There are times when a tooth suffers damage (from decay, for example) that is too extensive to be treated with a simple filling — but not extensive enough to need a full-coverage crown. In these cases, the best option for restoring the tooth may be an inlay or onlay.
Both inlays and onlays are considered “indirect” fillings, meaning that they are fabricated outside the mouth, and then bonded to the tooth by the dentist. This is in contrast to a “direct” filling, which is applied directly to the cavity by the dentist.
An indirect filling is considered an “inlay” when it fits within the little points or “cusps” of a back (premolar or molar) tooth. It is an “onlay” if it covers one or more of these cusps. Either way, the procedure for placing an inlay or onlay is the same.
How It Works
Getting an inlay or onlay is very much like what you would experience having a crown placed, with one important distinction: less of your natural tooth structure will need to be removed by drilling when you receive an inlay or onlay. When you get a crown, the tooth needs to undergo significant reshaping so that it will fit inside its new covering. Since dentistry's goal is to preserve as much of your natural tooth structure as possible, inlays and onlays may be recommended instead of crowns when a tooth can be restored with this more conservative type of treatment.
The first steps in getting an inlay or onlay are numbing the tooth and surrounding area with a local anesthetic, and then removing the decay. This is done in order to prevent the decay, which is actually a type of infection, from progressing deeper into the tooth.
Once the tooth has been prepared, digital scans of your teeth are taken digitally with our CEREC technology, and designed by our doctor and dental assistants. Then your inlay/onlay is milled out in our CEREC milling machine in a matter of minutes. Depending on the type of material used your crown will then either be bonded to your remaining tooth structure or placed in our CEREC heating furnace to strengthen and finalize your restoration. Everything can be in done in our office, in about an hour and a half to two hours, leaving more time for whatever is important to you outside the dental office
Inlays and onlays are strong, long-lasting, and require no greater level of care than any other tooth. Conscientious daily brushing and flossing, and regular professional cleanings at the dental office are all you need to make sure your restoration lasts for years to come.
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