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dental porcelain

Abhishek Singh, Abhishek Nagpal, Salil Pawah, Chetan Pathak, Gaurav Issar, Pankaj Sharma
INTRODUCTION: In an attempt to minimize wear damage to the enamel of antagonist teeth, new low and medium fusing ceramic materials have been developed. Manufacturers usually claim that these ceramics are wear-friendly because of their lower hardness, lower concentrations of crystal phase, and smaller crystal sizes. This study aimed to quantitatively analyze the wear strength of various commercially available dental porcelain with tooth enamel as well as the surface hardness of these dental porcelain...
September 1, 2016: Journal of Contemporary Dental Practice
Márcia Borba, Maico D de Araújo, Karen A Fukushima, Humberto N Yoshimura, Jason A Griggs, Álvaro Della Bona, Paulo F Cesar
OBJECTIVE: To evaluate the effect of two aging methods (mechanical cycling and autoclave) on the mechanical behavior of veneer and framework ceramic specimens with different configurations (monolithic, two and three-layers). METHODS: Three ceramics used as framework for fixed dental prostheses (YZ-Vita In-Ceram YZ; IZ-Vita In-Ceram Zirconia; AL-Vita In-Ceram AL) and two veneering porcelains (VM7 and VM9) were studied. Bar-shaped specimens were produced in three different designs: monolithic, two layers (porcelain-framework) and three layers (porcelain-framework-porcelain)...
October 7, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
Tim Hilgenfeld, Marcel Prager, Franz Sebastian Schwindling, Alexander Heil, Stefan Kuchenbecker, Peter Rammelsberg, Martin Bendszus, Sabine Heiland
PURPOSE: MRI allows radiation-free imaging of the head and neck area. However, implant-supported prostheses may severely impair image quality due to artefacts. Therefore, identification of preferable material compositions for implants and supported prostheses with little impact on MR image quality is mandatory. MATERIALS AND METHODS: Overall, one zirconia and four titanium dental implants were provided with different single crown materials: porcelain-fused-to-metal precious alloy (GP-T), porcelain-fused-to-metal non-precious alloy (CCT-T), porcelain-fused-to-zirconia (ZC-T) and monolithic zirconia (Z-T, Z-Z)...
2016: European Journal of Oral Implantology
Terence A Imbery, Nicholas Diaz, Kristy Greenfield, Charles Janus, Al M Best
Preclinical fixed prosthodontics is taught by Department of Prosthodontics faculty members at Virginia Commonwealth University School of Dentistry; however, 86% of all clinical cases in academic year 2012 were staffed by faculty members from the Department of General Practice. The aims of this retrospective study were to quantify the quality of impressions, accuracy of laboratory work authorizations, and most common errors and to determine if there were differences between the rate of errors in cases supervised by the prosthodontists and the general dentists...
October 2016: Journal of Dental Education
Sonia K Makhija, Nathaniel C Lawson, Gregg H Gilbert, Mark S Litaker, Jocelyn A McClelland, David R Louis, Valeria V Gordan, Daniel J Pihlstrom, Cyril Meyerowitz, Rahma Mungia, Michael S McCracken
OBJECTIVES: Dentists enrolled in the National Dental Practice-Based Research Network completed a study questionnaire about techniques and materials used for single-unit crowns and an enrollment questionnaire about dentist/practice characteristics. The objectives were to quantify dentists' material recommendations and test the hypothesis that dentist's and practice's characteristics are significantly associated with these recommendations. METHODS: Surveyed dentists responded to a contextual scenario asking what material they would use for a single-unit crown on an anterior and posterior tooth...
September 28, 2016: Journal of Dentistry
Hee-Kyung Kim, Sung-Hun Kim, Jai-Bong Lee, Jung-Suk Han, In-Sung Yeo
Monolithic zirconia restorations increasingly have been used in dental practice in recent years and demonstrate superior mechanical performance compared with porcelain-veneered zirconia restorations. Recent advances in manufacturing technology have made possible the fabrication of translucent monolithic zirconia ceramics. This case report describes three clinical examples of monolithic zirconia fixed dental prostheses being used in the anterior and posterior regions and exhibiting acceptable esthetic results...
