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Fracture Load of Monolithic CAD/CAM Lithium Disilicate Ceramic Crowns and Veneered Zirconia Crowns as a Posterior Implant Restoration

Title
Fracture Load of Monolithic CAD/CAM Lithium Disilicate Ceramic Crowns and Veneered Zirconia Crowns as a Posterior Implant Restoration
Authors
Kim, Jee Hwan;Lee, Su-Jeong;Ryu, Jae Jun;Park, Jun Sub
Issue Date
2013
Journal Title
Implant Dentistry
ISSN
1056-6163
Citation
Implant Dentistry, Vol.22(1) : 66~70, 2013
Abstract
PURPOSE: To compare the fracture load and failure mode of the monolithic lithium disilicate crown (e.max group) and 2 types of veneered zirconia crowns, hand layer (ZV group) and heat pressed (ZP group), as a posterior implant-supported restoration. METHODS: A total of 24 all-ceramic crowns for molar tooth were fabricated using the computer-aided design/computer-assisted manufacture (CAD/CAM) system. The e.max group crowns and zirconia copings for ZV and ZP groups were fabricated using a Cerec milling unit. The ZV group was fabricated using a hand-layer veneering method, and the ZP group using a heat-pressing method. All crowns were luted to the abutments, which were connected to implant fixtures, using resin cement. Fracture load was measured using the universal testing machine, and the fracture surface was evaluated by scanning electron microscopy. RESULTS: The ZP group showed significantly higher fracture load (5229.3 N) compared with the e.max group (3852.1 N) and ZV group (3100.3 N). All fractures in the ZV group occurred in the veneered layer. CONCLUSION: Monolithic CAD/CAM lithium disilicate crowns are applicable to posterior implant-supported restorations because the fracture load was higher than the average occlusal force.
URI
http://ovidsp.ovid.com/ovidweb.cgi?T=JS&CSC=Y&NEWS=N&PAGE=fulltext&AN=00008505-201302000-00012&LSLINK=80&D=ovft

http://ir.ymlib.yonsei.ac.kr/handle/22282913/86247
DOI
10.1097/ID.0b013e318278a576
Appears in Collections:
1. 연구논문 > 2. College of Dentistry > Dept. of Prosthodontics
Yonsei Authors
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