":"151249","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Watanabe, Kiyoshi"}]},{"nameIdentifiers":[{"nameIdentifier":"151250","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Tobita, Shigeru"}]}]},"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":"岡田, 直人"}],"nameIdentifiers":[{"nameIdentifier":"151243","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"福島, 正義"}],"nameIdentifiers":[{"nameIdentifier":"151244","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"渡邉, 清志"}],"nameIdentifiers":[{"nameIdentifier":"151245","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"飛田, 滋"}],"nameIdentifiers":[{"nameIdentifier":"151246","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_33(2)_69-76.pdf","filesize":[{"value":"3.4 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"NS_33(2)_69-76.pdf","url":"https://niigata-u.repo.nii.ac.jp/record/25661/files/NS_33(2)_69-76.pdf"},"version_id":"dbc8e113-cd71-44a0-9cab-14f3b9e83c50"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"ポーセレンラミネートべニア","subitem_subject_scheme":"Other"},{"subitem_subject":"変色歯","subitem_subject_scheme":"Other"},{"subitem_subject":"マスキングポーセレン","subitem_subject_scheme":"Other"},{"subitem_subject":"オペークポーセレン","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":"重度変色歯に対するポーセレンラミネートべニアの色調遮蔽性に関する研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"重度変色歯に対するポーセレンラミネートべニアの色調遮蔽性に関する研究"},{"subitem_title":"重度変色歯に対するポーセレンラミネートべニアの色調遮蔽性に関する研究","subitem_title_language":"en"}]},"item_type_id":"7","owner":"1","path":["456","1311"],"pubdate":{"attribute_name":"公開日","attribute_value":"2013-08-27"},"publish_date":"2013-08-27","publish_status":"0","recid":"25661","relation_version_is_last":true,"title":["重度変色歯に対するポーセレンラミネートべニアの色調遮蔽性に関する研究"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-15T03:55:40.160440+00:00"}