Journal of Dentistry
Volume 34, Issue 10 , Pages 790-795, November 2006

The effect of alveolar bone loss on the load capability of restored endodontically treated teeth: A comparative in vitro study

  • Michael Naumann

      Affiliations

    • Department of Prosthodontics and Geriatric Dentistry, Charité, Humboldt University, Augustenburger Platz 1, D-13353 Berlin, Germany
    • Corresponding Author InformationCorresponding author. Tel.: +49 30 450 562 577; fax: +49 30 450 562 900.
    • ,
  • Martin Rosentritt

      Affiliations

    • Department of Prosthetic Dentistry, University Clinics, Regensburg, Germany
    • ,
  • Anja Preuß

      Affiliations

    • Department of Prosthodontics and Geriatric Dentistry, Charité, Humboldt University, Augustenburger Platz 1, D-13353 Berlin, Germany
    • ,
  • Thomas Dietrich

      Affiliations

    • Department of Health Policy and Health Services Research, Goldman School of Dental Medicine, Boston University, Boston, USA

Received 10 February 2006; received in revised form 5 March 2006; accepted 6 March 2006.

Abstract 

Objectives

The aim of the present investigation was to study the influence of a reduced bone support on the fracture resistance of endodontically treated teeth restored with glass fibre-reinforced posts (FRC).

Methods

30 caries-free maxillary central incisors were divided into 3 groups (n=10). Endodontic treatment was performed. Teeth were flattened 2mm above the cemento–enamel junction. Group I (control) simulated a clinical situation without horizontal bone loss. In group II a horizontal bone loss of 25% and in group III of 50% was simulated. All specimens received FRC posts and composite core restorations. All-ceramic crowns were adhesively cemented. Specimens were exposed to thermal cycling and mechanical loading (TCML) and finally statically loaded until failure in a universal testing machine (=1mm/min). Non-parametric tests were used to compare median fracture loads between groups. Fracture modes were compared using Fisher's exact test.

Results

The median fracture load values (min/max) in [N] were: group I=501 (326/561), group II=422 (323/495); group III=352 (266/406), p=0.004. Two specimens in each group II and III failed during TCML. Statistical analysis revealed statistically significant differences between all test groups regarding maximum fracture load and mode of fracture.

Conclusions

The fracture resistance of endodontically treated teeth restored adhesively with a FRC post, composite core, and all-ceramic crown is dependent on the level of surrounding supporting periodontal bone. Loss of alveolar bone loss due to periodontal disease may lead to an increased risk of failure.

Keywords: Fracture load, Post and core technique, Bone loss, Chewing simulation, Glass fibre-reinforced post

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PII: S0300-5712(06)00064-9

doi:10.1016/j.jdent.2006.03.003

Journal of Dentistry
Volume 34, Issue 10 , Pages 790-795, November 2006

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