Academic literature on the topic 'Goss porcelain'

I write to raise some issues involved in the blatant destruction of teeth, apparently being undertaken to cure patients affected by ‘porcelain deficiency disease’ (PDD). This is a newish disease, identified by some dentists who also seem to think that teeth suffer from ‘hyperenamelosis’ (an excess of enamel). It probably goes without saying that both of these conditions are imaginary yet it does appear to me, at times, that they are perceived to exist by some ‘cosmetic’ dentists. In this article I offer comments and case studies of patients who, arguably, have had unnecessarily aggressive treatment that was probably of more benefit to the profits of the dentists concerned than to the patients’ long-term dental health.

The friction and wear behavior of dental ceramics (Vita VMK95) against uniform Si3N4 balls has been investigated using a small amplitude reciprocating apparatus under simulated oral conditions. The variables of ball radii (2mm, 6 mm, 13mm, and 21mm), load (10N, 20N, 30N, and 40N), reciprocating amplitude (200(m), frequency (2Hz) and use of artificial saliva lubrication or no lubrication were selected. Tests lasting up to 10,000 cycles were conducted. The wear scars of the samples were characterized with 3-D con focused laser-scanning microscope. The wear depths were analyzed statistically. The correlations between the wear behaviors and antagonist radii were also compared. The results show the friction coefficient of dental porcelain goes up with the decreasing of antagonist radii, and the wear depth decreases with the antagonist diameters. Load and lubrication effect is significant for friction coefficient and wear depth. The friction and wear mechanism of dental ceramics was characterized by abrasive wear and delaminating.

The collection of the West Bohemian Museum in Pilsen includes significant examples of artworks and decorative arts from Asia. The history of this collection dates back to the last quarter of the 19th century, when these items were a part of a collection of the West Bohemian Museum of Decorative Arts in Pilsen. The first director of the museum, architect Josef Škorpil (1856–1931), contributed to the creation of the decorative arts collection and the acquisition of objects from the Far and Middle East. Thanks to its acquisition activities throughout Europe, a significant decorative arts collection was established in Pilsen. Its importance goes beyond the Pilsen region. The concept of creating this collection was in accordance with the emergence of decorative arts museums in Europe. The collection, together with the Asian objects, was presented to the public as a part of an exposition opened in 1913. Today, the Asian collection consists of Chinese and Korean objects, mainly ceramics and porcelain, as well as exceptionally well-preserved textiles from the late Qing Dynasty. The Japanese portable Buddhist altar zushi or a set of Japanese woodblock prints of the ukiyo-e style are among the most unique acquisitions. A relatively modest set of items from the Middle East includes typical examples of decorative arts from Iran, Turkey or Syria. The objects are still a popular subject of research and have also become a part of the new decorative arts permanent exhibition of the museum that was opened in 2017.

