title: Retrospective survival analysis of 261 lithium disilicate crowns in a private general practice.
abstract: OBJECTIVE
  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.
  
  
  METHODS
  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%.
  
  
  CONCLUSIONS
  In this retrospective evaluation, lithium disilicate ceramic restorations had a low clinical failure rate after up to 120 months.
authors.affiliation: info@studiodentisticovalenti.com
authors.forename: Marco
authors.initials: M
authors.lastname: Valenti
authors.forename: Alessandro
authors.initials: A
authors.lastname: Valenti
mesh_terms: D002484:Cementation; D003442:Crowns; D003776:Dental Porcelain; D019232:Dental Restoration Failure; D005260:Female; D005792:General Practice, Dental; D006801:Humans; D053208:Kaplan-Meier Estimate; D018020:Lithium Compounds; D008297:Male; D011331:Private Practice; D012189:Retrospective Studies
chemical_list: C118557:Empress 2; D018020:Lithium Compounds; D003776:Dental Porcelain