Effect of cements on fracture resistance of monolithic zirconia crowns. Issue 1 (19th December 2016)

• Record Type: Journal Article
• Authors: Nakamura, Keisuke; Mouhat, Mathieu; Nergård, John Magnus; Lægreid, Solveig Jenssen; Kanno, Taro; Milleding, Percy; Örtengren, Ulf
• Is Part Of: Acta biomaterialia odontologica Scandinavica. Volume 2:Issue 1(2016)
• Page Start: 12
• Page End: 19
• Publication Date: 2016-12-19
• Subjects: Monolithic zirconia crowns -- fracture resistance -- zinc phosphate cement -- glass-ionomer cement -- resin-based cement
• DOI: 10.3109/23337931.2015.1129908
• Languages: English
• ISSNs: 2333-7931

Abstract

Abstract: Objectives The present study investigated the effect of cements on fracture resistance of monolithic zirconia crowns in relation to their compressive strength. Materials and methods Four different cements were tested: zinc phosphate cement (ZPC), glass-ionomer cement (GIC), self-adhesive resin-based cement (SRC) and resin-based cement (RC). RC was used in both dual cure mode (RC-D) and chemical cure mode (RC-C). First, the compressive strength of each cement was tested according to a standard (ISO 9917-1:2004). Second, load-to-failure test was performed to analyze the crown fracture resistance. CAD/CAM-produced monolithic zirconia crowns with a minimal thickness of 0.5 mm were prepared and cemented to dies with each cement. The crown–die samples were loaded until fracture. Results The compressive strength of SRC, RC-D and RC-C was significantly higher than those of ZPC and GIC ( p < 0.05). However, there was no significant difference in the fracture load of the crown between the groups. Conclusion The values achieved in the load-to-failure test suggest that monolithic zirconia crowns with a minimal thickness of 0.5 mm may have good resistance against fracture regardless of types of cements.