Post and Core for Obtaining a Good Prognosis for Endodontically Treated Teeth

• Kawasaki Takao

  Field of Removable Prosthodontics, Department of Oral Functional Sciences, Division of Oral Medicine, Hokkaido University Postgraduate School of Dental Sciences

• Takayama Yoshiyuki

  Field of Removable Prosthodontics, Department of Oral Functional Sciences, Division of Oral Medicine, Hokkaido University Postgraduate School of Dental Sciences

Bibliographic Information

Other Title

• 無髄歯の予後を良好にするための築造体とは

Abstract

It is well known that endodontically treated teeth are easily broken. However, countermeasures have not been established, and there are cases where the resin core is recommended or the reinforcement of the root canal by the cast core is recommended.<BR>Purpose: This paper examines therapies for protecting endodontically treated teeth.<BR>Study selection: We selected in vitro studies from 1997 to 2002 and in vivo studies. We used threedimensional finite element analysis to analyze the force distribution in posts and cores. For the analysis, we prepared three types of Young's modulus of periodontal ligament, anterior tooth and premolar.<BR>Results: There was little equivalence with the organism in most research. The reports, however, suggested that the fracture strength of the whole system decreases with increasing elasticity of the post. A comparison of the resin core and cast metal core did not show which was the more useful.<BR>Conclusions: Although there have been few papers describing opinions based on scientific reasoning, the following conclusions were drawn. 1. There is no basis for claiming whether a metal or resin core is excellent. 2. Selected application is not required in a cast core or resin core, because there is no difference at the Young's modulus between a cast post and prefabricated metal post. 3. A tapered cast post and core may cause tooth fracture. The bulk of dentin is important for the strength of endodontically treated teeth.

Journal

• Nihon Hotetsu Shika Gakkai Zasshi

  Nihon Hotetsu Shika Gakkai Zasshi 47 (2), 244-252, 2003

  Japan Prosthodontic Society

Keywords

• tooth fracture
• posts and cores
• cast metal core and resin core
• three-dimensional finite element analysis
• literature review

Details

• CRID: 1390001204413234048
• NII Article ID: 10010529193
• NII Book ID: AN00197911
• DOI: 10.2186/jjps.47.244
• ISSN: 1883177X
• ISSN: 03895386
• Web Site: http://www.jstage.jst.go.jp/article/jjps1957/47/2/47_2_244/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2004066005
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed