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Monthly Archives: February 2011

History of X-rays

History of X-rays – Since their discovery by German physicist Wilhelm Conrad Roentgen in 1895, History of X-rays have played an important role in helping dentists study structures invisible to the naked eye. On 8th November 1895, while doing research work on the electric discharge procedure in diluted gas, which …

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Matrix Band

A matrix band is used to temporarily provide the missing walls of the tooth and the shape of the restoration. The most popular matrix system is called the Tofflemire matrix. Tofflemire matrix band are manufactured out of stainless steel in two different thicknesses—.002 inch and .0015 inch. Different styles are …

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Cavity Preparation

Cavity preparation can be defined as the procedure by which caries are removed and the area of the tooth is shaped to retain the restoration. PRINCIPLES OF CAVITY PREPARATION The traditional Cavity preparation is composed of seven essential steps. In the first three steps, the dentist examines the tooth that …

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Composite Resin

Composite Resin – From their initial introduction in the late 1960s to the present, composites have undergone dramatic evolution, especially with respect to their adaptability, handling, retention, and esthetics. A composite is composed of a resin polymer with a filler of glass, silica, and quartz. Similar to a wall composed …

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Dental Amalgam

Dental Amalgam – One of dentistry’s oldest and most widely used restorative material is dental amalgam. Amalgam is without a doubt a restorative material with an excellent clinical record and has served hundreds of millions of patients successfully for more than 100 years. Amalgam’s reputation as a relatively inexpensive, forgiving …

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Amalgam Restoration

Amalgam Restoration – Dental amalgam has long been the material of choice for posterior restorations. It is also used as a core material to prepare a base for a crown or bridge. However, in cases where the darkness of the amalgam might be visible in the patient’s smile, dentists are …

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Dental cements

Dental cements are materials of comparatively low strength, but they are used extensively in dentistry when strength is not a prime consideration. Use of Dental Cements The Dental cements are generally used as: • An adhesive luting (cementing) agent for bonding fixed restorations such as crowns, bridges, inlays, and onlays. …

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Zinc Phosphate Cement

Zinc Phosphate Cement – Eugenol has an adverse reaction on acrylic materials and should not be used with acrylic temporary crowns that will be in place for long periods of time. Eugenol vapours attack the acrylic polymer, softening the acrylic and crazing its surfaces. Because of this, zinc oxide noneugenol …

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Zinc Oxide Eugenol Cement

Zinc Oxide Eugenol(ZOE) cements are noted for the sedative effect eugenol has on the pulp of teeth. Eugenol is found in the oil of cloves. The two component Zinc Oxide Eugenol cements are available in either paste/paste or powder/liquid formulas. Zinc Oxide Eugenol cements are commonly used as cavity liners …

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Glass ionomer cement

Glass ionomer cement – Building upon the polycarboxylates, researchers developed the glass ionomers in the mid-1970s. The glass ionomer cement liberate large amounts of fluoride ions, which have been demonstrated to increase resistance to recurrent decay. Use of glass ionomer cement as Luting Cement Because of their cariostatic property, glass …

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