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Inlays and onlays are used in molars or premolars, when the tooth has experienced too much damage to support a basic filling, but not so much damage that a crown is necessary. The key comparison between them is the amount and part of the tooth that they cover.
Fillings fail because of changes in the filling, tooth or the bond between them. Secondary cavity formation can also affect the structural integrity the original filling. Fillings are recommended for small to medium-sized restorations. Inlays and onlays are more expensive indirect restoration alternative to direct fillings.
Indirect dental composites can be used for: Filling cavities in teeth, as fillings, inlays and/or onlays; Filling gaps (diastemas) between teeth using a shell-like veneer or; Reshaping of teeth; Full or partial crowns on single teeth; Bridges spanning 2-3 teeth; A stronger, tougher and more durable product is expected in principle.
Gold fillings have excellent durability, wear well, and do not cause excessive wear to the opposing teeth, but they do conduct heat and cold, which can be irritating. There are two categories: cast gold fillings (gold inlays and onlays) made with 14 or 18 kt gold, and gold foil made with pure 24 kt gold that is burnished layer by layer.
Dental fillings are often used to fill cavities or holes after root canal treatment. [6] They can also be used to restore worn teeth or fill gaps between teeth. [ 7 ] Fillings can be made of amalgam (a metal alloy) or materials such as composite resin and glass ionomer.
An acceptable distance from the tooth margin to the restoration margin is anywhere from 40 to 100 nm. However, the R.V. Tucker method of gold inlay and onlay restoration produces tooth-to-restoration adaptation of potentially only 2 nm (confirmed by scanning electron microscopy), less than the diameter of a single bacterium.
A glass ionomer cement (GIC) is a dental restorative material used in dentistry as a filling material and luting cement, [1] including for orthodontic bracket attachment. [2] Glass-ionomer cements are based on the reaction of silicate glass-powder (calciumaluminofluorosilicate glass [ 3 ] ) and polyacrylic acid , an ionomer .
Sometimes permanent restoration is not done after tooth preparation; this may be to prepare for indirect restoration such as inlays and onlays. Temporary fillings are also used for 'stabilization' techniques where many restorations are needed, and the problem may become worse before it can be fully treated – so temporary fillings are placed ...
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