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http://dx.doi.org/10.4047/jap.2016.8.6.417

The effects of different polishing techniques on the staining resistance of CAD/CAM resin-ceramics  

Sagsoz, Omer (Department of Restorative Treatment, Faculty of Dentistry, Ataturk University)
Demirci, Tevfik (Department of Pediatric Dentistry, Faculty of Dentistry, Ataturk University)
Demirci, Gamze (Department of Restorative Treatment, Faculty of Dentistry, Ataturk University)
Sagsoz, Nurdan Polat (Department of Dental Prosthetic Technologies, Health Services Vocational School, Ataturk University)
Yildiz, Mehmet (Department of Restorative Treatment, Faculty of Dentistry, Ataturk University)
Publication Information
The Journal of Advanced Prosthodontics / v.8, no.6, 2016 , pp. 417-422 More about this Journal
Abstract
PURPOSE. The purposes of this study were to evaluate the staining resistance of CAD/CAM resin-ceramics polished with different techniques and to determine the effectiveness of the polishing techniques on resin-ceramics, comparing it with that of a glazed glass-ceramic. MATERIALS AND METHODS. Four different CAD/CAM ceramics (feldspathic ceramic: C-CEREC Blocs, (SIRONA) and three resin-ceramics: L-Lava Ultimate, (3M ESPE), E-Enamic, (VITA) and CS-CeraSmart, (GC)) and one light cure composite resin: ME-Clearfil Majesty Esthetic (Kuraray) were used. Only C samples were glazed (gl). Other restorations were divided into four groups according to the polishing technique: nonpolished control group (c), a group polished with light cure liquid polish (Biscover LV BISCO) (bb), a group polished with ceramic polishing kit (Diapol, EVE) (cd), and a group polished with composite polishing kit (Clearfil Twist Dia, Kuraray) (kc). Glazed C samples and the polished samples were further divided into four subgroups and immersed into different solutions: distilled water, tea, coffee, and fermented black carrot juice. Eight samples ($8{\times}8{\times}1mm$) were prepared for each subgroup. According to CIELab system, four color measurements were made: before immersion, immersion after 1 day, after 1 week, and after 1 month. Data were analyzed with repeated measures of ANOVA (${\alpha}=.05$). RESULTS. The highest staining resistance was found in gl samples. There was no difference among gl, kc and cd (P>.05). Staining resistance of gl was significantly higher than that of bb (P<.05). Staining resistances of E and CS were significantly higher than those of L and ME (P<.05). CONCLUSION. Ceramic and composite polishing kits can be used for resin ceramics as a counterpart of glazing procedure used for full ceramic materials. Liquid polish has limited indications for resin ceramics.
Keywords
CAD/CAM; Polishing techniques; Resin-ceramics; Staining resistance;
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Times Cited By KSCI : 2  (Citation Analysis)
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