September 2016: International Journal of Prosthodontics
Christopher Wilson
When patients are constrained financially to receive dental work, a staged approach can be an effective way for enabling treatment to proceed. In this case, a patient who had been in the practice for about 10 years and had a severely worn and eroded dentition finally opted to receive treatment in stages. A systematic approach was used to determine the proper postoperative position of the teeth. The subsequent treatment plan included the use of porcelain onlays and full-coverage crowns in the mandibular posterior along with provisional direct composite restorations in the maxillary dentition; the composites would be transitioned to porcelain crowns as the patient's finances would allow...
September 2016: Compendium of Continuing Education in Dentistry
G R Oliver, C D Lynch, B L Chadwick, A Santini, N H F Wilson
Background Much concern appears to exist as to the scope and content of contemporary dental school programmes, with the oft-cited criticism being made that dental graduates are 'no longer as good as they used to be'.Aim The aim of this project was to survey the views of dentists - both new graduates and more established practitioners - on aspects of their own dental school training they felt had been deficient as well as commenting on what aspects of dental school education they would like to see improved/enhanced in current times...
August 26, 2016: British Dental Journal
Xiao-Zhuang Jin, Ehsan Homaei, Jukka Pekka Matinlinna, James Kit Hon Tsoi
OBJECTIVE: Numerous bond strength tests have been performed on dental adhesion experiments. Yet, the validity of these bond strength tests is controversial due to the name (e.g., "shear" or "tensile") may not reflect to the true and complete stress situation, i.e., assumed uniform shear or uniaxial tensile conditions. Thus, the aim of this study was to simulate and compare the stress distribution of and between shear bond strength (SBS), tensile bond strength (TBS), mold-enclosed shear bond strength (ME-SBS) and de novo lever-induced mold-enclosed shear bond strength (LIME-SBS) tests...
October 2016: Dental Materials: Official Publication of the Academy of Dental Materials
C Greene, J Wu, A H Rickard, C Xi
UNLABELLED: The human opportunistic pathogen, Acinetobacter baumannii, has the propensity to form biofilms and frequently cause medical device-related infections in hospitals. However, the physio-chemical properties of medical surfaces, in addition to bacterial surface properties, will affect colonization and biofilm development. The objective of this study was to compare the ability of A. baumannii to form biofilms on six different materials common to the hospital environment: glass, porcelain, stainless steel, rubber, polycarbonate plastic and polypropylene plastic...
October 2016: Letters in Applied Microbiology
Jason Hsuan-Yu Wang, Roy Judge, Denise Bailey
PURPOSE: The aim of this study was to describe and analyze the restoration profiles of 5,491 implant-supported single crowns, fixed partial dentures (FPDs), and splinted restorations prescribed between January 2005 and December 2009. MATERIALS AND METHODS: Dental clinicians qualified in or before December 2004, registered in Victoria, and placing and/or restoring implants in private practice were invited to participate in the study. Data was extracted by two trained and calibrated research assistants from dental records...
July 2016: International Journal of Prosthodontics
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
Morakot Piemjai, Mutlu Özcan, Franklin Garcia-Godoy, Nobuo Nakabayashi
This study evaluated the conditions of the non-invasive resin-bonded fixed dental prostheses (FDP) and patient satisfaction up to 10 years of clinical function. A total of 23 patients who required fixed prostheses in the areas of mandibular anterior and premolar, and maxillary anterior region received resin-bonded restorations between 1999-2003. In 13 patients with 14 edentulous areas were restored with an adhesive pontic (natural tooth, acrylic and porcelain). Two indirect proximal veneers using resin composite were placed in each space in 10 patients having 13 edentulous spaces...
