Journal ArticleDOI
Biocompatibility of dental casting alloys: a review.
TLDR
To minimize biologic risks, dentists should select alloys that have the lowest release of elements (lowest corrosion).Abstract:
Statement Of Problem. Dental casting alloys are widely used in applications that place them into contact with oral tissues for many years. With the development of new dental alloys over the past 15 years, many questions remain about their biologic safety. Practitioners must choose among hundreds of alloy compositions, often without regard to biologic properties. Purpose. This article is an evidence-based tutorial for clinicians. Concepts and current issues relevant to the biologic effects of dental casting alloys are presented. Summary. The single most relevant property of a casting alloy to its biologic safety is its corrosion. Systemic and local toxicity, allergy, and carcinogenicity all result from elements in the alloy being released into the mouth during corrosion. Little evidence supports concerns of casting alloys causing systemic toxicity. The occurrence of local toxic effects (adjacent to the alloy) is not well documented, but is a higher risk, primarily because local tissues are exposed to much higher concentrations of released metal ions. Several elements such as nickel and cobalt have relatively high potential to cause allergy, but the true risk of using alloys containing these elements remains undefined. Prudence dictates that alloys containing these elements be avoided if possible. Several elements in casting alloys are known mutagens, and a few such as beryllium and cadmium are known carcinogens in different chemical forms. Despite these facts, carcinogenic effects from dental casting alloys have not been demonstrated. Prudent practitioners should avoid alloys containing these known carcinogens. Conclusion. To minimize biologic risks, dentists should select alloys that have the lowest release of elements (lowest corrosion). This goal can be achieved by using high-noble or noble alloys with single-phase microstructures. However, there are exceptions to this generality, and selection of an alloy should be made on a case-by-case basis using corrosion and biologic data from dental manufacturers. (J Prosthet Dent 2000;83:223-34.)read more
Citations
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Journal ArticleDOI
Corrosion and surface modification on biocompatible metals: A review.
R.I.M. Asri,Wan Sharuzi Wan Harun,Mahendran Samykano,Nurul Akmal Che Lah,Saiful Anwar Che Ghani,Faris Tarlochan,Muhammad Rafi Raza +6 more
TL;DR: This article focuses on biocompatible metals which favorably used as implants such as 316L stainless steel, cobalt-chromium-molybdenum, pure titanium and titanium-based alloys, and the mechanism to improve it.
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Alloys for prosthodontic restorations.
TL;DR: A brief historical look at prosthodontic alloys and the nomenclature for alloys is followed by a discussion of the most important physical properties of alloys for clinical practice, and speculations about future trends forAlloys are made.
Journal ArticleDOI
Mg-Zr-Sr alloys as biodegradable implant materials.
Yuncang Li,Cuie Wen,Dolly Mushahary,Ragamouni Sravanthi,Nemani Harishankar,Gopal Pande,Peter Hodgson +6 more
TL;DR: It is demonstrated that Mg-xZr-ySr alloys with x and y ≤5 wt.% would make excellent biodegradable implant materials for load-bearing applications.
Journal ArticleDOI
A review of hydroxyapatite-based coating techniques: Sol-gel and electrochemical depositions on biocompatible metals.
TL;DR: The review shows that sol-gel dip coatings and electrochemical deposition were able to obtain the uniform and homogeneous coating thickness and high adherent biocompatible coatings even in complex shapes.
Journal ArticleDOI
In vitro biocompatibility of CoCrMo dental alloys fabricated by selective laser melting
Yolanda Hedberg,Yolanda Hedberg,Bin Qian,Zhijian Shen,Sannakaisa Virtanen,Inger Odnevall Wallinder +5 more
TL;DR: This study shows that integrative and interdisciplinary studies of microstructural characteristics, corrosion, and metal release are essential to assess and consider during the design and fabrication of CoCrMo dental components of optimal biocompatibility.
References
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Book
Restorative dental materials
TL;DR: Restorative dental materials, Restorative dental Materials , کتابخانه دیجیتال جندی شاپور اهواز
Toxic effects of metals
TL;DR: In this article, the effects of lead poisoning on the developing developing developing nervous system were investigated, including neurological, neurobehavioral, and developmental effects in children, and toxicity.
Journal ArticleDOI
Prediction of chemical carcinogenicity in rodents from in vitro genetic toxicity assays.
Raymond W. Tennant,Barry H. Margolin,Michael D. Shelby,Errol Zeiger,Joseph K. Haseman,Judson W. Spalding,William J. Caspary,Michael A. Resnick,Stanley Stasiewicz,Beth Anderson,Robert Minor +10 more
TL;DR: Four widely used in vitro assays for genetic toxicity were evaluated for their ability to predict the carcinogenicity of selected chemicals in rodents, indicating that chemicals positive in one in vitro assay tended to be positive in the other in vitro Assays.
Journal ArticleDOI
The carcinogenicity of metals in humans.
TL;DR: Experimental and epidemiologic data show that sparingly-soluble nickel compounds and possibly also the soluble compounds are carcinogens linked to lung and nasal cancer in humans, and some suggest that lead may be a human carcinogen, but the evidence is inconclusive.
Journal ArticleDOI
Carcinogenicity Assessment of Selected Nickel Compounds
TL;DR: The importance of recognizing the individuality of the different nickel species in reaching regulatory decisions is emphasized and the fact that different risk assessment considerations may apply for compounds that appear to produce immortality and cancer by genetic/epigenetic mechanisms is emphasized.