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dental ceramics

Adrian Bösch, Ronald Ernst Jung, Irena Sailer, Benic Goran, Christoph Hans Hämmerle, Daniel Stefan Thoma
The aim of this study was to compare customized zirconia and titanium abutments with respect to survival rates and technical, biologic, and esthetic outcomes. A total of 28 patients with single implants were randomly assigned to 12 customized zirconia (test, AC) and 16 customized titanium (control, MC) abutments. Technical, biologic, and esthetic outcomes were assessed after a mean follow-up time of 18 months. No biologic complications were observed, and no statistical difference for the bone-to-implant distance was found at 18 months (AC -0...
March 2018: International Journal of Periodontics & Restorative Dentistry
Suganthan Veerachamy, Pearlin Hameed, Dwaipayan Sen, Sitaram Dash, Geetha Manivasagam
Ceramic oxides such as alumina and zirconia are used to fabricate dental and orthopedic implants. However, their usage is limited as they fail due to low fracture toughness. To overcome this issue, ceramic coatings on metallic implants is attempted to have a combined effect of ceramics and metallic materials. This paper reports on the microstructure, phase analysis, mechanical properties, osseointegration and antibacterial activity of three different wear-resistant coatings developed on Ti-6Al-4V alloy which is used widely as orthopedic and dental implants...
July 1, 2018: Journal of Nanoscience and Nanotechnology
Yurdanur Uçar, İpek Aysan Meriç, Orhun Ekren
PURPOSE: To compare the fracture mechanics, microstructure, and elemental composition of lithography-based ceramic manufacturing with pressing and CAD/CAM. MATERIALS AND METHODS: Disc-shaped specimens (16 mm diameter, 1.2 mm thick) were used for mechanical testing (n = 10/group). Biaxial flexural strength of three groups (In-Ceram alumina [ICA], lithography-based alumina, ZirkonZahn) were determined using the "piston on 3-ball" technique as suggested in test Standard ISO-6872...
February 11, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
X Yan, H Lin
Cobalt-chromium alloys have been applied to dental porcelain fused to metal (PFM) restorations over the past decades owing to their excellent corrosion resistance, good biocompatibility and low price. The production of CoCr metal-ceramic restorations has always been based on traditional lost-wax casting techniques. However, in recent years, selective laser melting (SLM) is becoming more and more highly valued by dental laboratories and dental practitioners due to its individuation, precision and efficiency...
February 9, 2018: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
Burak Yilmaz, Faris A Alshahrani, Ediz Kale, William M Johnston
STATEMENT OF PROBLEM: Veneering with porcelain may adversely affect the marginal fit of long-span computer-aided design and computer-aided manufacturing (CAD-CAM) implant-supported fixed prostheses. Moreover, data regarding the precision of fit of CAD-CAM-fabricated implant-supported complete zirconia fixed dental prostheses (FDPs) before and after porcelain layering are limited. PURPOSE: The purpose of this in vitro study was to evaluate the effect of porcelain layering on the marginal fit of CAD-CAM-fabricated complete-arch implant-supported, screw-retained FDPs with presintered zirconia frameworks compared with titanium...
February 6, 2018: Journal of Prosthetic Dentistry
Niwut Juntavee, Apa Juntavee, Phuwiwat Saensutthawijit
AIM: This study evaluated the effect of light-emitting diode (LED) illumination bleaching technique on the surface nanohardness of various computer-aided design and computer-aided manufacturing (CAD/CAM) ceramic materials. MATERIALS AND METHODS: Twenty disk-shaped samples (width, length, and thickness = 10, 15, and 2 mm) were prepared from each of the ceramic materials for CAD/CAM, including Lava™ Ultimate (LV), Vita Enamic® (En) IPS e.max® CAD (Me), inCoris® TZI (IC), and Prettau® zirconia (Pr)...
February 1, 2018: Journal of Contemporary Dental Practice
Alex M Muruppel, Joyce Thomas, Sudeep Saratchandran, Dinesh Nair, Sheeba Gladstone, Milen M Rajeev
AIM: This in vitro study evaluated the resistance form of die preparations for all ceramic restorations and, thereby, explored the concept of effective taper and its correlation between the ideal in theory and actual in the clinical situation by analyzing the digital images of the die preparations. MATERIALS AND METHODS: Scanned digital images of 114 die preparations for all ceramic restorations (n = 114) were collected from a dental laboratory. All the images were also analyzed digitally using Adobe Photoshop® software to analyze the degree of taper (angle of convergence) of each preparation and then applied the Zuckerman's circle, and the Lewis perpendicular methods were used to measure the resistance form...
