Effect of reinforcement with resin composite on fracture strength of structurally compromised roots

• FUKUI Yuji

  Fixed Prosthodontics, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University

• KOMADA Wataru

  Fixed Prosthodontics, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University

• YOSHIDA Keiichi

  Fixed Prosthodontics, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University

• OTAKE Shiho

  Fixed Prosthodontics, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University

• OKADA Daizo

  Fixed Prosthodontics, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University

• MIURA Hiroyuki

  Fixed Prosthodontics, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University

Abstract

This study was aimed at evaluating the fracture resistance of structurally compromised roots restored with four different post and core systems. Thirty-two bovine roots were uniformly shaped to simulate human mandibular premolar roots. The roots were divided into four groups based on the type of restoration: cemented cast post and core (Group MC), resin composite build-up (Group CR), resin composite and prefabricated glass fiber post build-up (Group FRC), and thick-layer dual-cured resin composite-reinforced small-diameter tapered cast post and core (Group CRM). After a static loading test, the failure mode and fracture resistance were recorded. Group CRM (719.38±196.73 N) exhibited a significantly high fracture resistance compared with the other groups (Group MC: 429.56±82.43 N; Group CR: 349.56±66.21 N; Group FRC: 398.94±112.71 N; p<0.05). In conclusion, Group CRM exhibited better mechanical properties for structurally compromised roots with no ferrules, although all types of restorations showed non-restorable fracture modes.

Journal

• Dental Materials Journal

  Dental Materials Journal 28 (5), 602-609, 2009

  The Japanese Society for Dental Materials and Devices

Keywords

• Fracture strength
• Glass fiber post
• Cast metal post

Details

• CRID: 1390282679692566272
• NII Article ID: 10025916738
• NII Book ID: AA10443149
• DOI: 10.4012/dmj.28.602
• COI: 1:STN:280:DC%2BD1Mnos1Skuw%3D%3D
• ISSN: 18811361
• ISSN: 02874547
• Web Site: https://www.jstage.jst.go.jp/article/dmj/28/5/28_5_602/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2010070733
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed