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Cad/cam veneer bond strength

Kai Chun Li, LeYing Tran, David J Prior, J Neil Waddell, Michael V Swain
OBJECTIVE: The objective of the present study was to determine the hardness and adhesion strength at the porcelain to alloy interface. METHODS: 15 bi-layer porcelain veneered Co-Cr specimens of each alloy group [cast, powder metallurgy (PM), CAD/CAM(CC)] were manufactured. 12 bi-layered specimens were tested using four-point bend strain energy release rate adhesion test. One before and after porcelain firing specimen of each alloy group were nano-indented at the bulk and metal-porcelain interface to determine the mechanical properties...
September 23, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
Hamid Jalali, Zeinab Bahrani, Somayeh Zeighami
AIM: To achieve acceptable contour, color, esthetics, and occlusal relations, the porcelain may be subjected to several firing cycles. This study sought to assess the effect of multiple firing cycles on the microtensile bond strength (MTBS) of lithium disilicate-based ceramics (e.max Press, e.max CAD). MATERIALS AND METHODS: IPS e.max computer aided design (CAD) cores were fabricated using CAD/(Computer Aided Manufacturing (CAM)) technology, and IPS e.max Press cores were fabricated using the heat-pressing technique (12 × 12 × 4 mm(3))...
2016: Journal of Contemporary Dental Practice
Jean-Jacques Canneto, Maria Cattani-Lorente, Stéphane Durual, Anselm H W Wiskott, Susanne S Scherrer
OBJECTIVES: The purpose of this study was to assess surface and subsurface damage on 4 CAD-CAM high-strength ceramics after grinding with diamond disks of 75μm, 54μm and 18μm and to estimate strength losses based on damage crack sizes. METHODS: The materials tested were: 3Y-TZP (Lava), dense Al2O3 (In-Ceram AL), alumina glass-infiltrated (In-Ceram ALUMINA) and alumina-zirconia glass-infiltrated (In-Ceram ZIRCONIA). Rectangular specimens with 2 mirror polished orthogonal sides were bonded pairwise together prior to degrading the top polished surface with diamond disks of either 75μm, 54μm or 18μm...
February 2016: Dental Materials: Official Publication of the Academy of Dental Materials
Atsushi Nishigori, Takamitsu Yoshida, Marco C Bottino, Jeffrey A Platt
STATEMENT OF PROBLEM: The influence of yttria-stabilized tetragonal zirconia polycrystal surface treatment on veneering porcelain shear bond strength after cyclic loading is not fully understood. PURPOSE: The purpose of this study was to investigate the influence of yttria-stabilized tetragonal zirconia polycrystal surface treatment on veneering porcelain shear bond strength and cyclic loading on the shear bond strength between the 2 materials. MATERIAL AND METHODS: A total of 48 cylinder-shaped yttria-stabilized tetragonal zirconia polycrystal specimens were fabricated with computer-aided design and computer-aided manufacturing (CAD/CAM), sintered for 8 hours at 1500°C, ground with 320-grit diamond paper, and divided into 4 groups (n = 12) according to surface treatment as follows: no treatment/control; heat treatment of 650°C to 1000°C at 55°C/min; airborne-particle abrasion with 50-μm alumina at 0...
December 2014: Journal of Prosthetic Dentistry
Anna Karina F Costa, Alexandre Luiz S Borges, Garry James P Fleming, Owen Addison
OBJECTIVES: Recently all-ceramic restorative systems have been introduced that use CAD/CAM technology to fabricate both the Y-TZP core and veneer-ceramic layers. The aim was to identify whether the CAD/CAM approach resulted in more favourable stressing patterns in the veneer-ceramic when compared with a conventionally sintered Y-TZP core/veneer-ceramic. METHODS: Nominally identical Vita VM9 veneer-ceramic disc-shaped specimens (0.7mm thickness, 12mm diameter) were fabricated...
October 2014: Journal of Dentistry
Bogna Stawarczyk, Marlis Eichberger, Rita Hoffmann, Falko Noack, Josef Schweiger, Daniel Edelhoff, Florian Beuer
OBJECTIVES: This study examined the metal-ceramic bond strength between different ceramics and a novel CAD/CAM base metal alloy as well as conventional CoCrMo alloys. METHODS: Three different base metal alloys were tested: a novel CAD/CAM milled and sintered alloy (MS), a. laser sintered alloy (LS), and a cast alloy (C). Specimens for the Schwickerath crack initiation test according to ISO 9693:2012 were prepared and veneered using the following veneering ceramics: i...