Glodok sub district is known as a Chinatown in Jakarta. The population in Glodok sub district are dominated by craftsmen of chinese arts, such as lion dance, liong, chinese calligraphy, chinese decorations, porcelain crafts, chinese music, chinese traditional clothes, and also various kinds of homemade chinese traditional food. The chinese art crafted are charity and worship to the gods. This Chinese traditional craftsman are unprofitable community. The goals of this project is for supporting the survival of this Chinese arts community. These communities needs facilities in order to get more attention from residents in Glodok sub district and greater. The idea of the program for this project is one stop cultural center concept, where this place can become a cultural place, exhibition, and recreation center for Glodok residents and the surroundings. In this project visitors can make, exhibit, and display the product and performance of the Chinese traditional art. In this place is possible to make a competition between each of traditional chinese art organization, for supporting the existence of each traditional Chinese art community. The product can be sold as commercial Chinese art works. The design method of this project are inspired by Tulou building in Fujian China, and has been modified according to the context of the city prevailing in the Glodok region. Abstrak Glodok dikenal sebagai pecinan di Jakarta, Mayoritas penduduk nya adalah kaum Tionghoa. Di kawasan Glodok ini didominasi oleh para pengerajin kesenian khas Tionghoa, seperti barongsai, liong, kaligrafi China, lukisan khas Tionghoa, kerajinan keramik, kesenian musik khas Tionghoa, pengerajin baju tradisional Tionghoa , dan juga banyak pabrik makanan tradisional China dalam skala rumahan. Mayoritas pengerajin seni adalah kaum lansia, karena mengerajin kesenian ini sudah menjadi bagian dari kehidupan berderma atau berbakti kepada Sang Pencipta dan juga kepada leluhur mereka, komunitas pengerajin seni ini adalah berbasis amal/tidak mengambil keuntungan. Oleh karena itu tujuan dari proyek ini adalah untuk menjaga keberlangsungan dari komunitas kesenian khas Tionghoa ini. Agar komunitas ini tetap mendapat pengakuan maka dibutuhkan sebuah wadah yang dapat mengelola komunitas ini agar lebih mendapat banyak perhatian dari penduduk di kawasan Glodok ini. Ide dari program yang direncanakan dalam proyek ini adalah menganut konsep dari hulu ke hilir, dimana di tempat ini dapat menjadi pusat budaya,pertunjukan dan rekreasi bagi penduduk Glodok dan sekitarnya. Hal ini diwujudkan dari program dalam proyek ini yang mulai dari pembuatan, memamerkan dan menampilkan hasil dari kesenian khas China ini, kemudian sampai pada akhir nya dapat diperlombakan dan dapat menjadi produk kerajinan seni secara komersil. Metode perancangan dan desain proyek ini mengambil inspirasi dari bangunan Tulou di Fujian, China yang kemudian di modifikasi lagi sesuai dengan konteks kota yang berlaku di kawasan Glodok.

