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Ceramic thickness and bond strength

D P Lise, A Van Ende, J De Munck, Lcc Vieira, L N Baratieri, B Van Meerbeek
OBJECTIVES: To evaluate the effect of different surface treatments on the bond strength to a composite and a polymer-infiltrated ceramic CAD/CAM block after six-month artificial aging. METHODS AND MATERIALS: Two types of CAD/CAM blocks (Cerasmart, GC; Enamic, Vita Zahnfabrik) were cut in slabs of 4-mm thickness, divided into six groups, and subjected to the following surface treatments: group 1: no treatment; group 2: sandblasting (SB); group 3: SB + silane (Si); group 4: SB + Si + flowable composite (see below); group 5: 5% hydrofluoric acid etching (HF) + Si; and group 6: 37% phosphoric acid etching (H3PO4) + Si...
September 30, 2016: Operative Dentistry
Azamsadat Madani, Mohammadreza Nakhaei, Parisa Karami, Ghadir Rajabzadeh, Sahar Salehi, Hossein Bagheri
The aim of this in vitro study was to evaluate the effect of silica and aluminosilicate nanocomposite coating of zirconia-based dental ceramic by a sol-gel dip-coating technique on the bond strength of veneering porcelain to the yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) in vitro. Thirty Y-TZP blocks (10 mm ×10 mm ×3 mm) were prepared and were assigned to four experimental groups (n=10/group): C, without any further surface treatment as the control group; S, sandblasted using 110 μm alumina powder; Si, silica sol dip coating + calcination; and Si/Al, aluminosilicate sol dip coating + calcination...
2016: International Journal of Nanomedicine
Hongmei Wang, Qing Feng, Ning Li, Sheng Xu
STATEMENT OF PROBLEM: Limited information is available regarding the metal-ceramic bond strength of dental Co-Cr alloys fabricated by casting (CAST), computer numerical control (CNC) milling, and selective laser melting (SLM). PURPOSE: The purpose of this in vitro study was to evaluate the metal-ceramic bond characteristics of 3 dental Co-Cr alloys fabricated by casting, computer numerical control milling, and selective laser melting techniques using the 3-point bend test (International Organization for Standardization [ISO] standard 9693)...
July 23, 2016: Journal of Prosthetic Dentistry
Renato Roperto, Anna Akkus, Ozan Akkus, Lisa Lang, Manoel Damiao Sousa-Neto, Sorin Teich, Thiago Soares Porto
BACKGROUND: The aim of this study was to determine the microtensile bond strength (μTBS) of ceramic and composite computer aided design-computer aided manufacturing (CAD-CAM) blocks bonded to dentin using different adhesive strategies. MATERIALS AND METHODS: In this in vitro study, 30 crowns of sound freshly extracted human molars were sectioned horizontally 3 mm above the cementoenamel junction to produce flat dentin surfaces. Ceramic and composite CAD/CAM blocks, size 14, were sectioned into slices of 3 mm thick...
March 2016: Dental Research Journal
Dongwei Lu, Tao Zhang, Leo Gutierrez, Jun Ma, Jean-Philippe Croué
In this work, ceramic ultrafiltration membranes deposited with different metal oxides (i.e., TiO2, Fe2O3, MnO2, CuO, and CeO2) of around 10 nm in thickness and similar roughness were tested for O/W emulsion treatment. A distinct membrane fouling tendency was observed, which closely correlated to the properties of the filtration-layer metal oxides (i.e., surface hydroxyl groups, hydrophilicity, surface charge, and adhesion energy for oil droplets). Consistent with the distinct bond strength of the surface hydroxyl groups, hydrophilicity of these common metal oxides is quite different...
May 3, 2016: Environmental Science & Technology
Tatiana Cardona Giraldo, Vanessa Roldan Villada, Mauricio Peña Castillo, Osnara Maria Mongruel Gomes, Bruna Fortes Bittencourt, John Alexis Dominguez
The objective of this study was to evaluate the effect of passive or active phosphoric acid (PA) application after hydrofluoric acid (HA) treatment on the microshear bond strength of lithium disilicate. Thirty ceramic discs were made with IPS Emax 2 (10 mm thick and 10 mm diameter). The specimens were divided into 3 groups, A: 9.6% HA application; AF: 9.6% HA application + cleaning with 37% PA in passive mode and AFF: 9.6% HA application + cleaning with 37% PA in active mode. For the microshear test, four tygons (0...
