These types of restorations are used to repair decayed or damaged teeth. They are recommended when your tooth needs more support than a regular filling and are made of a ceramic material to match the colour of your tooth.
Inlays are recommended to replace the inside biting portion of a tooth when the healthy structure remains on the outside biting portion of the tooth. Onlays are used to replace broken cusps or to add strength to compromised areas around the perimeter of the tooth.
You may just require a crown, which just covers more of the surface of the tooth,