Download Basic guide to dental materials by Carmen Scheller-Sheridan PDF

By Carmen Scheller-Sheridan

The 'Basic advisor to Dental fabrics' is the basic advisor to dental fabrics for all individuals of the dental staff. details is supplied in a transparent and concise demeanour, breaking the subject of dental fabrics right down to the middle fundamentals

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Resin composites consist of an organic resin, reinforcing filler and a coupling agent. The resin allows resin composite to be moulded and set by polymerisation (light or chemical curing); the filler contributes to the strength and hardness of the material; and the coupling agent binds the components together. Different types, sizes and shapes of fillers (powdered glass, quartz, ceramic particles and silica) affect the characteristics of individual resin composites. There are various classifications of resin composite materials.

Dental amalgam capsules contain ‘spills’ of amalgam; a spill refers to the amount of material contained in the capsule. The capsules may be colour coded to help users distinguish between spills. e. 1 spill = a single mix (600 mg), 2 spills = a double mix (800 mg), etc. Three spill sizes are available (size may vary depending on the manufacturer). It is the operator that will request the spill of amalgam needed, which corresponds to the size of the cavity preparation to be filled. 3). 4) must be used to ensure safe and proper disposal of excess dental amalgam.

31 Amalgam alloys are classified by their composition and particle shape. 1a) is made up or irregular-shaped alloy particles. 1b) is made up of spherical shaped alloy particles and requires less mercury to bind the materials due to its smoothness. 1c) is a mixture of both spherical and lathe-cut particles. Operators often choose a spherical or admixed alloy, as the spherical particles act as reinforcers and can be more closely packed, resulting in a higher strength amalgam. The amount of copper in amalgam classifies it as either a high- or low-copper amalgam.

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