A conservative approach to placing posterior composite resin restorations
Article Abstract:
Cavity preparation for composite resin fillings in back teeth should be different from preparation for amalgam fillings because the properties of the material differ. Amalgam fillings need bulk to resist fracture, being dislodged, or both. They should rest on dentin as a cushion to absorb energy during chewing. The preparation should be tapered in order to help retain the filling. By contrast, resins bond better to tooth structure and do not need tapering. Nor do they need bulk to resist fracture. More healthy tooth can be retained, and multiple small cavities in the same tooth can be filled separately. However, unlike amalgam fillings, composite resin fillings wear where the cusps of opposing teeth impinge. For this reason, articulated paper should be used to determine contact points and the outline shaped to avoid these points. If this cannot be done, a sharply pointed opposing cusp can be rounded off or perhaps the contact area can be altered.
Publication Name: Journal of the American Dental Association
Subject: Health
ISSN: 0002-8177
Year: 1996
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Posterior composite resins: the materials and their clinical performance
Article Abstract:
Improvements in the composite resin materials used to fill cavities on the chewing surfaces of back teeth have improved wear resistance. The development of composite resin products made of smaller particles increased wear resistance by two-fold. Photo-cured composite resin introduced in 1970 further increased wear resistance and improved color stability. In the late 1970s, microfill composite resins were developed. Microfill is made of extremely small particles that produce a highly polishable resin. The introduction of a resin called the universal material offered dentists a single composite resin that is appropriate for use in both the front and back teeth. Universal resin materials are composed of small particles that strengthen the compounds and produce smooth surfaces. Popular universal composite resins include All Purpose Hybrid, Charisma, Herculite XRV, Tetric, and Z-100.
Publication Name: Journal of the American Dental Association
Subject: Health
ISSN: 0002-8177
Year: 1995
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An evaluation of casting alloys used for restorative procedures
Article Abstract:
Gold-based dental restorations may not be much more costly than base metal restorations and may cause fewer tissue reactions. Dental restorations using gold were widespread until the 20th century, when metals such as nickel, copper, and beryllium began to be used. The main reason for the decline of gold usage has been cost; however, the cost of the metal represents a small part of the total restoration cost. Nickel restorations frequently cause inflammation of nearby gum tissue; gold does not.
Publication Name: Journal of the American Dental Association
Subject: Health
ISSN: 0002-8177
Year: 1997
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