J Adv Prosthodont.  2018 Feb;10(1):50-57. 10.4047/jap.2018.10.1.50.

The effect of glazing and aging on the surface properties of CAD/CAM resin blocks

• Tekçe N
• Fidan S
• Tuncer S
• Kara D
• Demirci M

• KMID: 2403998
• DOI: http://doi.org/10.4047/jap.2018.10.1.50

Abstract

PURPOSE
To investigate the effect of accelerated aging on surface properties of glazed CAD/CAM resin blocks using a 2D surface profilometer and a 3D non-contact optical profilometer.
MATERIALS AND METHODS
Three types of CAD/CAM resin restorative materials, LAVA Ultimate (3M ESPE, St Paul, MN, USA), VITA Enamic (Vita Zahnfabrik H. Rauter, Bad Säckingen, Germany), and Cerasmart (GC Corparation, Tokyo, Japan) were used for this study. CAD/CAM blocks were cut in 3-mm thickness slabs and divided into three groups; Group 1: control group (specimens polished with 600 grit SCI paper); Group 2: specimens sandblasted, silanized, and glazed with Optiglaze Color (GC); Group 3: glazed specimens subjected to 5000 thermocycles (n=15). The surface roughness (Ra and Rz) was evaluated using a profilometer and a 3D scanning instrument. Data were analyzed using two-way ANOVA and Tukey's post-hoc test (P < .05).
RESULTS
LAVA, VITA, and Cerasmart exhibited statistically similar Ra and Rz values for each group (P>.05). For VITA and Cerasmart, the specimens in Group 1 exhibited significantly higher Ra values than Group 2 (P < .05). Group 1 (0.502 Ra), Group 2 (0.384 Ra), and Group 3 (0.431 Ra) exhibited statistically similar Ra values for LAVA (P=.062). After 5000 thermocycles, surface roughness values did not change significantly for glazed LAVA, VITA, and Cerasmart (P>.05).
CONCLUSION
Glaze material Optiglaze Color makes CAD/CAM resin surfaces smooth and glazed CAD/CAM surfaces seem resistant to deterioration under 5000 thermocycles.

Keyword

CAD/CAM restoratives; Sandblasting; Optiglaze color; Surface roughness

MeSH Terms

Aging*
Surface Properties*

Figure

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  Fig. 1 Illustration of surface roughness parameters.

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  Fig. 2 Illustration of obtaining profile roughness lines from 3D scanned surfaces. Ten repetitions were performed for each measurement and the median value was accepted as the profile image.

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  Fig. 3 3D images of the specimens in group 1 (SiC paper grinding specimens). (A) LAVA, (B), VITA, (C) Cerasmart.

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  Fig. 4 3D images of the specimens in group 2 (glazed specimens with Optiglaze Color). (A) LAVA, (B), VITA, (C) Cerasmart.

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  Fig. 5 3D images of the specimens in group 3 (thermocycled specimens). (A) LAVA, (B), VITA, (C) Cerasmart.

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