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evaluation of translucency of cad cam materials

Burcu Gunal, M Mutahhar Ulusoy
OBJECTIVE: This study evaluated the optical properties of contemporary monolithic CAD-CAM materials with different chemical compositions. MATERIALS AND METHODS: Totally, 210 rectangular-shaped, A2 shade specimens (12 × 14 mm) were fabricated from VITA Suprinity T, VITA Enamic T, VITA Mark II, GC Cerasmart LT, Lava Ultimate LT, IPS e.max CAD LT and Prettau Anterior blocks and polished to thicknesses of 0.5 ± 0.01 and 1.0 ± 0.01 mm (n = 15 each material)...
June 19, 2018: Journal of Esthetic and Restorative Dentistry
Gabriela Nishioka, Catina Prochnow, Aline Firmino, Marina Amaral, Marco Antonio Bottino, Luiz Felipe Valandro, Melo Renata Marques de
This in vitro study evaluated the fatigue strength of different ceramic materials indicated for monolithic restorations. Disc-shaped specimens were made according to ISO 6872 from five different ceramic materials: feldspathic ceramic (FC), polymer-infiltrated ceramic network (PIC), lithium disilicate glass-ceramic (LD), zirconia-reinforced lithium silicate glass-ceramic (ZLS), and high translucent tetragonal zirconia polycrystals doped by yttrium (YZ-HT). After obtaining the mean of each material (n = 5) from monotonic load-to-failure tests, specimens (n = 20) were subjected to fatigue tests (staircase method) using a biaxial flexural setup (piston-on-three-balls), to determine the fatigue strength...
June 11, 2018: Brazilian Oral Research
Gulce Alp, Meryem Gulce Subasi, William M Johnston, Burak Yilmaz
STATEMENT OF PROBLEM: The effects of surface treatments and coffee thermocycling on the color and relative translucency of a recently introduced computer-aided design and computer-aided manufacturing (CAD-CAM) monolithic glass-ceramic are unknown. PURPOSE: The purpose of this in vitro study was to evaluate the effect of coffee thermocycling on the color and relative translucency parameter (RTP) of CAD-CAM monolithic glass-ceramics after different surface treatments...
March 15, 2018: Journal of Prosthetic Dentistry
Petros Mourouzis, Elisabeth Koulaouzidou, Georgios Palaghias, Maria Helvatjoglu-Antoniades
AIM: Color matching of the restoration to the adjacent teeth can be difficult due to the translucency of the ceramic and the visual exposure of the polymerized resin cement through the ceramic material. The aim of this study was to identify color differences between try-in pastes and the corresponding luting resin composites. MATERIALS AND METHODS: The materials tested were Variolink Veneer, Variolink Try-In, Variolink Esthetic LC, and Variolink Esthetic Try-In...
2018: International Journal of Esthetic Dentistry
Sevcan Kurtulmus-Yilmaz, Esra Cengiz, Salim Ongun, Izgen Karakaya
PURPOSE: To evaluate the effect of different surface treatments on mechanical and optical properties of lithium disilicate ceramic (IPS e.max CAD), 2 resin nanoceramics (Lava Ultimate, GC Cerasmart), and polymer-infiltrated ceramic network material (Vita Enamic). MATERIALS AND METHODS: CAD/CAM blocks were sectioned into 4 × 1 × 14 mm3 bars for three-point bending test and 1 × 8 × 8 mm3 square specimens were obtained for color and translucency measurements. Bar-shaped and square specimens were divided into five groups according to the surface treatment method as: control (no treatment), hydrofluoric acid etching, airborne-particle abrasion, 2 W and 3 W Er,Cr:YSGG laser irradiation (n = 10)...
January 11, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
İzgen Karakaya, Esra Cengiz
The aim of this study was to evaluate color stability of 3 restorative materials, discoloration ability of different solutions, efficacy of 2 office bleaching agents, and surface roughness and topography. Sixty specimens for Clearfil Majesty Esthetic (CME), Lava Ultimate (LU), and Vita Enamic (VE) were prepared. They were immersed into 3 staining solutions for 2 weeks and then they were bleached. According to the measured L ⁎ , a ⁎ , and b ⁎ parameters described by CIELAB system, color changes (Δ E 00 ), translucency parameters (TP), whiteness index values ( W ⁎ ), and changes in closeness to pure white (Δ W ⁎ ) were calculated...
2017: BioMed Research International
Nazmiye Sen, Yesim Olcer Us
STATEMENT OF PROBLEM: Achieving natural tooth appearance with sufficient mechanical strength is one of the most challenging issues of computer-assisted design and computer-assisted manufacturing (CAD-CAM) materials. However, limited evidence is available regarding their optical and mechanical properties for proper and evidence-based material selection in clinical practice. PURPOSE: The purpose of this in vitro study was to assess and compare the translucency and biaxial flexural strength of 5 monolithic CAD-CAM restorative materials...
