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http://dx.doi.org/10.4047/jap.2022.14.1.56

Color stability of fully- and pre-crystalized chair-side CAD-CAM lithium disilicate restorations after required and additional sintering processes  

Jurado, Carlos Alberto (Texas Tech University Health Sciences Center El Paso Woody L. Hunt School of Dental Medicine)
El-Gendy, Tamer (A. T. Still University Arizona School of Dentistry and Oral Health)
Hyer, Jared (A. T. Still University Arizona School of Dentistry and Oral Health)
Tsujimoto, Akimasa (Department of Operative Dentistry, University of Iowa College of Dentistry)
Publication Information
The Journal of Advanced Prosthodontics / v.14, no.1, 2022 , pp. 56-62 More about this Journal
Abstract
PURPOSE. The aim of this study was to investigate shade changes in fully- and pre-crystalized CAD-CAM lithium disilicate crowns after the required and additional firing processes. MATERIALS AND METHODS. One hundred and five crowns of shade A1 with high translucency were milled out of CAD-CAM lithium disilicate blocks and categorized as follows (n = 15): (1) restorations fabricated from Straumann n!ce with no additional sintering process; (2) restorations fabricated from Straumann n!ce with one additional sintering process; (3) restorations fabricated from Straumann n!ce with two additional sintering processes; (4) restorations fabricated from Amber Mill with one sintering process; (5) restorations fabricated from Amber Mill with two sintering processes; (6) restorations fabricated from IPS e.max CAD with one sintering process; (7) restorations fabricated from IPS e.max CAD with two sintering processes. All restorations were evaluated with a color imaging spectrophotometer. RESULTS. All restorations presented some color alteration from the original shade both after a single and after two firing processes. CONCLUSION. The required and additional sintering processes for restorations fabricated with chairside CAD-CAM lithium disilicate blocks cause an alteration of the original shade selected. Shade A1 high translucency restorations tend to change to a more yellowish B1 shade after a sintering process.
Keywords
Prosthodontics; Ceramics; Crowns; Dentistry; Esthetics;
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Times Cited By KSCI : 2  (Citation Analysis)
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