January 2016: Brazilian Dental Journal
Neimar Sartori, Lais Dalmagro Peruchi, Jin-Ho Phark, Sillas Duarte
OBJECTIVES: To determine the effects of intrinsic wetness on the formation of dentin bonding interfaces of four resin cement systems bonded to dentin under different pulpal pressures. METHODS: Thirty-six freshly extracted third molars were selected and processed for dentin μTBS. The teeth were randomly assigned into 12 experimental groups, according to the adhesive luting system [Adper Single Bond Plus (3M ESPE) combined with two luting agents RelyX ARC (3M ESPE) and heated Filtek Z250 Universal Restorative (3M ESPE), Clearfil CD Bond (Kuraray) combined with Clearfil Esthetic Cement (Kuraray), and RelyX Unicem 2 Automix (3M ESPE)] and pulpal pressure (0, 5, and 20 cm of simulated pulpal pressure)...
May 2016: Journal of Dentistry
Isil Cekic-Nagas, Gulfem Ergun, Ferhan Egilmez, Pekka Kalevi Vallittu, Lippo Veli Juhana Lassila
PURPOSE: The aim of this study was to evaluate the effects of hydrofluoric acid treatment on bond strength of resin cements to three different types of ceramic/glass containing CAD-CAM block composite materials. METHODS: CAD-CAM block materials of polymer infiltrated (Vita Enamic), resin nanoceramic (Lava Ultimate) and nanoceramic (Cerasmart) with a thickness of 1.5mm were randomly divided into two groups according to the surface treatment performed. In Group 1, specimens were wet-ground with silicon carbide abrasive papers up to no...
March 10, 2016: Journal of Prosthodontic Research
A K Mainjot, N M Dupont, J C Oudkerk, T Y Dewael, M J Sadoun
Indirect composites have been undergoing an impressive evolution over the last few years. Specifically, recent developments in computer-aided design-computer-aided manufacturing (CAD-CAM) blocks have been associated with new polymerization modes, innovative microstructures, and different compositions. All these recent breakthroughs have introduced important gaps among the properties of the different materials. This critical state-of-the-art review analyzes the strengths and weaknesses of the different varieties of CAD-CAM composite materials, especially as compared with direct and artisanal indirect composites...
May 2016: Journal of Dental Research
Jian Yang, J Robert Kelly, Orville Bailey, Gary Fischman
STATEMENT OF PROBLEM: Titanium is widely used in implant dentistry because of its high strength, toughness, biocompatibility, and low cost. The fabrication of complex substructures is now possible with a number of automated systems. One major obstacle to broad clinical acceptance of porcelain-titanium prostheses is the poor ceramic-metal bonding. PURPOSE: The purpose of this study was to compare titanium bonding with a traditional bonder and a newly introduced titanium bonding system...
July 2016: Journal of Prosthetic Dentistry
María-Victoria Fuentes, Nuria Escribano, Bruno Baracco, Martin Romero, Laura Ceballos
BACKGROUND: No specific indications about the pre-treatment of indirect composite restorations is provided by the manufacturers of most self-adhesive resin cements. The potential effect of silane treatment to the bond strength of the complete tooth/indirect restoration complex is not available.The aim of this study was to determine the contribution of different surface treatments on microtensile bond strength of composite overlays to dentin using several self-adhesive resin cements and a total-etch one...
February 2016: Journal of Clinical and Experimental Dentistry
Guruprasada, N Rivankar, R K Dhiman, M Viswambaran
BACKGROUND: Conventionally HF acid has been used for etching ceramic veneer restorations before their cementation. Studies are lacking regarding the effectiveness of phosphoric acid as a substitute for HF acid for etching the ceramic veneers. The purpose of this study was to evaluate the effectiveness of surface preparation of porcelain laminate veneers using phosphoric acid, as compared to HF acid etching in providing the necessary surface roughness conducive to development of an effective bond between the ceramic laminate and the resin luting cement...
December 2015: Medical Journal, Armed Forces India
Ashraf Abdelfattah Khalil, Khalid Mohamed Abdelaziz
PURPOSE: To compare the push-out bond strength of feldspar and zirconia-based ceramic inlays bonded to dentin with different resin cements following simulated aging. MATERIALS AND METHODS: Occlusal cavities in 80 extracted molars were restored in 2 groups (n=40) with CAD/CAM feldspar (Vitablocs Trilux forte) (FP) and zirconia-based (Ceramill Zi) (ZR) ceramic inlays. The fabricated inlays were luted in 2 subgroups (n=20) with either etch-and-bond (RelyX Ultimate Clicker) (EB) or self-adhesive (RelyX Unicem Aplicap) (SA) resin cement...
December 2015: Journal of Advanced Prosthodontics
Hong Zhang, Ye Jing, Rongrong Nie, Xiangfeng Meng
OBJECTIVE: To evaluate the bond strength and durability of a self-adhesive resin cement with a zirconia ceramic pretreated by a zirconia primer. METHODS: Zirconia ceramic (Vita Inceram YZ) plates with a thickness of 2.5 mm were fired, polished, and then cleaned. Half of the polished ceramic plates were sandblasted with 50 μm alumina particles at 0.3 MPa for 20 s. The surface compound weight ratios were measured via X-ray fluorescence microscopy. The polished and sandblasted ceramic plates were directly bonded with self-adhesive resin cement (Biscem) or were pretreated by a zirconia primer (Z Primer Plus) before bonding with Biscem...
