Influence of attaching mechanical retentive devices onto frameworks on fracture resistance of implant-supported zirconia crowns

Tatsuro Kobayashi, Junichi Honda, Kei Kubochi, Taro Iwasaki, Yusuke Watanabe, Futoshi Komine

Research output: Contribution to journalArticlepeer-review

Abstract

This study investigated the fracture load of implant-supported zirconia crowns (IZCs), in which indirect composite resin or feldspathic porcelain was layered onto zirconia frameworks with mechanical retentive devices. Three different zirconia frameworks were assessed: attaching mechanical retentive devices on glaze and opaque porcelain materials (GL and OP groups, respectively), and no attaching mechanical retentive devices (ND group). The frameworks were layered using feldspathic porcelain (FP veneer) and indirect composite resin (IC veneer). Fracture load of the specimens was measured. In FP veneer, the GL group recorded the highest fracture load. In the IC veneer, the GL and OP groups had significantly higher fracture load than the ND group. The fracture resistance of IZCs can be enhanced by applying glaze material before attaching mechanical retentive devices for porcelain layering. The mechanical retentive devices effectively yielded mechanical interlocking between the zirconia frameworks and the IC veneer in GL and OP groups.

Original languageEnglish
Pages (from-to)359-366
Number of pages8
JournalDental Materials Journal
Volume43
Issue number3
DOIs
Publication statusPublished - 2024

Keywords

  • Fracture load
  • Implant-supported zirconia crowns
  • Layering material
  • Mechanical retentive devices

Fingerprint

Dive into the research topics of 'Influence of attaching mechanical retentive devices onto frameworks on fracture resistance of implant-supported zirconia crowns'. Together they form a unique fingerprint.

Cite this