Fracture Resistance of Zirconia-Reinforced Lithium Silicate Ceramic Crowns Cemented with Conventional or Adhesive Systems: An In Vitro Study.

D'Addazio, Gianmaria; Santilli, Manlio; Rollo, Marco Lorenzo; Cardelli, Paolo; Rexhepi, Imena; Murmura, Giovanna; Al-Haj Husain, Nadin; Sinjari, Bruna; Traini, Tonino; Özcan, Mutlu; Caputi, Sergio (2020). Fracture Resistance of Zirconia-Reinforced Lithium Silicate Ceramic Crowns Cemented with Conventional or Adhesive Systems: An In Vitro Study. Materials, 13(9) MDPI 10.3390/ma13092012

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In recent years, Zirconia-reinforced Lithium Silicate ceramic (ZLS), combining lithium-silicate and zirconia features, has shown to have excellent mechanical and aesthetic characteristics. Thus, the aim of this study was to compare the fracture strength of ZLS single crowns cemented with two different cementation techniques. Twenty crowns were realised and cemented on teeth replicas achieved from an extracted premolar human tooth. The samples were divided into two groups of 10 specimens each, Glass-ionomeric cement (GIC) group and Self-Adhesive Resin Cement (ARC) group. The mechanical test was performed using a universal testing machine. The specimens were then evaluated with a scanning electron microscope (SEM) to identify for all crowns and related abutments the pattern of fracture after the breaking point. The data obtained were statistically analysed. The mean fracture toughness values and standard deviations (±SD) were 2227 ± 382 N and 3712 ± 319 N respectively for GIC and ARC groups. In fact, t-test showed a statistically significant difference between the two groups (p < 0.001). Moreover, the SEM results demonstrated portions of abutments still attached to the crown fragments in the ARC group, whilst these were not present in the GIC group. Within the limitations of this study, these results suggest the use of adhesive cementation for ZLS crowns, which significantly increase the compressive strength of ZLS restorations compared to GIC.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > School of Dental Medicine > Department of Reconstructive Dentistry and Gerodontology

UniBE Contributor:

Al-Haj Husain, Nadin

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1996-1944

Publisher:

MDPI

Language:

English

Submitter:

Tina Lauper

Date Deposited:

03 Sep 2020 15:58

Last Modified:

07 Aug 2024 15:45

Publisher DOI:

10.3390/ma13092012

PubMed ID:

32344894

Uncontrolled Keywords:

Zirconia-reinforced lithium silicate adhesive dentistry cementation fracture resistance in vitro studies prosthetic dentistry

BORIS DOI:

10.7892/boris.146289

URI:

https://boris.unibe.ch/id/eprint/146289

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