October 2015: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
Aurora Clark Dibner, J Robert Kelly
STATEMENT OF PROBLEM: Minimal evidence is available concerning the appropriate thickness of each layer in bilayered ceramic systems. PURPOSE: The purpose of this in vitro study was to examine the effect of core-veneer thickness ratios on the fatigue strength of a bonded bilayered ceramic system. MATERIAL AND METHODS: Specimens of Ivoclar Porcelain System (IPS) e.max lithium disilicate were fabricated with core/veneer thicknesses of 0.5/1.0 mm, 0...
March 2016: Journal of Prosthetic Dentistry
Mutlu Özcan, Alberto Noriyuki Kojima, Renato Sussumu Nishioka, Alfredo Mikail Melo Mesquita, Marco Antonio Bottino, Gilberto Duarte Filho
PURPOSE: In testing adhesion using shear bond test, a combination of shear and tensile forces occur at the interface, resulting in complex stresses. The jig designs used for this kind of test show variations in published studies, complicating direct comparison between studies. This study evaluated the effect of different jig designs on metal-ceramic bond strength and assessed the stress distribution at the interface using finite element analysis (FEA). MATERIALS AND METHODS: Metal-ceramic (Metal: Ni-Cr, Wiron 99, Bego; Ceramic: Vita Omega 900, Vita) specimens (N = 36) (diameter: 4 mm, veneer thickness: 4 mm; base diameter: 5 mm, thickness: 1 mm) were fabricated and randomly divided into three groups (n = 12 per group) to be tested using one of the following jig designs: (a) chisel (CH) (ISO 11405), (b) steel strip (SS), (c) piston (PI)...
October 5, 2015: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Xiao-Wei Ren, Li Zeng, Zi-Ming Wei, Xian-Zhen Xin, Bin Wei
STATEMENT OF PROBLEM: Selective laser melting (SLM) is a new technique for fabricating dental restorations, but the metal-ceramic bond strength of the restorations after multiple firings must be considered because adequate bond strength is a clinical requirement for long-term performance. PURPOSE: The purpose of this study was to investigate the effects of repeated firing on the metal-ceramic bond strength of an SLM Co-Cr alloy. MATERIAL AND METHODS: Thirty-six SLM-fabricated (Group SLM) and conventional lost wax cast (Group Cast) Co-Cr metal bars were prepared...
January 2016: Journal of Prosthetic Dentistry
Ariovaldo Stefani, Rui Barbosa Brito, Sidney Kina, Oswaldo Scopin Andrade, Gláucia Maria Bovi Ambrosano, Andreia Assis Carvalho, Marcelo Giannini
PURPOSE: To evaluate the influence of adhesive primers on the microshear bond strength of resin cements to zirconia ceramic. MATERIALS AND METHODS: Fifty zirconia plates (12 mm × 5 mm × 1.5 mm thick) of a commercially available zirconium oxide ceramic (ZirCad) were sintered, sandblasted with aluminum oxide particles, and cleaned ultrasonically before bonding. The plates were randomly divided into five groups of 10. Three resin cements were selected (RelyX ARC, Multilink Automix, Clearfil SA Cement self-adhesive resin cement), along with two primers (Metal-Zirconia Primer, Alloy Primer) and one control group...
July 2016: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
W U Park, S H Jung, Jingming Zhao, Kyu H Hwang, J K Lee, John C Mitchell
The metal-ceramic crown restoration was the most actively used at esthetic restoration for its convenience of forming. Due to constant rise of gold price, non-precious metal such as Ni-Cr alloy have been widely used as metal-ceramic restorations. For easy casting and lower melting point Be was added as minor component to Ni-Cr for a long time, but the use of Be was regulated to deteriorate to human lung. In this study, Ni-Cr specimens containing Be (T-3, Ticonium, USA) and non-Be (Bellabond Plus, BEGO, Germany) were fabricated and by heat treatments at 800-1050 0C oxide layer was formed for subsequent bonding to porcelain ceramics...
August 2015: Journal of Nanoscience and Nanotechnology
Yuka Kajima, Atsushi Takaichi, Tohru Yasue, Hisashi Doi, Hidekazu Takahashi, Takao Hanawa, Noriyuki Wakabayashi
The aim of this study was to investigate the bond strength of dental porcelain and the preheated Zr-14Nb alloy, and compare this strength with that of titanium. White oxide layers, which were predominantly composed of monoclinic zirconia, were formed on the preheated sample groups, and exhibited a greater roughness than the control samples. At the metal-ceramic interface, a greater Nb diffusion range was observed than in the control samples. The bond strengths of the samples subjected to 20min preheating treatment were the lowest (33...
January 2016: Journal of the Mechanical Behavior of Biomedical Materials
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