Three-dimensional finite element analysis of zirconia all-ceramic cantilevered fixed partial dentures with different framework designs

Shoko Miura, Shin Kasahara, Shinobu Yamauchi, Hiroshi Egusa

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The purpose of this study were: to perform stress analyses using three-dimensional finite element analysis methods; to analyze the mechanical stress of different framework designs; and to investigate framework designs that will provide for the long-term stability of both cantilevered fixed partial dentures (FPDs) and abutment teeth. An analysis model was prepared for three units of cantilevered FPDs that assume a missing mandibular first molar. Four types of framework design (Design 1, basic type; Design 2, framework width expanded buccolingually by 2 mm; Design 3, framework height expanded by 0.5 mm to the occlusal surface side from the end abutment to the connector area; and Design 4, a combination of Designs 2 and 3) were created. Two types of framework material (yttrium-oxide partially stabilized zirconia and a high precious noble metal gold alloy) and two types of abutment material (dentin and brass) were used. In the framework designs, Design 1 exhibited the highest maximum principal stress value for both zirconia and gold alloy. In the abutment tooth, Design 3 exhibited the highest maximum principal stress value for all abutment teeth. In the present study, Design 4 (the design with expanded framework height and framework width) could contribute to preventing the concentration of stress and protecting abutment teeth.

Original languageEnglish
Pages (from-to)208-214
Number of pages7
JournalEuropean Journal of Oral Sciences
Volume125
Issue number3
DOIs
Publication statusPublished - 2017 Jun

Keywords

  • Y-TZP
  • fracture
  • gold alloy
  • modulus of elasticity
  • stress distribution

ASJC Scopus subject areas

  • Dentistry(all)

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