Light transmittance of CAD/CAM ceramics with different shades and thicknesses andmicrohardness of the underlying light-cured resin cement
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Objectives: The aim of this in vitro study was to evaluate the effects of the thickness and shade of 3 types of computer-aided design/computer-aided manufacturing (CAD/CAM) materials. Materials and Methods: A total of 120 specimens of 2 shades (A1 and A3) and 2 thicknesses (1 and 2 mm) were fabricated using VITA Mark II (VM; VITA Zahnfabrik), IPS e.max CAD (IE; IvoclarVivadent), and VITA Suprinity (VS; VITA Zahnfabrik) (n = 10 per subgroup). The amount of light transmission through the ceramic specimens was measured by a radiometer (Optilux, Kerr). Light-cured resin cement samples (Choice 2, Bisco) were fabricated in a Teflon mold and activated through the various ceramics with different shades and thicknesses using an LED unit (Bluephase, IvoclarVivadent). In the control group, the resin cement sample was directly light-cured without any ceramic. Vickers microhardness indentations were made on the resin surfaces (KoopaPazhoohesh) after 24 hours of dark storage in a 37°C incubator. Data were analyzed using analysis of variance followed by the Tukey post hoc test (α = 0.05). Results: Ceramic thickness and shade had significant effects on light transmission and the microhardness of all specimens (p < 0.05). The mean values of light transmittance and microhardness of the resin cement in the VM group were significantly higher than those observed in the IE and VS groups. The lowest microhardness was observed in the VS group, due to the lowest level of light transmission (p < 0.05). Conclusion: Greater thickness and darker shades of the 3 types of CAD/CAM ceramics significantly decreased the microhardness of the underlying resin cement.
Abstract
Objectives: The aim of this in vitro study was to evaluate the effects of the thickness and shade of 3 types of computer-aided design/computer-aided manufacturing (CAD/CAM) materials. Materials and Methods: A total of 120 specimens of 2 shades (A1 and A3) and 2 thicknesses (1 and 2 mm) were fabricated using VITA Mark II (VM; VITA Zahnfabrik), IPS e.max CAD (IE; IvoclarVivadent), and VITA Suprinity (VS; VITA Zahnfabrik) (n = 10 per subgroup). The amount of light transmission through the ceramic specimens was measured by a radiometer (Optilux, Kerr). Light-cured resin cement samples (Choice 2, Bisco) were fabricated in a Teflon mold and activated through the various ceramics with different shades and thicknesses using an LED unit (Bluephase, IvoclarVivadent). In the control group, the resin cement sample was directly light-cured without any ceramic. Vickers microhardness indentations were made on the resin surfaces (KoopaPazhoohesh) after 24 hours of dark storage in a 37°C incubator. Data were analyzed using analysis of variance followed by the Tukey post hoc test (α = 0.05). Results: Ceramic thickness and shade had significant effects on light transmission and the microhardness of all specimens (p < 0.05). The mean values of light transmittance and microhardness of the resin cement in the VM group were significantly higher than those observed in the IE and VS groups. The lowest microhardness was observed in the VS group, due to the lowest level of light transmission (p < 0.05). Conclusion: Greater thickness and darker shades of the 3 types of CAD/CAM ceramics significantly decreased the microhardness of the underlying resin cement.
참고문헌 (40)
- Kesrak P, "Surface hardness of resin cement polymerized under different ceramic materials", Int J Dent, 2012, pp.317509~ (2012)
- Della Bona A, "Optical properties of CAD-CAM ceramic systems", J Dent, 42, pp.1202~1209 (2014)[DOI]
- Borges GA, "Influence of different ceramics on resin cement Knoop hardness number", Oper Dent, 33, pp.622~628 (2008)[DOI]
- Lawn BR, "Materials design in the performance of all-ceramic crowns", Biomaterials, 25, pp.2885~2892 (2004)[DOI]
- Ozturk E, "Effects of ceramic shade and thickness on the micro-mechanical properties of a light-cured resin cement in different shades", Acta Odontol Scand, 73, pp.503~507 (2015)[DOI]
- 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
- Alt V, "Fracture strength of temporary fixed partial dentures: CAD", CAM versus directly fabricated restorations, 2011, pp.27, 339~347
- Goncu Basaran E, "Load-bearing capacity of handmade and computer-aided design--computer-aided manufacturing-fabricated three-unit fixed dental prostheses of particulate filler composite", Acta Odontol Scand, 69, pp.144~150 (2011)[DOI]