June 2016: European Journal of Prosthodontics and Restorative Dentistry
S Kc Basnyat, B Sapkota, S Shrestha
Background Gingival inflammation and periodontal disease are the common complications of fixed dental prosthesis. They can be overcome by good oral hygiene maintenance. Objective The objective of this study was to assess the oral hygiene and gingival condition in patients after placement of fixed dental prosthesis for a period of six months. It was also analyzed how factors like type of fixed dental prosthesis (Single crown, fixed partial denture) and material (Metal, Porcelain fused to metal) are statistically associated with oral hygiene and gingival health...
October 2015: Kathmandu University Medical Journal (KUMJ)
Junichi Honda, Futoshi Komine, Shingo Kamio, Kohei Taguchi, Markus B Blatz, Hideo Matsumura
OBJECTIVES: The objective of this in vitro study was to investigate fracture loads of screw-retained zirconia-based molar restorations (hybrid abutment crown) fabricated with different restorative materials and designs. MATERIAL AND METHODS: Forty-four screw-retained zirconia-based molar restorations were fabricated on dental implants and divided into four groups (n = 11): porcelain-layered zirconia-based restorations (PLZ), indirect composite-layered zirconia-based restorations (ILZ), metal-ceramic restorations (MC), and monolithic zirconia restorations (MONO)...
July 13, 2016: Clinical Oral Implants Research
H Xia, F Xiong
Objective: To study clinical semi-permeability tolerance level in the field of dental restoration. Method: Vita 95 enamel porcelain powder was adopted and 6.0% used as the control transmissivity. Discoid porcelain plates with different transmissivity, namely increasing transmissivity (0.25%, 0.5%, 1.0%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4% and 4.5%) and decreasing transmissivity (-0.25%, -0.5%, -1.0%, -1.5%, -2%, -2.5%, -3% and -3.5%) were made. Forty observers judged these according to six grades: same, similar, slightly different, visibly different, recognizable and significantly different, and under the observation conditions of a neutral grey background and 45(°)/0(°) lighting...
April 18, 2016: West Indian Medical Journal
Jiantao Ye, Xiuhua Ye, Shaohai Chang, Lang Liu, Yiping Zhang, Shiyao Lin
The creation of a high bond strength between machined computer-manufactured pure titanium and porcelain remains problematic, and the effects of a silica coating on the bond strength of milled pure titanium bonded to dental porcelain require further investigation. The objective of this study was to evaluate the bond strength of machined pure titanium, with an intermediate coating of silica, to dental porcelain. In this work, 24 specimens of milled pure titanium were prepared and randomly divided into test and control groups, in which the test group was coated with silica using the sol-gel dipping technique...
July 8, 2016: European Journal of Oral Sciences
Gunilla Pousette Lundgren, Anette Wickström, Tove Hasselblad, Göran Dahllöf
Patients with Amelogenesis imperfecta (AI) can present with rapid tooth loss or fractures of enamel as well as alterations in enamel thickness, color, and shape; factors that may compromise aesthetic appearance and masticatory function. The aim was to explore the experiences and perceptions of adolescents and young adults living with AI and receiving early prosthetic therapy. Seven patients with severe AI aged 16 to 23 years who underwent porcelain crown therapy participated in one-to-one individual interviews...
2016: PloS One
Phoebus Tsaousoglou, Konstantinos Michalakis, Kiho Kang, Hans-Peter Weber, Anton Sculean
OBJECTIVE: To assess survival, as well as technical and biological complication rates of partial fixed dental prostheses (FDPs) supported by implants and teeth. METHOD: An electronic Medline search was conducted to identify articles, published in dental journals from January 1980 to August 2015, reporting on partial FDPs supported by implants and teeth. The search terms were categorized into four groups comprising the PICO question. Manual searches of published full-text articles and related reviews were also performed...
June 28, 2016: Clinical Oral Implants Research
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