各種歯内療法用仮封材の封鎖性に関する研究  [in Japanese] A Comparative Study of Microleakage Characteristics of Six Endodontic Temporary Restorative Materials  [in Japanese]

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Author(s)

    • 韓 臨麟 HAN Rinrin
    • 新潟大学大学院医歯学総合研究科口腔健康科学講座う蝕学分野 Division of Cariology, Operative Dentistry and Endodontics, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences
    • 松井 香苗 MATSUI Kanae
    • 新潟大学大学院医歯学総合研究科口腔健康科学講座う蝕学分野 Division of Cariology, Operative Dentistry and Endodontics, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences
    • 岡本 明 OKAMOTO Akira
    • 新潟大学大学院医歯学総合研究科口腔健康科学講座う蝕学分野 Division of Cariology, Operative Dentistry and Endodontics, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences
    • 興地 隆史 OKIJI Takashi
    • 新潟大学大学院医歯学総合研究科口腔健康科学講座う蝕学分野 Division of Cariology, Operative Dentistry and Endodontics, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences

Abstract

歯内療法用仮封材には,複雑な口腔環境下で確実な封鎖性を維持することが求められる.本研究では,水硬性仮封材(キャビトン®,ジーシー;キャビット®,3M ESPE;およびハイシール®,松風),酸化亜鉛ユージノールセメント(ネオダイン®,ネオ製薬),酸化亜鉛ユージノール系ハイブリッド仮封材(ユージマー®,日本歯科薬品)および酸化亜鉛非ユージノールセメント(キャンシール®,昭和薬品化工)を被験材料とし,これらの封鎖性をサーマルサイクリングあるいは繰り返し荷重負荷の条件下で評価した.さらに,水酸化カルシウム製剤およびホルマリンクレゾール(以下,FC)を貼薬剤として用いた場合に,仮封材の封鎖性が相違するか否かについても検討を加えた.180本のヒト抜去大臼歯に髄腔開拡後,水酸化カルシウム製剤(カルシペックスII®,日本歯科薬品)もしくはFC(歯科用ホルムクレゾール「村上」®,アグサ)を貼薬した後,各被験材料で仮封を行った.これらの試片を蒸留水中に37℃,6日間浸漬保管した後,条件A(0.2%フクシン溶液12時間浸漬),条件B(サーマルサイクリング後0.2%フクシン溶液浸漬),条件C(サーマルサイクリング後,0.2%フクシン溶液浴下繰り返し荷重負荷)の3条件で色素浸透試験を行った(各n=5).次いで各試片を頬舌側方向に縦断後,仮封材と窩壁の間に生じた色素浸透を実体顕微鏡にて観察し,4段階のスコアを与えた.得られたデータについて,分散分析(Kruskal-Wallis検定)と多重比較検定(Dunn検定)を用いて5%の有意水準で統計解析を行った.その結果,浸漬のみ,およびサーマルサイクリング負荷の条件では,ネオダイン®がキャンシール®,ハイシール®,ユージマー®と比べて有意に著しい色素浸透を示した.また,サーマルサイクリング後繰り返し荷重負荷の条件ではネオダイン®,キャンシール®がハイシール®と比較して有意に著しい色素浸透を示した.カルシペックスII®とFCを根管貼薬剤とした場合,色素浸透に差はみられなかった.以上より,本実験条件下ではハイシール®が最も良好な封鎖性を示すことが示唆された.

Temporary restorative materials for endodontic treatments should maintain a harmetic seal in the complex environment of the oral cavity. The purpose of this study was to compare the sealing ability of three calcium sulfate-based hydraulic temporary restorative materials (Cavit®, 3M ESPE; Caviton®, GC; and HY-Seal®, Shofu), a zinc oxide eugenol cement (Neodyne®, Neo Dental), a polymer-containing zinc oxide eugenol-based temporary restorative material (Eugemer®, Nihon Shika Yakuhin), and a zinc oxide non-eugenol cement (Canseal®, Showa Yakuhin Kako). The effect of intracanal medicaments on the sealing ability was also studied. Access cavities were prepared in extracted intact human molars (n=180), dressed with either a calcium hydroxide preparation (Calcipex II®, Nihon Shika Yakuhin) or FC (Formocresol "Murakami®", Agusa) and then restored with one of the six endodontic temporary restorative materials. The specimens were stored in distilled water for six days and then subjected to dye penetration tests under one of the three conditions (n=5, each):(A) immersion in 0.2% fuchsin solution; (B) thermal cycling followed by the dye immersion; and (C) thermal cycling followed by mechanical load cycling in the dye solution. Specimens were then sectioned buccolingually and the degree of dye penetration along the cavity wallmaterial interface was assessed using a stereomicroscope. Grading of the microleakage pattern was from 0 to 3, with 3 providing the worst seal. Data were statistically analyzed using Kruskal-Wallis ANOVA and multiple comparisons using the Dunn test (p<0.05). Under conditions (A) and (B), Neodyne® showed significantly higher degree of dye penetration compared with Canseal®, HY-Seal®, and Eugemer®. Under condition (C), however, Neodyne® and Canseal® showed significantly higher degree of dye penetration compared with HY-Seal®. No differences were detected between calcium hydroxide- and formocresol-dressed specimens. Within the limitation of the study, it can be concluded that HY-Seal® exhibited the best seal amongst the six materials tested.

Journal

  • The Japanese Journal of Conservative Dentistry

    The Japanese Journal of Conservative Dentistry 51(3), 274-280, 2008

    The Japanese Society of Conservative Dentistry

References:  27

Cited by:  1

Codes

  • NII Article ID (NAID)
    110007151244
  • NII NACSIS-CAT ID (NCID)
    AN00191201
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0387-2343
  • Data Source
    CJP  CJPref  NII-ELS  J-STAGE 
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