Physical characteristics of ceramic/glass-polymer based CAD/CAM materials: Effect of finishing and polishing techniques
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PURPOSE. The aim of this study was to compare the effect of different finishing and polishing techniques on water absorption, water solubility, and microhardness of ceramic or glass-polymer based computer-aided design and computer-aided manufacturing (CAD/CAM) materials following thermocycling. MATERIALS AND METHODS. 150 disc-shaped specimens were prepared from three different hybrid materials and divided into five subgroups according to the applied surface polishing techniques. All specimens were subjected up to #4000 grit SiC paper grinding. No additional polishing has been done to the control group (Group I). Other polishing procedures were as follows: Group II: two-stage diamond impregnated polishing discs; Group III: yellow colored rubber based silicone discs; Group IV: diamond polishing paste; and Group V: Aluminum oxide polishing discs. Subsequently, 5000-cycles of thermocycling were applied. The analyses were conducted after 24 hours, 7 days, and 30 days of water immersion. Water absorption and water solubility results were analyzed by two-way ANOVA and Tukey post-hoc tests. Besides, microhardness data were compared by Kruskal-Wallis and Mann- Whitney U tests (P<.05). RESULTS. Surface polishing procedures had significant effects on water absorption and solubility and surface microhardness of resin ceramics (P<.05). Group IV exhibited the lowest water absorption and the highest microhardness values (P<.05). Immersion periods had no effect on the microhardness of hybrid ceramic materials (P>.05). CONCLUSION. Surface finishing and polishing procedures might negatively affect physical properties of hybrid ceramic materials. Nevertheless, immersion periods do not affect the microhardness of the materials. Final polishing by using diamond polishing paste can be recommended for all CAD/CAM materials.
Abstract
PURPOSE. The aim of this study was to compare the effect of different finishing and polishing techniques on water absorption, water solubility, and microhardness of ceramic or glass-polymer based computer-aided design and computer-aided manufacturing (CAD/CAM) materials following thermocycling. MATERIALS AND METHODS. 150 disc-shaped specimens were prepared from three different hybrid materials and divided into five subgroups according to the applied surface polishing techniques. All specimens were subjected up to #4000 grit SiC paper grinding. No additional polishing has been done to the control group (Group I). Other polishing procedures were as follows: Group II: two-stage diamond impregnated polishing discs; Group III: yellow colored rubber based silicone discs; Group IV: diamond polishing paste; and Group V: Aluminum oxide polishing discs. Subsequently, 5000-cycles of thermocycling were applied. The analyses were conducted after 24 hours, 7 days, and 30 days of water immersion. Water absorption and water solubility results were analyzed by two-way ANOVA and Tukey post-hoc tests. Besides, microhardness data were compared by Kruskal-Wallis and Mann- Whitney U tests (P<.05). RESULTS. Surface polishing procedures had significant effects on water absorption and solubility and surface microhardness of resin ceramics (P<.05). Group IV exhibited the lowest water absorption and the highest microhardness values (P<.05). Immersion periods had no effect on the microhardness of hybrid ceramic materials (P>.05). CONCLUSION. Surface finishing and polishing procedures might negatively affect physical properties of hybrid ceramic materials. Nevertheless, immersion periods do not affect the microhardness of the materials. Final polishing by using diamond polishing paste can be recommended for all CAD/CAM materials.
참고문헌 (27)
- Stawarczyk B, "Blue-Light transmittance of esthetic monolithic CAD", CAM materials with respect to their composition, thickness, and curing conditions, 2016, pp.41, 531~540
- Fasbinder DJ, "Surface evaluation of polishing techniques for new resilient CAD", CAM restorative materials, 2016, pp.28, 56~66
- Vichi A, "Effect of finishing and polishing on roughness and gloss of lithium disilicate and lithium silicate zirconia reinforced glass ceramic for CAD", CAM systems, 2018, pp.43, 90~100
- Acar B, "Effects of various polishing techniques and thermal cycling on the surface roughness and color change of polymer-based CAD", CAM materials, 2018, pp.31, 91~96
- Alshali RZ, "Long-term sorption and solubility of bulk-fill and conventional resincomposites in water and artificial saliva", J Dent, 43, pp.1511~1518 (2015)
- Tekçe N, "Changes in surface characteristics of two different resin composites after 1 year water storage : An SEM and AFM study", Scanning, 38, pp.694~700 (2016)
- Egilmez F, "Does artificial aging affect mechanical properties of CAD", CAM composite materials, 2018, pp.62, 65~74
- Hampe R, "The effect of artificial aging on Martens hardness and indentation modulus of different dental CAD", CAM restorative materials, 2018, pp.86, 191~198
- El Gezawi M, "Degradation potential of bulk versus incrementally applied and indirect composites : color, microhardness, and surface deterioration", Oper Dent, 41, pp.e195~e208 (2016)
- Toledano M, "Sorption and solubility of resin-based restorative dental materials", J Dent, 31, pp.43~50 (2003)
- Poplawski T, "Genotoxicity of urethane dimethacrylate, a tooth restoration component", Toxicol in vitro, 24, pp.854~862 (2010)
- Ruse ND, "Resin-composite blocks for dental CAD", CAM applications, 2014, pp.93, 1232~1234
- "ISO 4049. Dentistry - Polymer-based restorative materials" (2009)[URL]
- Gajewski VE, "Monomers used in resin composites : degree of conversion, mechanical properties and water sorption", solubility, 2012, pp.23, 508~514
- Belli R, "Mechanical fatigue degradation of ceramics versus resin composites for dental restorations", Dent Mater, 30, pp.424~432 (2014)
- Vasudeva G, "Monomer systems for dental composites and their future : a review", J Calif Dent Assoc, 37, pp.389~398 (2009)
- Fleming GJ, "The potential of a resin-composite to be cured to a 4mm depth", Dent Mater, 24, pp.522~529 (2008)
- Liebermann A, "Physicomechanical characterization of polyetheretherketone and current esthetic dental CAD", CAM polymers after aging in different storage media, 2016, pp.115, 321~328
- Rodrigues SA Jr, "Flexural strength and Weibull analysis of a microhybrid and a nanofill composite evaluated by 3-and 4-point bending tests", Dent Mater, 24, pp.426~431 (2008)
- Takeshige F, "Fatigue behavior of resin composites in aqueous environments", Dent Mater, 23, pp.893~899 (2007)
- Reports of councils and bureaus revised American National Standards Institute, "American Dental Association specification no 27 for resin-based filling materials", American Dental Association, 1988, pp.8~9
- Watanabe T, "Influence of polishing duration on surface roughness of resin composites", J Oral Sci, 47, pp.21~25 (2005)
- Venturini D, "Effect of polishing techniques and time on surface roughness, hardness and microleakage of resin composite restorations", Oper Dent, 31, pp.11~17 (2006)
- Aytac F, "Effects of novel finishing and polishing systems on surface roughness and morphology of nanocomposites", J Esthet Restor Dent, 28, pp.247~261 (2016)
- Egilmez F, "Short and long term effects of additional post curing and polishing systems on the color change of dental nano-composites", Dent Mater J, 32, pp.107~114 (2013)
- Bottino MC, "Polishing methods of an alumina-reinforced feldspar ceramic", Braz Dent J, 17, pp.285~289 (2006)
- Rinastiti M, "Effects of surface conditioning on repair bond strengths of nonaged and aged microhybrid, nanohybrid, and nanofilled composite resins", Clin Oral Investig, 15, pp.625~633 (2011)