歯根部歯質の残存量が支台築造した歯の破壊強度に及ぼす影響 : 天然歯による予備的検討  [in Japanese] Study of the lnfluence of the Remaining Radicular Tooth Structure on the Fracture Resistance of Pulpless Teeth : Preliminary Examination Using a Natural Teeth  [in Japanese]

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Author(s)

    • 長田 貴幸 OSADA Takayuki
    • 昭和大学歯学部第一歯科補綴学教室 The First Department of Fixed Prosthodontics, Showa University School of Dentistry
    • 割田 研司 WARITA Kenji
    • 昭和大学歯学部第一歯科補綴学教室 The First Department of Fixed Prosthodontics, Showa University School of Dentistry
    • 川和 忠治 KAWAWA Tadaharu
    • 昭和大学歯学部第一歯科補綴学教室 The First Department of Fixed Prosthodontics, Showa University School of Dentistry

Abstract

The aim of this study was to investigate the influence of post-core methods and the remaining radicular tooth structure on the fracture resistance of pulpless teeth. Two types of remaining radicular tooth structure were tested: one group had sufficient radicular tooth structure, and the second had thinwalled-flared canals. The prepared post holes were restored with one of five different post-core methods: the metal post and cores cemented with zinc-phosphate cement; the metal post and cores cemented with Super-Bond C & B; C-POST and composite resin core; AD POST II and composite resin core, and composite resin only. Each group was tested until the root fractured with a slowly increasing force at 90 degrees to the long axis.<BR>The results were as follows:<BR>1. The use of a metal post and cores resulted in higher fracture resistance than those recorded for teeth restored with composite resin.<BR>2. Fracture resistance of teeth restored with a metal post and cores decreased with decreasing radicular tooth structure; nevertheless, there was no significant difference.<BR>3. A composite resin post and cores could be used for the restoration of thin-walled-flared canals.<BR>4. Fractures were detected at the core-dentin interface in all specimens; therefore, core-dentin interfaces must be strengthened.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 44(6), 757-767, 2000-12-10

    Japan Prosthodontic Society

References:  42

Cited by:  6

Codes

  • NII Article ID (NAID)
    10008156539
  • NII NACSIS-CAT ID (NCID)
    AN00197911
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03895386
  • Data Source
    CJP  CJPref  J-STAGE 
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