Inlays and Onlays
What are inlays and onlays?
Inlays and onlays are a solution that sits between a filling and a crown. They are an aesthetic treatment for teeth that do not have enough healthy tissue left for a regular filling, but are not damaged enough to need a crown.
What is the difference between an inlay and an onlay?
The difference lies in how much of the tooth they cover. Inlays are more similar to fillings and sit between the cusps (the raised points) on the chewing surface of the tooth.
An onlay, on the other hand, is made to cover one or more of these cusps as well.
Frequently Asked Questions
Inlays and onlays are made of ceramic or fiber-reinforced composite.
In teeth that have had root canal treatment or extensive decay, too little healthy tooth structure often remains once the decay has been removed. Because inlays and onlays are fabricated on a model, the ideal anatomical shape and contact with neighboring teeth are easily achieved. They are also more resistant to wear and chewing forces than conventional filling materials.
The lifespan of an inlay or onlay depends on the condition of the tooth, chewing forces, how carefully the patient maintains oral hygiene, and regular dental check-ups. They generally continue to function well for decades.
- At the first appointment, the decay is removed and impressions are taken of the prepared tooth and the surrounding teeth. The tooth is sealed with a temporary filling and the impression is sent to the laboratory.
- At the second appointment, the temporary filling is removed and the inlay or onlay is bonded to the tooth with a special adhesive.
Inlays and onlays need nothing more than a regular oral care routine: brushing, flossing and routine dental visits.