February 1, 2018: Journal of Contemporary Dental Practice
Keiichi Yoshida
OBJECTIVE: The aim of this study was to investigate the influence of different cleaning methods on the shear bond strengths of 2 resin cements to saliva-contaminated zirconia. METHODS: After saliva contamination, alumina-blasted zirconia specimens were cleaned with 1 of 5 methods of water-rinsing (SA), K-etchant GEL phosphoric acid (PA), Ivoclean (IC), AD Gel (ADG), or additional alumina-blasting (AB). Alumina-blasted zirconia without saliva contamination was used as control group (Cont)...
February 8, 2018: Journal of Esthetic and Restorative Dentistry
Rubén Agustín-Panadero, Daniel Ausina-Escrihuela, Lucía Fernández-Estevan, Juan-Luis Román-Rodríguez, Joan Faus-López, María-Fernanda Solá-Ruíz
Recent years have seen increasing demand for treatments aimed at improving dental esthetics. In this context, both patients and dentists prefer to preserve dental structures as far as possible; thanks to technological advances, especially in adhesive dentistry, new materials and minimally invasive techniques such as "no-prep" (no preparation) veneers have made this possible. Nevertheless, no-prep veneers have specific indications and suffer certain disadvantages. OBJECTIVES: This clinical case describes the rehabilitation of the upper anterior region by means of no-prep veneers, with BOPT (Biologically Oriented Preparation Technique) cervical margins...
December 2017: Journal of Clinical and Experimental Dentistry
Valentyn Skalskyi, Valentyn Makeev, Olena Stankevych, Roman Pavlychko
OBJECTIVE: The study aims at comparing the fracture resistance of different restorative materials used in dental endocrown restorations and respective endocrown restorations under a quasi-static compressive load using acoustic emission (AE) method. METHODS: Five restorative materials were used in this study. The restorative materials were manufactured into discs 13mm in diameter and 5mm thick, which were then divided into 5 groups and included into Type 1: Group B: zirconium dioxide (Prettau zirconia); Group C: ceramics (IPS e...
February 3, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
M Naumann, M von Stein-Lausnitz, M Rosentritt, C Walter, H Meyer-Lückel, G Sterzenbach
OBJECTIVES: The aim of this in vitro study was an analysis of the impact of simulated reduced alveolar bone support and post-restored, endodontically treated distal abutment tooth on load capability of all-ceramic zirconia-based cantilever-fixed dental prosthesis (CFDP). MATERIAL AND METHODS: The roots of human lower sound premolars (n = 80) were divided into five experimental groups to be restored with all-ceramic zirconia-supported three-unit CFDP regarding bone loss (BL) relative to the cement-enamel junction (CEJ): 2 mm below CEJ = 0% BL (control group), group 25% distal BL, group 50% distal BL, group 50% mesial and distal BL, and group 50% distal BL and adhesive post-supported restoration...
February 6, 2018: Clinical Oral Investigations
Sadia Nasrin, Noriko Katsube, Robert R Seghi, Stanislav I Rokhlin
OBJECTIVES: The objective is to establish an approximate relative fatigue life estimation method under simulated mastication load for thin-walled monolithic restorations. METHODS: Experimentally measured fatigue parameters of fluormica, leucite, lithium disilicate and yttrium-stabilized zirconia in the existing literature were expressed in terms of the maximum cyclic stress and stress corresponding to initial crack size prior to N number of loading cycles to assess their differences...
February 2, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
Júlia Cadorim Facenda, Marcia Borba, Pedro Henrique Corazza
OBJECTIVES: Ceramics and composites are the most used materials for dental application. Recently, the characteristics of both were combined on the called "polymer-infiltrated ceramic-network" (PICN). The aim of this review is to report the behavior of PICN, comparing the findings that may support the correct clinical application. OVERVIEW: The PICN material is a structure with a sintered ceramic matrix infiltrated with a polymer matrix. Studies evaluated this material microstructure and composition, mechanical properties and adhesive behavior...