June 2014: Oral Health and Dental Management
Andrew C Johnson, Antheunis Versluis, Daranee Tantbirojn, Swati Ahuja
PURPOSE: To determine the effect of material type and restoration thickness on the fracture strength of posterior occlusal veneers made from computer-milled composite (Paradigm MZ100) and composite-ceramic (Lava Ultimate) materials. METHODS: 60 maxillary molars were prepared and restored with CAD/CAM occlusal veneer restorations fabricated from either Paradigm MZ100 or Lava Ultimate blocks at minimal occlusal thicknesses of 0.3, 0.6, and 1.0mm. Restorations were adhesively bonded and subjected to vertical compressive loading...
April 2014: Journal of Prosthodontic Research
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
Futoshi Komine, Kazuhisa Kobayashi, Markus B Blatz, Ryosuke Fushiki, Mai Koizuka, Kohei Taguchi, Hideo Matsumura
OBJECTIVE: The purpose of the present study was to evaluate the durability of bond strength between an indirect composite material and zirconia ceramics after thermocycling (100 000 cycles) and to assess the effect of various priming agents for zirconia surface treatments. MATERIALS AND METHODS: A CAD/CAM system (Katana, Noritake Dental Supply) was used to fabricate 96 zirconia disks as a bonding substrate. The specimens were randomly divided into six groups (n = 16) and treated with one of the following acidic priming agents: Alloy Primer (ALP, Kuraray), Clearfil Ceramic Primer (CCP, Kuraray), Clearfil Photo Bond (CPB, Kuraray), Clearfil Photo Bond with Clearfil Porcelain Bond Activator (CPB + Activator, Kuraray), Estenia Opaque Primer (EOP, Kuraray) and Porcelain Liner M Liquid A (PLA, Sun Medical)...
May 2013: Acta Odontologica Scandinavica
Nikoleta Skouridou, Sarah Pollington, Martin Rosentritt, Effrosyni Tsitrou
OBJECTIVES: To examine the strength and mode of fracture of traditionally and minimally prepared all-ceramic resin bonded CAD/CAM crowns after fatigue loading. METHODS: Thirty human maxillary molars were used and divided in three groups namely; traditional crown preparation group (I), minimal crown preparation group (II) and occlusal veneer preparation group (III). A leucite reinforced glass ceramic (IPS Empress CAD) was used for fabricating the crowns. The CEREC InEOS system (v3...
June 2013: Dental Materials: Official Publication of the Academy of Dental Materials
B Stawarczyk, A Trottmann, C H F Hämmerle, M Özcan
OBJECTIVES: The aims of this study were to test whether the bond strength of a hybrid composite and a PMMA-based veneer to CAD/CAM polymers would improve after pre-treatment and to evaluate the failure types after debonding. MATERIALS AND METHODS: Three types of PMMA-based (CAD-Temp, artBloc Temp and TelioCAD) CAD/CAM blocks were obtained (N = 360, n = 15 per test group). They were divided into four groups to be conditioned with the following methods: (a) no-treatment, (b) air-abrasion (50 μm Al2O3), (c) air-abrasion (50 μm Al2O3) + MPS-Silane (Monobond S) + Adhesive resin (StickResin) (for Gradia)/MMA (for Integral Esthetic Press) application, (d) Silica coating and silanization (CoJet-System)...
September 2013: Acta Odontologica Scandinavica
Yohsuke Taira, Tetsuro Odatsu, Takashi Sawase
PURPOSE: Titanium abutments and superstructures are commonly veneered or covered with esthetic materials. The present investigation was carried out to evaluate the effects of an experimental surface treatment using etchant and primer on bond strength between a resin composite and Ti-6Al-4V alloy. METHODS: Disk-shaped Ti-6Al-4V alloy was machine milled, the surface was air abraded with alumina, and the alloy was chemically etched with 5 wt% ammonium hydrogen fluoride (F-etch) for 30s...
January 2013: Journal of Prosthodontic Research
E Tsitrou, K N Tsangari
PURPOSE: To examine the performance of CAD/CAM all-ceramic resin-bonded bridges (RBBs) fabricated from a glass ceramic material, and determine the influence of two different preparation designs on the fracture strength of these prostheses. MATERIALS AND METHODS: Twenty human central incisors were used, placed into two groups. A clinical situation where a lateral incisor was missing was simulated. A minimal preparation design (palatal veneer preparation) and one that extended into the proximal area were applied in each group...
