Dental Chemistry Essay - Paper Example Dental Chemistry Essay A composite is defined as the combination of two or more chemically different materials that have properties better than when the compounds act alone - Dental Chemistry Essay introduction. Resin composites, which are used in dentistry, are compounds composed of three separate agents that act together to form a rigid polymer.
This article has been cited by other articles in PMC. Abstract The longevity of dental restorations is dependent on many factors, including those related to materials, the dentist, and the patient.
Dental amalgams have successfully served the profession for over a century. The main reasons for restoration failure are secondary caries, fracture of the bulk of the restoration or of the tooth, and marginal deficiencies and wear. The importance of direct-placement, aesthetic, tooth-colored restorative materials is still increasing.
Amalgam restorations are being replaced because of alleged adverse health effects and inferior aesthetic appearance. All alternative restorative materials and procedures, however, have certain limitations.
This article will attempt to critically analyse both amalgams and resin based composites, through an evaluation of scientific literature. A cursory search through the Internet throws up a horde of articles, speculative, informative, and even downright absurd.
The fact of the matter remains that silver amalgam is still the most widely used restorative material in the developing world.
It aims to prohibit the production, importation, exportation, sale, and use of substances that contain mercury. In India, the use of amalgam has been decreasing over the years, not as much because of public perception on mercury toxicity or regulatory issues but due to the increased demand for esthetic restoratives.
There seems to be a curious reluctance to accept composite resins as a viable alternative to amalgams, and, more often than not, this reluctance can be attributed to anecdotal rather than evidence based data.
This leads to a situation where most students who graduate are woefully inadequate, with little or no clinical skills in placing composite restorations.
Posterior composite resin restorations are an established feature of contemporary dental practice and all new dental graduates should be competent in providing such treatment for their patients. As an academician, I find that most dental institutions passionately hold on to amalgam as the material of choice for undergraduates.
Surveys of educational curricula in this area, in the United Kingdom and Ireland, as well as North America, have demonstrated variations both within and between dental schools.
The theme of the conference concerned the teaching implications for changing from amalgam to composite. Perhaps the time is ripe for such a discussion in India as well. DENTAL AMALGAM Over its long clinical history, dental amalgam has evolved, and current clinical restorations represent an effective low cost dental restorative treatment, with potential clinical lifetimes in excess of several decades, under appropriate conditions.
Modern amalgams encompass a number of broad classes of materials, with variations in phase content, making them the most metallurgically complex biomaterials.
Amalgam restorations undergo a variety of solid-state and corrosion reactions after clinical placement.
This presents complications in the understanding of clinical properties and biological characteristics. Dental amalgam classes contain a number of common phases and undergo similar solid-state and corrosion reactions, some of which offer the potential for the release of mercury Hg.
Most of the Hg which is released appears to react with residual alloy particles. The older generation of low-copper amalgams before did have a limited life span, because they contained the gamma 2 phase that caused progressive weakening of the amalgam through corrosion.Polymerization of Composite Resins: Dental Chemistry e a rigid polymer because of the benzene rings near its center, and also provide specific sites for free radical polymerization from its terminal methacrylate groups.
Polymerization of Composite Resins: Dental Chemistry Essay Under: Essays Knowing this, the compound, 2-hydroxylmethods phenomenon, is added to the matrix to keep light from being absorbed and prevent the disconsolation. Polymerization of Composite Resins: Dental Chemistry Essay Sample Posted on July 11, by bros2qET1 A complex is defined as the combination of two or more chemically different stuffs that have belongingss better than when the compounds act entirely.
Tetramers- 4 monomer-unit compounds polymerization In polymer chemistry, is a process of reacting monomer molecules together in a chemical reaction to form polymer chains or three-dimensional networks.
In IUPAC definition, it is the process of converting a monomer or . Introduction. Glass ionomers (GI), introduced in (Wilson and Kent, ), set via an acid-base reaction between polymers of polyacrylic acid and fluoro-aluminosilicate alphabetnyc.com with fluoride release, their main advantage is the unique ability to bond chemically to tooth structure.
Composite resin 1. Composite o In materials and science, a solid formed from 2 or more distinct phases that have been combined to produce properties superior to or immediate to those of the individual constituents; also a term used in dentistry to describe a dental composite • Consists of at least two distinct phases normally formed by blending together components having different structures.