Inlays and onlays are permanent dental restorations that are used to fill large areas of missing tooth structure due to decay or damage. They are more durable and long-lasting than fillings, and they offer a more natural appearance.

The main difference between an inlay and an onlay is the amount of tooth structure that they cover. An inlay is placed inside the tooth, filling in the area between the cusps. An onlay covers one or more cusps, or sometimes the entire biting surface of the tooth.

Inlays or onlays may be necessary if you have a large cavity or other damage to your tooth. They may also be used to repair a tooth that has already had a filling, or to reinforce a weakened tooth.

Inlays and onlays offer a number of benefits over fillings, including:

Durability: Inlays and onlays are more durable than fillings, and they are less likely to chip or crack.

Longer lifespan: Inlays and onlays can last for many years, even decades.

Natural appearance: Inlays and onlays can be made to match the color of your natural teeth, giving you a more natural smile.

The inlay or onlay procedure typically takes two visits to the dentist.

At the first visit, your dentist will:

Discuss your treatment options and answer any questions you may have.

Examine your teeth and gums to determine if inlays or onlays are the right treatment for you.

Numb the area around the affected tooth.

Remove any decay.

Shape the tooth to create a precise fit for the inlay or onlay.

Take impressions of your teeth to create a model for the dental laboratory.

At the second visit, your dentist will:

Remove the temporary filling.

Clean the prepared tooth.

Place the permanent inlay or onlay.

Make any necessary adjustments.

Inlays and onlays can last for many years, even decades. However, the lifespan of your inlay or onlay will depend on a number of factors, including the material it is made of, your oral hygiene habits, and your overall health.

Porcelain: Porcelain is a durable and naturally-looking material that is often used for inlays and onlays.

Composite resin: Composite resin is a strong and affordable material that is often used for inlays and onlays.

Zirconia: Zirconia is a strong and durable material that is often used for onlays.