Load-bearing capacity of lithium disilicate and ultra-translucent zirconias

Journal of the Mechanical Behavior of Biomedical Materials
Jing YanYu Zhang

Abstract

The aim of this study was to evaluate the load-bearing capacity of monolithic lithium disilicate (LiDi - IPS e.max CAD) and novel ultra-translucent zirconia restorative systems of various compositions: 5Y-PSZ (5 mol% yttria-partially-stabilized zirconia) and 4Y-PSZ (4 mol% yttria-partially-stabilized zirconia); relative to a 3Y-TZP (3 mol% yttria-stabilized zirconia) control. Experiments were carried out with 10 disc specimens (Ø12 ×1 mm) per ceramic material. The zirconia intaglio surface (as machined) was sandblasted (50 µm Al2O3 at 2 bar), while LiDi was etched with 5% HF for 20 s. The ceramic discs were then adhesively bonded onto a dentin-like substrate (G10, a high-pressure fiberglass material) using Multilink Automix cement and Monobond Plus primer, producing a ceramic/cement/dentin-like substrate trilayer structure. The bonded specimens were stored in water for 3 days at 37 °C prior to a Hertzian indentation flexural radial fracture test. The plate-on-foundation theory was used to validate the load-bearing capacity of the trilayer systems based on the flexural tensile stress at the ceramic intaglio (cementation) surface-a cause for bulk fracture of ceramic onlays. The experiment data showed that, when bonded to and supp...Continue Reading

Citations

May 31, 2019·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Nathaniel C LawsonDaniel A Givan
Feb 13, 2019·Journal of Dental Research·M R KaizerY Zhang
Sep 18, 2020·Biomaterial Investigations in Dentistry·Cathrine Å KarlsenMarit Øilo
Feb 6, 2021·Dental Materials : Official Publication of the Academy of Dental Materials·Renan V MachryLuiz Felipe Valandro
Mar 16, 2021·Dental Materials : Official Publication of the Academy of Dental Materials·Julio Nogueira LuzYu Zhang
Nov 16, 2019·Dental Materials : Official Publication of the Academy of Dental Materials·Fei ZhangJérôme Chevalier
Jun 1, 2020·Dental Materials : Official Publication of the Academy of Dental Materials·Beata Dejak, Andrzej Młotkowski
Sep 23, 2020·Dental Materials : Official Publication of the Academy of Dental Materials·Sonaj VardhamanYu Zhang
Jun 29, 2021·Journal of Prosthodontic Research·María Fernanda Solá-RuízRubén Agustín-Panadero
Aug 1, 2021·Dental Materials : Official Publication of the Academy of Dental Materials·Marit ØiloKetil Kvam
Aug 28, 2021·Clinical Oral Investigations·Isabelle Helena Gurgel de CarvalhoRodrigo Othávio de Assunção E Souza

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