April 2018: Journal of Prosthetic Dentistry
Sasipin Lauvahutanon, Maho Shiozawa, Hidekazu Takahashi, Naohiko Iwasaki, Meiko Oki, Werner J Finger, Mansuang Arksornnukit
OBJECTIVES: This study evaluated color differences (ΔEs) and translucency parameter changes (ΔTPs) of various computer-aided design/computer-aided manufacturing (CAD/CAM) blocks after immersion in coffee. MATERIALS AND METHODS: Eight CAD/CAM blocks and four restorative composite resins were evaluated. The CIE L(*)a(*)b(*) values of 2.0 mm thick disk-shaped specimens were measured using the spectrophotometer on white and black backgrounds (n = 6). The ΔEs and ΔTPs of one day, one week, and one month immersion in coffee or water were calculated...
February 2017: Restorative Dentistry & Endodontics
Joana Schönberger, Kurt-Jürgen Erdelt, Daniel Bäumer, Florian Beuer
OBJECTIVES: The purpose of this in vitro study was to compare the precision of fit of frameworks milled from semi-sintered regular zirconia and high-translucent (HT) zirconia blanks, fabricated with two different CAD/CAM systems. MATERIAL AND METHODS: Three-unit, posterior fixed dental prostheses (FDP) frameworks were fabricated for standardized dies (n = 11) with two different laboratory computer-aided design (CAD)/computer-aided manufacturing (CAM) systems (Cercon/Ceramill)...
November 2017: Clinical Oral Investigations
Bogna Stawarczyk, Anja Liebermann, Marlis Eichberger, Jan-Frederik Güth
OBJECTIVES: To determine the mechanical and optical properties of CAD/CAM composites (LAVA Ultimate, Cerasmart, Shofu Block and two exp. CAD/CAM composites), a hybrid material (VITA Enamic), a leucite (IPS Empress CAD) and a lithium disilicate glass-ceramic (IPS e.max CAD). MATERIALS AND METHODS: Three-point flexural strength (FS) was investigated according ISO 6872:2008 (N=240/n=30). Two-body wear (TBW) was analyzed in a chewing simulator (1,200,000 cycles, 50N, 5°/55°C) using human teeth as antagonists (N=120/n=15)...
March 2015: Journal of the Mechanical Behavior of Biomedical Materials
Y Sravanthi, Y V Ramani, Asha M Rathod, Sabita M Ram, Hetal Turakhia
INTRODUCTION: All-ceramic crowns with different core materials of different strength and aesthetics are available in recent years. The aesthetics of the crown depends mainly on the shade and translucency. Clinician should be aware of the quality and characteristics of these materials so that they will be able to opt for good material for successful clinical use. AIM AND OBJECTIVE: The aim of this study was to evaluate and compare the translucency of crowns fabricated with three different commercially available all-ceramic materials viz...
February 2015: Journal of Clinical and Diagnostic Research: JCDR
Daniel Awad, Bogna Stawarczyk, Anja Liebermann, Nicoleta Ilie
STATEMENT OF PROBLEM: Little information is available about the translucency of monolithic CAD/CAM materials. PURPOSE: The purpose of this study was to evaluate the translucency of restorative CAD/CAM materials and direct composite resins with respect to thickness and surface roughness. MATERIALS AND METHODS: In total, 240 disk-shaped specimens (12×14×1 mm and 12×14×2 mm) of 3 different CAD/CAM glass ceramics (CELTRA Duo, IPS e.max CAD, IPS Empress CAD), a fine-structure feldspathic ceramic (VITA Mark II), a hybrid ceramic (VITA Enamic), a resin nanoceramic composite resin (LAVA Ultimate), an experimental (CAD/CAM nanohybrid composite resin), 2 interim materials (Telio CAD; VITA CAD-Temp), and 3 direct composite resins (Tetric EvoCeram; Filtek Supreme XTE; Tetric EvoCeram Bulk Fill) were fabricated (n=10)...
June 2015: Journal of Prosthetic Dentistry
Alessandro Vichi, Michele Carrabba, Rade Paravina, Marco Ferrari
OBJECTIVES: To compare translucency of the ceramic materials (CEREC CAD/CAM). MATERIALS AND METHODS: Fifteen ceramic materials for CEREC CAD/CAM system were evaluated: IPS e.max HT/LT/MO, ZirCAD, Empress HT/LT; VITA Mark II, VITA AL; VITA YZ, VITA In-Ceram Spinell/Alumina/Zirconia; and Sirona InCoris AL; Sirona InCoris ZI/TZI. Specimens (0.5-mm and 1.0-mm thick; n = 10 each material) were cut from commercial blocks using a water-cooled diamond saw. Contrast ratio (CR = YB /YW ) was measured using a spectrophotometer with an integrating sphere...