2012: International Journal of Computerized Dentistry
Thomas J Donnelly, F J Trevor Burke
Previous laboratory studies have demonstrated satisfactory fracture resistance of all-ceramic crowns placed using a resin-composite luting material and a dentine bonding system. This study investigated the fracture resistance of teeth restored using CAD/CAM technology, namely, Zirconia Based crowns and Cerec produced feldspathic porcelain crowns, both luted with a self adhesive resin luting material (RelyX Unicem Clicker 3M ESPE). Standardized preparations were carried out on two groups often sound, unrestored, maxillary premolar teeth...
September 2011: European Journal of Prosthodontics and Restorative Dentistry
Martin Rosentritt, Michael Behr, Christian Thaller, Heike Rudolph, Albert Feilzer
OBJECTIVE: To compare the fracture resistance and fracture performance of CAD/CAM zirconia and alloy crowns. METHOD AND MATERIALS: One electrophoretic deposition alumina ceramic (Wolceram, Wolceram) and 4 zirconia-based systems (ce.novation, ce.novation; Cercon, DeguDent; Digizon, Amann Girrbach; and Lava, 3M ESPE) were investigated. A porcelain-fused-to-metal method (Academy, Bego Medical) was used in either conventional casting technique or laser sintering. Sixteen crowns of each material were fabricated and veneered with glass-ceramic as recommended by the manufacturers...
September 2009: Quintessence International
Moustafa N Aboushelib, Marcel de Kler, Jef M van der Zel, Albert J Feilzer
PURPOSE: With state-of-the-art CAD/CAM technology, the fabrication of large and complex zirconia frameworks is just a click away. On the other hand, veneering of the frameworks is still operator-dependent. The aim of this work was to evaluate CAD veneering of zirconia restorations in terms of zirconia veneer bond strength and impact energy of fracture in a step towards complete automation of the fabrication process. MATERIALS AND METHODS: A new CAD/CAM system was used to fabricate a resin replica of the esthetic ceramic required to veneer a zirconia framework...
April 2009: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Moustafa N Aboushelib, Cornelis J Kleverlaan, Albert J Feilzer
PURPOSE: The introduction of yttrium partially stabilized zirconia polycrystals (Y-TZP) has pushed the application limits of all-ceramic restorations. The mechanical properties of these materials can be further improved by the addition of a secondary dopant phase. The aim of this work was to evaluate the properties of a new nano-composite ceramic used as a dental framework material. MATERIALS AND METHODS: The properties of a new ceria-stabilized tetragonal zirconia polycrystal co-doped with alumina (Ce-TZP-Al) were investigated...
October 2008: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Mohammed Zahran, Omar El-Mowafy, Laura Tam, Philip A Watson, Yoav Finer
PURPOSE: All-ceramic crowns are subject to fracture during function, especially in the posterior area. The use of yttrium-stabilized zirconium-oxide ceramic as a substructure for all-ceramic crowns to improve fracture resistance is unproven. The aim of this study was to compare fracture strength and fatigue resistance of new zirconium-oxide and feldspathic all-ceramic crowns made with computer-aided design/computer-aided manufacturing (CAD/CAM). MATERIALS AND METHODS: An ivorine molar was prepared to receive an all-ceramic crown...
July 2008: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Moustafa N Aboushelib, Cornelis J Kleverlaan, Albert J Feilzer
PURPOSE: The bond strength between veneer ceramic and the zirconia framework is the weakest component in the layered structure. This bond was proven to be sensitive to the surface finish of the framework material and to the type of the veneer ceramic and its method of application. New colored zirconia frameworks were introduced to enhance the final esthetics of the layered all-ceramic restoration. The aim of this study was to investigate the effect of zirconia type, white or colored, and its surface finish on the bond strength to two veneer ceramics...
July 2008: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Moustafa N Aboushelib, Niek de Jager, Cornelis J Kleverlaan, Albert J Feilzer
OBJECTIVES: The present study aims to evaluate the core-veneer bond strength and the cohesive strength of the components of three commercial layered all-ceramic systems. Two surface treatments for the core surface finish and different veneering ceramics with different thermal expansion coefficients (TEC) were applied. The selected systems were two CAD-CAM ceramics; Cercon and Vita Mark II and one pressable system; (IPS)Empress 2 for layering technique. METHODS: Standardized core specimens were fabricated according to the manufacturer's instructions, or polished with 1200 siliconcarbide polishing paper...
October 2005: Dental Materials: Official Publication of the Academy of Dental Materials
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