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International Journal of Esthetic Dentistry  (English Edition)
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Int J Esthet Dent 10 (2015), No. 2     21. Apr. 2015
Int J Esthet Dent 10 (2015), No. 2  (21.04.2015)

Page 246-257, PubMed:25874272


Retrospective survival analysis of 110 lithium disilicate crowns with feather-edge marginal preparation
Valenti, Marco / Valenti, Alessandro
Purpose: To evaluate the clinical performance of lithium disilicate (LiDiSi) crowns with a feather-edge finish line margin over a 9-year period.
Materials and methods: In total, 110 lithium disilicate crowns, 40 anterior (36.3%) and 70 posterior (63.7%), were cemented with resin cement after fluoridric acid and silane surface treatment and observed by a different clinician. The data were analyzed using the Kaplan-Meier method. The clinical evaluation used the California Dental Association (CDA) modified criteria after recalling all patients between January and April 2013.
Results: Two crowns had failed and were replaced due to core fractures. One chipping occurred on a first molar and the ceramic surface was polished. The overall survival probability was 96.1% up to 9 years, with a failure rate of 1.8%.
Conclusion: In this retrospective analysis, lithium disilicate with a vertical finish line used in single-crown restorations had a low clinical failure rate up to 9 years.
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