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Quintessence Publishing: Journals: QI
Quintessence International

Edited by Eli Eliav

ISSN 0033-6572 (print) • ISSN 1936-7163 (online)

Publication:
July/August 2009
Volume 40 , Issue 7

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Retrospective survival analysis of 261 lithium disilicate crowns in a private general practice

Marco Valenti/Alessandro Valenti

Pages: 573579
PMID: 19626232

Objectives: This retrospective study evaluated the clinical performance and long-term survival of glass-ceramic lithium disilicate all-ceramic restorations in anterior and posterior areas over a 10-year period. Method and Materials: Following a consistent protocol over 10 years, 261 lithium disilicate crowns (IPS Empress 2, Ivoclar Vivadent), including 101 anterior (38.7%) and 160 posterior (61.3%), were cemented using an adhesive technique and observed by the clinician who prepared and luted them. The data were analyzed using the Kaplan-Meier test. The clinical evaluation adopted the California Dental Association (CDA) modified criteria after recalling all patients between January and May 2008. Results: Six crowns failed and were replaced, 4 due to chipping and 2 due to core fracture. The overall survival rate was 95.5%. Conclusion: In this retrospective evaluation, lithium disilicate ceramic restorations had a low clinical failure rate after up to 120 months. (Quintessence Int 2009;40:573579)

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