February 5, 2018: Journal of Esthetic and Restorative Dentistry
Asha Ramesh, Sheethalan Ravi, Gurumoorthy Kaarthikeyan
Generalized aggressive periodontitis (GAP) is a debilitating form of the disease and it results in deteriorating effects on the esthetic and functional aspects of the oral cavity. This case report describes the comprehensive rehabilitation of GAP patient using dental implants. The treatment planning involved thorough scaling and root planning (SRP) with oral hygiene instructions. The patient was motivated to adhere to a strict oral hygiene regimen following which periodontal flap surgery employing guided tissue regeneration and bone grafts was performed...
March 2017: Journal of Indian Society of Periodontology
Miquel Turon-Vinas, Marc Anglada
OBJECTIVE: The aim of the paper is to determine and discuss the correlation between the fracture toughness and the fracture stress in zirconia transforming ceramics with a small artificial crack. As an R-curve behaviour is usually present in transforming ceramics for both small and long cracks, predictions of the fracture stress can only be done with an accurate knowledge of the R-curve and crack dimensions. METHODS: First, basic concepts of fracture mechanics, strength and testing of ceramic materials are introduced...
January 21, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
Sivaranjani Gali, Ravikumar K, B V S Murthy, Bikramjit Basu
OBJECTIVE: The objective of the present study is to understand the role of yttria stabilized zirconia (YSZ) in achieving the desired spectrum of clinically relevant mechanical properties (hardness, elastic modulus, fracture toughness and brittleness index) and chemical solubility of mica glass ceramics. METHODS: The glass-zirconia mixtures with varying amounts of YSZ (0, 5, 10, 15 and 20wt.%) were ball milled, compacted and sintered to obtain pellets of glass ceramic-YSZ composites...
January 29, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
Chandur P K Wadhwani, Todd Schoenbaum, Kirk E King, Kwok-Hung Chung
Due to their exceptional biological and mechanical properties, titanium and its alloys are commonly used in both dental implants and implant abutments, upon which prostheses can be attached. The gray color of titanium metal, however, can elicit esthetic problems, as it has the potential to show through a translucent ceramic restorative material. Various solutions have been proposed and used to attempt to overcome esthetic issues associated with titanium. This article describes a simple, economical technique to color titanium abutments and components utilizing anodization, resulting in light reflection and color enhancement through a natural physics phenomenon known as light interference patterns...
February 2018: Compendium of Continuing Education in Dentistry
Carlo Fornaini, Federica Poli, Elisabetta Merigo, Nathalie Brulat-Bouchard, Ahmed El Gamal, Jean-Paul Rocca, Stefano Selleri, Annamaria Cucinotta
Lithium disilicate dental ceramic bonding, realized by using different resins, is strictly dependent on micro-mechanical retention and chemical adhesion. The aim of this in vitro study was to investigate the capability of a 1070 nm fiber laser for their surface treatment. Samples were irradiated by a pulsed fiber laser at 1070 nm with different parameters (peak power of 5, 7.5 and 10 kW, repetition rate (RR) 20 kHz, speed of 10 and 50 mm/s, and total energy density from 1.3 to 27 kW/cm²) and the thermal elevation during the experiment was recorded by a fiber Bragg grating (FBG) temperature sensor...
January 31, 2018: Bioengineering
Kim Kniha, Karl Andreas Schlegel, Heinz Kniha, Ali Modabber, Friedrich Neukam, Kristian Kniha
PURPOSE: Soft tissue interactions with ceramic dental implants have previously been shown to have favorable esthetic outcomes. This study aimed to evaluate the papilla-crown proportion around zirconia implants in a 3-year follow-up study and the correlation between the gingival biotype and changes in papillary height. MATERIALS AND METHODS: This was a prospective study of 39 patients with 40 single-gap implants (Straumann PURE Ceramic ZLA Implant). The papilla-crown proportion was assessed after 3 months, 1 year, and 3 years...
January 28, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Alexandra Șoim, Maria Strîmbu, Alexandru V Burde, Bogdan Culic, Diana Dudea, Cristina Gasparik
OBJECTIVES: To assess the translucency of two pressable ceramics and to analyze their masking property when placed on different tooth-shaded backgrounds. MATERIALS AND METHODS: Thirty discs (1-mm thickness) were fabricated using two pressable ceramics (shade/translucency): 1M1T/HT, 1M2T/HT, 2M2T (VITA PM9), and A1LT/HT, B1LT/HT, A2LT (e.max Press). Color measurements of discs were performed with a dental spectrophotometer on tooth-colored backgrounds (A1/A2/A3/A3...
January 25, 2018: Journal of Esthetic and Restorative Dentistry
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