As reforçadas propriedades intrínsecas dos materiais cerâmicos, associados à adesão resinosa fundamentam a desenvoltura de técnicas restauradoras mais simplificadas, conservadoras e sem a necessidade de preparo dental prévio seja em dentição anterior ou posterior. Assim sendo, o trabalho tem como objetivo apresentar dois casos clínicos os quais abordaram a confecção de restaurações delgadas em dissilicato de lítio cimentadas sobre diferentes áreas dos arcos dentários, enfatizando o mesmo protocolo clínico, ou seja, ausência de preparos dentais e consequentemente a cimentação resinosa adesiva das restaurações. Caso Clínico 1: laminados cerâmicos nos elementos 13, 12, 11, 21, 22 e 23; Caso Clínico 2: facetas delgadas sobre os elementos 34, 35, 36 e 37. Ambos os casos clínicos com 1 ano de acompanhamento após a cimentação das restaurações. Conclui-se que houve a recuperação da estética e da função em ambos os casos apresentados e a confiabilidade e o sucesso em longo prazo do protocolo clínico descrito estão diretamente relacionados ao substrato dentário, aos fatores de adesividade dos materiais e as propriedades intrínsecas das cerâmicas.Descritores: Cerâmica; Estética Dentária; Facetas Dentárias; Cimentos de Resina.ReferênciasMurdoch-Kinch CA, McLean ME. Minimally invasive dentistry. J Am Dent Assoc. 2003;134(1):87-95.Ericson D. The concept of minimally invasive dentistry. Dent Update. 2007;34(1):9-10,12-4,17-8.Beier US, Kapferer I, Burtscher D, Dumfahrt H. Clinical performance of porcelain laminate veneers for up to 20 years. Int J Prosthodont. 2012;25(1):79-85.D'Arcangelo C, Vadini M, D'Amario M, Chiavaroli Z, De Angelis F. Protocol for a new concept of no-prep ultrathin ceramic veneers. J Esthet Restor Dent. 2018;30(3):173-79.Vadini M, D'Amario M, De Angelis F, Falco A, D'Arcangelo C. No-prep rehabilitation of fractured maxillary incisors with partial veneers. J Esthet Restor Dent. 2016;28(6):351-58.Molina IC, Molina GC, Stanley K, Lago C, Xavier CF, Volpato CA. Partial-prep bonded restorations in the anterior dentition: long-term gingival health and predictability. A case report. Quintessence Int. 2016;47(1):9-16.Kelly JR, Benetti P. Ceramic materials in dentistry: historical evolution and current practice. Aust Dent J. 2011;56(Suppl 1):84-96.Edelhoff D, Brix O. All-ceramic restorations in different indications: a case series. J Am Dent Assoc. 2011;142(Suppl 2):14S-9S.Miranda ME, Olivieri KA, Rigolin FJ, Basting RT. Ceramic fragments and metal-free full crowns: a conservative esthetic option for closing diastemas and rehabilitating smiles. Oper Dent. 2013;38(6):567-71.Cortellini D, Canale A. Bonding lithium disilicate ceramic to feather-edge tooth preparations: a minimally invasive treatment concept. J Adhes Dent. 2012;14(1):7-10.Wolfart S, Eschbach S, Scherrer S, Kern M. Clinical outcome of three-unit lithium-disilicate glass-ceramic fixed dental prostheses: up to 8 years results. Dent Mater. 2009;25(9):e63-71.Benetti P, Della Bona A, Kelly JR. Evaluation of thermal compatibility between core and veneer dental ceramics using shear bond strength test and contact angle measurement. Dent Mater. 2010;26(8):743-50.Beier US, Kapferer I, Dumfahrt H. Clinical long-term evaluation and failure characteristics of 1,335 all-ceramic restorations. Int J Prosthodont. 2012;25(1):70-8.Veneziani M. Ceramic laminate veneers: clinical procedures with a multidisciplinary approach. Int J Esthet Dent. 2017;12(4):426-48.Anchieta RB, Rocha EP, de Almeida EO, Junior AC, Martini AP. Bonding all-ceramic restorations with two resins cement techniques: a clinical report of three-year follow-up. Eur J Dent. 2011;5(4):478-85.Peumans M, Van Meerbeek B, Lambrechts P, Vanherle G. Porcelain veneers: a review of the literature. J Dent. 2000;28(3):163-77.Barkmeier WW, Erickson RL, Kimmes NS, Latta MA, Wilwerding TM. Effect of enamel etching time on roughness and bond strength. Oper Dent. 2009;34(2):217-22.Esquivel-Upshaw J, Rose W, Oliveira E, Yang M, Clark AE, Anusavice K. Randomized, controlled clinical trial of bilayer ceramic and metal-ceramic crown performance. J Prosthodont. 2013;22(3):166-73.Martin AJ, Buschang PH, Boley JC, Taylor RW, McKinney TW. The impact of buccal corridors on smile attractiveness. Eur J Orthod. 2007;29(5):530-7.Fradeani M. Evaluation of dentolabial parameters as part of a comprehensive esthetic analysis. Eur J Esthet Dent. 2006;1(1):62-9.Borges GA, Sophr AM, de Goes MF, Sobrinho LC, Chan DC. Effect of etching and airborne particle abrasion on the microstructure of different dental ceramics. J Prosthet Dent. 2003;89(5):479-88.Fabianelli A, Goracci C, Bertelli E, Davidson CL, Ferrari M. A clinical trial of Empress II porcelain inlays luted to vital teeth with a dual-curing adhesive system and a self-curing resin cement. J Adhes Dent. 2006;8(6):427-31.Aykor A, Ozel E. Five-year clinical evaluation of 300 teeth restored with porcelain laminate veneers using total-etch and a modified self-etch adhesive system. Oper Dent. 2009;34(5):516-23.Oztürk E, Hickel R, Bolay S, Ilie N. Micromechanical properties of veneer luting resins after curing through ceramics. Clin Oral Investig. 2012;16(1):139-46.Scherrer SS, de Rijk WG, Belser UC, Meyer JM. Effect of cement film thickness on the fracture resistance of a machinable glass-ceramic. Dent Mater. 1994;10(3):172-77.Gresnigt M, Ozcan M. Esthetic rehabilitation of anterior teeth with porcelain laminates and sectional veneers. J Can Dent Assoc. 2011;77:b143.Friedman MJ. A 15-year review of porcelain veneer failure--a clinician's observations. Compend Contin Educ Dent. 1998;19(6):625-8,630,632 passim;quiz 638.Peumans M, De Munck J, Fieuws S, Lambrechts P, Vanherle G, Van Meerbeek B. A prospective ten-year clinical trial of porcelain veneers. J Adhes Dent. 2004;6(1):65-76.Fradeani M, Redemagni M, Corrado M. Porcelain laminate veneers: 6- to 12-year clinical evaluation--a retrospective study. Int J Periodontics Restorative Dent. 2005;25(1):9-17.De Munck J, Van Landuyt K, Peumans M, Poitevin A, Lambrechts P, Braem M et al. A critical review of the durability of adhesion to tooth tissue:methods and results. J Dent Res. 2005;84(2):118-32.

