Composite fillings

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Composite fillings

Dental composite Dental composites, also called "white fillings", are a group of restorative materials used in dentistry.

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Crowns and in-lays can be made in the laboratory from dental composites. These materials are similar to those used in direct fillings and are tooth-colored. Their strength and durability is not as high as porcelain or metal restorations and they are more prone to wear and discolouration.

As with other composite materials, a dental composite typically consists of a resin-based matrix, which contains a modified methacrylate or acrylate.

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The filler particles give the composites wear resistance as well. Compositions vary widely, with proprietary mixes of resins forming the matrix, as well as engineered filler glasses and glass ceramics.

A coupling agent such as silane is used to enhance the bond between resin matrix and filler particles. After tooth preparationa thin primer or bonding agent is used. Modern photo-polymerised composites are applied and cured in relatively thin layers as determined by their opacity.

Composite fillings

Glass ionomer cement[ edit ] A glass ionomer cement Composite fillings is one of a class of materials commonly used in dentistry as filling materials and luting cements.

These materials are based on the reaction of silicate glass powder and polyalkenoic acid. These tooth-coloured materials were introduced in for use as restorative materials for anterior teeth particularly for eroded areas, Class III and V cavities.

As they bond chemically to dental hard tissues and release fluoride for a relatively long period, modern-day applications of GICs have expanded. The desirable properties of glass ionomer cements make them useful materials in the restoration of carious lesions in low-stress areas such as smooth-surface and small anterior proximal cavities in primary teeth.

Results from clinical studies also support the use of conventional glass ionomer restorations in primary molars. They need not be put in layer by layer, like in composite fillings.

Porcelain ceramics [ edit ] All-ceramic Dental Onlay for a molar tooth [8] Full-porcelain dental materials include dental porcelain porcelain meaning a high-firing-temperature ceramicother ceramicssintered- glass materials, and glass-ceramics as indirect fillings and crowns or metal-free "jacket crowns".

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They are also used as inlays, onlays, and aesthetic veneers. A veneer is a very thin shell of porcelain that can replace or cover part of the enamel of the tooth. Full-porcelain restorations are particularly desirable because their color and translucency mimic natural tooth enamel.

Another type is known as porcelain-fused-to-metal, which is used to provide strength to a crown or bridge. These restorations are very strong, durable and resistant to wear, because the combination of porcelain and metal creates a stronger restoration than porcelain used alone. Some of the materials used are glass-bonded porcelain Viablocklithium disilicate glass-ceramic a ceramic crystallizing from a glass by special heat treatmentand phase stabilized zirconia zirconium dioxide, ZrO2.

Previous attempts to utilize high-performance ceramics such as zirconium-oxide were thwarted by the fact that this material could not be processed using the traditional methods used in dentistry.

Because of its high strength and comparatively much higher fracture toughness, sintered zirconium oxide can be used in posterior crowns and bridges, implant abutments, and root dowel pins.

Not as aesthetic as porcelain-fused-to-ceramic, many dentists will not use new machine-made "monolithic" zirconia and lithium disilicate crowns on anterior front teeth.

The demand for full ceramic solutions, however, continues to grow. Comparison[ edit ] Composites and Amalgam are used mainly for direct restoration.It was November 1, in Atlanta, GA when Donna Green gave birth to her second child, and first son, Raymond.

Dental material - Wikipedia

As she stares down at her newborn son through the window outside of the nursery at Grady Memorial Hospital, Donna has no idea that she is not the only one who is watching her new baby. Dental bonding is a procedure in which a tooth-colored resin material (a durable plastic material) is applied and hardened with a special light, which ultimately "bonds" the material to the tooth.

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You will not be pressured to buy anything. An amalgam tattoo is caused by the mixture used in silver fillings spilling onto the gum tissue. Learn how to spot and how best to treat amalgam tattoos.

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