INLAYS AND ONLAYS
Also known as indirect fillings, inlays and onlays are restorative dental treatments that fall somewhere between traditional fillings and crowns.
They are typically used on the back teeth (molars and premolars) when there is moderate structural damage—more extensive damage may require a full crown.
What Are Inlays and Onlays?
Also known as indirect fillings, inlays and onlays are restorative dental treatments that fall somewhere between traditional fillings and crowns. They are typically used on the back teeth (molars and premolars) when there is moderate structural damage—more extensive damage may require a full crown. Inlays and onlays offer a more conservative alternative to crowns, preserving more of the natural tooth structure.
These restorations are known for their strength, durability, and superior fit compared to traditional fillings. They also offer improved aesthetics, making them a popular choice for patients seeking a more natural-looking result.
Inlays and onlays are commonly made from tooth-colored materials such as porcelain or composite resin, allowing them to blend seamlessly with the surrounding teeth. While gold is also an option, porcelain and resin are generally preferred for their lifelike appearance. For this reason, inlays and onlays are often used to replace old or unattractive fillings.
Unlike traditional fillings—which are molded and placed directly into the cavity during a single appointment—inlays and onlays are custom-made in a dental laboratory. Once fabricated, they are carefully fitted and bonded to the tooth during a follow-up visit, ensuring a precise and long-lasting restoration.
BEFORE AND AFTER
What’s the Difference Between an Inlay and an Onlay?
An inlay is used to restore damage within the cusps (the raised areas) of a tooth. It fits neatly into the center of the tooth's chewing surface. An onlay, in contrast, covers a larger portion of the tooth—extending over one or more cusps and sometimes covering the entire chewing surface. Because of this broader coverage, onlays are often considered a more conservative alternative to crowns.
How Long Does the Procedure Take?
Typically, the process involves two appointments, each lasting about one to two hours.
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First Appointment: The tooth is prepared by removing any decay or damage. An impression is then taken and sent to a dental laboratory, where the custom inlay or onlay is fabricated. A temporary sealant is placed to protect the tooth in the meantime.
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Second Appointment: The temporary sealant is removed, and the inlay or onlay is carefully fitted. Once confirmed for proper fit and appearance, it is bonded to the tooth using a high-strength resin and polished to a smooth, natural finish.
Benefits of Inlays and Onlays
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Strength and Durability: Unlike traditional fillings, which can weaken a tooth over time, inlays and onlays are bonded with strong dental resins that reinforce the tooth structure.
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Longevity: With proper care, they can last anywhere from 10 to 30 years.
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Aesthetic Appeal: Made from tooth-colored materials such as porcelain or composite resin, inlays and onlays are virtually indistinguishable from natural teeth, offering a more attractive and discreet alternative to metal fillings.
Questions? Any more questions about inlays and onlays? View our FAQ here.