July 2014: Journal of Esthetic and Restorative Dentistry
J M van der Zel, J W J M Dekker, P W Balfoort
Around the year 2000, zirconia was introduced in dentistry. It is a material with great strength and attractive aesthetic properties, such as translucency and colour. Recent advances in digital dentistry are aimed at veneering the supporting structure ofzirconia with a layer of glass ceramics by means of an automated process. With the Primero process, a transparent outer layer of glass ceramic is applied directly onto the zirconia core, milled in the green stage and sintered. Because the restorations produced in this way have a two-layer structure like natural teeth, they obtain an aesthetic look similar to natural dental elements...
February 2014: Nederlands Tijdschrift Voor Tandheelkunde
Sedanur Turgut, Bora Bagis, Elif Aydogan Ayaz
OBJECTIVES: To evaluate the cumulative effect of the abutment tooth and resin cement colour on the resultant optical properties of porcelain laminate veneers (PLVs) fabricated with leucite-based CAD/CAM blocks with different shades and thicknesses. METHODS: A total of 224 ceramic specimens were prepared from the IPS Empress CAD with four different shades of HT-A1, LT-A1, MT-A1 and Bl-1. Resin composite discs were prepared with shade A3.5. For the cementation, 4 different shades of light-cure resin cements were chosen...
January 2014: Journal of Dentistry
Takashi Miyazaki, Takashi Nakamura, Hideo Matsumura, Seiji Ban, Taira Kobayashi
During the past decade, zirconia-based ceramics have been successfully introduced into the clinic to fabricate fixed dental prostheses (FDPs), along with a dental computer-aided/computer-aided manufacturing (CAD/CAM) system. In this article (1) development of dental ceramics, (2) the current status of dental CAD/CAM systems, (3) CAD/CAM and zirconia restoration, (4) bond between zirconia and veneering ceramics, (5) bond of zirconia with resin-based luting agents, (6) surface finish of zirconia restoration and antagonist enamel wear, and (7) clinical evaluation of zirconia restoration are reviewed...
October 2013: Journal of Prosthodontic Research
Shuigen Li, Liping Pang, Jiangwu Yao
OBJECTIVE: To evaluate the effects of firing numbers on the total opening pore volume (TPV), translucency parameter (TP) and color of dental all-ceramic systems. METHODS: Specimens of three kinds of all-ceramics systems were made, i.e. heat pressed all-ceramic (IPS Empress II), alumina all-ceramic (In-Cream alumina blanks) and zirconia all-ceramic (Cercon CAD/CAM zirconia). The specimens' TP, lightness (deltaL), chroma (deltaC) and TPV after 1, 3 and 5 firings were measured and calculated by spectrophotometer and surface area/porosity system...
August 2012: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
Malathi Dayalan, Abhishek Jairaj, K R Nagaraj, Ravindra C Savadi
Post and core therapy is regarded as the treatment of choice for restoring severely damaged endodontically treated teeth. Critical control of endodontic materials in the coronal third of the canal and pulp chamber is essential in order to maintain its colour and translucency. In addition to this, the duplication of the optical characteristics of an intact tooth, including shade translucency and fluorescence is often made difficult by the use of metal infrastructures. As a result of this tooth colored posts have gained popularity especially in aesthetic areas...
December 2010: Journal of Indian Prosthodontic Society
Yada Chaiyabutr, John C Kois, Dene Lebeau, Gary Nunokawa
STATEMENT OF PROBLEM: A dark-colored prepared abutment tooth may negatively affect the esthetic outcome of a ceramic restoration if the tooth is restored using translucent enamel-like ceramic materials. PURPOSE: The purpose of this study was to evaluate the cumulative effect that the tooth abutment color, cement color, and ceramic thickness have on the resulting optical color of a CAD/CAM glass-ceramic lithium disilicate-reinforced crown. MATERIAL AND METHODS: A CAD/CAM glass-ceramic lithium disilicate-reinforced monolithic crown (IPS e...
February 2011: Journal of Prosthetic Dentistry
Paolo Baldissara, Altin Llukacej, Leonardo Ciocca, Felipe L Valandro, Roberto Scotti
STATEMENT OF PROBLEM: Zirconia cores are reported to be less translucent than glass, lithium disilicate, or alumina cores. This could affect the esthetic appearance and the clinical choices made when using zirconia-based restorations. PURPOSE: The purpose of this in vitro study was to evaluate the translucency of zirconia copings for single crowns fabricated using different CAD/CAM systems, using lithium disilicate glass ceramic as a control. MATERIAL AND METHODS: Using impressions made from a stainless steel complete-crown master die, 9 stone cast replicas were fabricated, numbered, and distributed into 8 ceramic ZrO(2) CAD/CAM system groups (Lava Frame 0...
July 2010: Journal of Prosthetic Dentistry
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