- Stawarczyk B, "Discoloration of manually fabricated resins and industrially fabricated CAD", CAM blocks versus glass-ceramic: effect of storage media, duration, and subsequent polishing, 2012, pp.31, 377~383
- Edelhoff D, "CAD", CAM-generated high-density polymer restorations for the pretreatment of complex cases: a case report, 2012, pp.43, 457~467
- Li RW, "Ceramic dental biomaterials and CAD", CAM technology: state of the art, 2014, pp.58, 208~216
- Liu PR, "Panorama of dental CAD", CAM restorative systems, 2008, pp.29, 482~488
- Miyazaki T, "Current status of zirconia restoration", J Prosthodont Res, 57, pp.236~261 (2013)[DOI]
- Holand W, "Bioceramics and their applications for dental restoration", Adv Appl Ceramics, 108, pp.373~380 (2009)[DOI]
- Kelly JR, "Ceramic materials in dentistry: historical evolution and current practice", Aust Dent J, 56(Supplement 1), pp.84~96 (2011)[DOI]
- Giordano R, "Materials for chairside CAD", CAM-produced restorations, 2006, pp.137(Supplement), 14S~21S
- Sjogren G, "A 10-year prospective evaluation of CAD", CAM-manufactured (Cerec) ceramic inlays cemented with a chemically cured or dual-cured resin composite, 2004, pp.17, 241~246
- Zimmer S, "Long-term survival of Cerec restorations: a 10-year study", Oper Dent, 33, pp.484~487 (2008)[DOI]
- Culp L, "Lithium disilicate: the restorative material of multiple options", Compend Contin Educ Dent, 31, pp.716~725 (2010)
- Tysowsky GW, "The science behind lithium disilicate: a metal-free alternative", Dent Today, 28, pp.112~113 (2009)
- Dirxen C, "Clinical performance of a new biomimetic double network material", Open Dent J, 7, pp.118~122 (2013)[DOI]
- Yoshida K, "Post-irradiation hardening of dual-cured and light-cured resin cements through machinable ceramics", Am J Dent, 19, pp.303~307 (2006)
- Kilinc E, "The effect of ceramic restoration shade and thickness on the polymerization of light- and dual-cure resin cements", Oper Dent, 36, pp.661~669 (2011)[DOI]
- Ozturk E, "Micromechanical properties of veneer luting resins after curing through ceramics", Clin Oral Investig, 16, pp.139~146 (2012)[DOI]
- Pazin MC, "Effects of ceramic thickness and curing unit on light transmission through leucite-reinforced material and polymerization of dual-cured luting agent", J Oral Sci, 50, pp.131~136 (2008)[DOI]
- Shen C, "Phillips' science of dental materials", pp.832~ (2003), Saunders
- Janda R, "Color stability of resin matrix restorative materials as a function of the method of light activation", Eur J Oral Sci, 112, pp.280~285 (2004)[DOI]
- Goldberg M, "In vitro and in vivo studies on the toxicity of dental resin components: a review", Clin Oral Investig, 12, pp.1~8 (2008)
- Peixoto RT, "Light transmission through porcelain", Dent Mater, 23, pp.1363~1368 (2007)[DOI]
- Tarle Z, "Comparison of composite curing parameters: effects of light source and curing mode on conversion, temperature rise and polymerization shrinkage", Oper Dent, 31, pp.219~226 (2006)[DOI]
- Janda R, "Effect of exponential polymerization on color stability of resin-based filling materials", Dent Mater, 23, pp.696~704 (2007)[DOI]
- Rasetto FH, "Light transmission through all-ceramic dental materials: a pilot study", J Prosthet Dent, 91, pp.441~446 (2004)[DOI]
- Wang L, "Mechanical properties of dental restorative materials: relative contribution of laboratory tests", J Appl Oral Sci, 11, pp.162~167 (2003)[DOI]
- Ilie N, "Correlation between ceramics translucency and polymerization efficiency through ceramics", Dent Mater, 24, pp.908~914 (2008)[DOI]
- Ozturk E, "Influence of ceramic thickness and type on micromechanical properties of light-cured adhesive bonding agents", Acta Odontol Scand, 72, pp.543~548 (2014)[DOI]
- Awad D, "Translucency of esthetic dental restorative CAD", CAM materials and composite resins with respect to thickness and surface roughness, 2015, pp.113, 534~540
- Al Ben Ali A, "The effect of variations in translucency and background on color differences in CAD", CAM lithium disilicate glass ceramics, 2014, pp.23, 213~220
- Sakaguchi RL, "Craig's restorative dental materials", pp.253~275 (2012), Mosby Elsevier
- van Noort R, "Introduction to dental materials", pp.231~246 (2013), Mosby Elsevier
- Barghi N, "LED and halogen lights: effect of ceramic thickness and shade on curing luting resin", Compend Contin Educ Dent, 24, pp.497~504 (2003)