The article discusses the patterns in the market positioning of various energy technologies and identifies technological developments that are residing in the early stages of the market maturity cycle. The study is based on the use of the Hype Cycle conceptual platform and methods of cluster and classification analysis, the functionality of which is implemented using the Mclust software package from the realm of the programming language R. The information on patent and publication activity presented in global search engines Google Patents and Google Scholar has served as the informational basis for the analytical procedures conducted. The main provisions of the study were tested on the example of transformers for a voltage of 220 kV. For this technological development, its critical structural elements are identified, including heat exchangers with forced circulation of oil (air), oil-air coolers, on-load tap-changers, bushings with the main insulation of the porcelain tire, and bushings with gas insulation, each of which is analyzed from the point of view of existing patterns of its positioning on the Hype Cycle. It has been established that most of these structural elements are within the framework of the “slope of enlightenment” and “plateau of productivity” phases, which characterizes the energy technology under study as already established one, which, in combination of its characteristics, goes beyond the developments of an innovative profile.

Introduction: Today the aesthetic demand in dentistry occupies the first places in terms of consultation needs in the dental office, that is why, as providers of dental health services, we are obliged to offer treatment options that meet standards of quality, functionality, aesthetics, predictability among other things and that are available to different social levels4. There are techniques that supported by elements such as Digital Smile Design (DSD) 9, wax up and mockup5 offer excellent, predictable aesthetic results, with the option of choosing different materials that are available to all our patients from composite resin to better than we find today; the porcelain clinical case: A 25-year-old female patient who goes to a dental office for teeth whitening, when diagnosing the case, the presence of diastema was observed in the upper centers, as well as anomalies regarding aesthetic smile parameters such as pigmentation, proportions , incisal edge line, among other things. Diagnostic waxing, mockup and photographs were performed to evaluate the result. The treatment plan consisted of 6 resin veneers made with the fluid resin injection technique through a transparent silicone matrix (Flow injection technique). RESULTS: The prognosis of the case is considered favorable, taking into account that the treatment with Resins is not definitive, however functional and aesthetic results were achieved properly. Conclusions: There are several treatment alternatives for the solution of aesthetic problems, which adapt to the possibilities of each patient, the mockup is a necessary tool for obtaining predictable treatments. The fluid resin injection technique is a good aesthetic and functional treatment, which sometimes does not require the minimum wear of the teeth to be treated.

Archaeological ceramics refers to products made primarily of clay and containing variable amounts of lithic and other materials as well. The term ceramic is derived from the Greek keramos, which has been translated as "earthenware" or "burned stuff." Ceramics include products that have been fired, primarily pottery but also brick, tile, glass, plaster, and cement as well. Since pottery is by far the most important archaeologically, and the methods of sampling and study are largely applicable to the others, this chapter is devoted primarily to pottery. Pottery then is the general term used here for artifacts made entirely or largely of clay and hardened by heat. Today, a distinction is sometimes made between pottery, applied to lower-quality ceramic wares, and the higher-grade product porcelain. No such distinction will be made here, so the term pottery alone will be used. Raw material that goes into the making of a pot includes primarily clay, but also varying amounts of temper, which is added to make the material more manageable and to help preserve the worked shape of the pot during firing. Of primary interest in ceramic studies are 1. the nature and the source of the raw materials—clays, temper, and slip (applied surface pigment)—and a reconstruction of the working methods of ancient potters; 2. the physical properties of the raw materials, from their preparation as a clay-temper body through their transformations during manufacture into a final ceramic product; 3. the nature of the chemical and mineral reactions that take place during firing as a clue to the technology available to the potter; and 4. the uses, provenance, and trade of the wares produced. Much of the information needed to answer these questions is available through standard geochemical and petrographic analysis of ceramic artifacts. Insight into the working methods of ancient potters also has been obtained through ethnographic studies of cultures where, because of isolation or conservative traditions or both, ancient methods have been preserved.