Inlays and onlays is a compromise between fillings and crowns.They are highly aesthetic treatment methods when the teeth doesn't have enough structure to make filling or not damaged too much to make a crown.
Inlays and onlays are made of ceramic or fiber-reinforced composite.
After the root canal treatment or after cleaning of large decays , generally the teeth has insufficient dental tissue. This makes it impossible to establish a contact with the adjacent teeth. Inlay and onlays are prepared on models so form and contact can be provided easily. They are also more resistant to chewing pressure than conventional filling materials.