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Quintessence International



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Quintessence Int 40 (2009), No. 7     4. June 2009
Quintessence Int 40 (2009), No. 7  (04.06.2009)

Page 573-579, PubMed:19626232

Retrospective survival analysis of 261 lithium disilicate crowns in a private general practice
Valenti, Marco / Valenti, Alessandro
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.

Keywords: adhesive luting, all-ceramic crown, esthetic dentistry, glass-ceramic, lithium disilicate, retrospective evaluation, single crowns