What Are Dental Inlays and Onlays?
Inlays and onlays are custom-made restorations designed to repair teeth that have moderate decay or damage — more than a filling can handle, but not enough to require a full crown. They are fabricated from tooth-colored ceramic or porcelain in a dental laboratory and then bonded to your tooth in a precise, two-visit process.
Inlays vs. Onlays — What's the Difference?
The key difference is in the coverage. An inlay fits within the grooves (cusps) of your tooth, much like a filling. An onlay extends over one or more cusps, providing additional coverage and support when a larger portion of the tooth is compromised. Your dentist at San Jose Dental Clinic will examine your tooth and recommend the option that best preserves your natural structure.
Benefits of Porcelain Inlays and Onlays
Porcelain inlays and onlays offer several advantages over traditional metal or composite fillings. They are custom-crafted to match the color and contour of your natural teeth, providing a seamless, aesthetic result. The material is also highly durable and stain-resistant, helping your restoration stay strong and beautiful for years.
Why Custom Ceramic Restorations Outperform Standard Fillings
Standard fillings are placed while the material is still soft and harden inside your mouth. In contrast, custom ceramic restorations are fabricated in a lab from precise impressions of your tooth. This process creates a stronger, more precise fit that can better withstand the forces of chewing. Additionally, the bonding technique used for inlays and onlays reinforces the remaining tooth structure, reducing the risk of fracture.
Inlays & Onlays vs. Dental Fillings — Which Do You Need?
Choosing between a filling and an inlay or onlay depends on the extent of the decay or damage. Fillings work well for small to moderate cavities. But when a tooth has lost significant structure, a filling may not provide enough support and could lead to further cracking or failure. Inlays and onlays are designed for these situations, offering a stronger, longer-lasting solution.
When a Filling Is Enough — and When It Isn't
Your dentist will evaluate the size, location, and condition of your tooth to determine the best approach. If the damage involves the chewing surface and extends to the cusps, an onlay may be recommended. If the cavity is contained within the grooves, an inlay could be sufficient. Learn more about our dental fillings and how they compare. For more extensive damage, our crowns & bridges may be the appropriate next step.
What to Expect at Your Appointment
Your journey to a restored tooth begins with a thorough examination and digital X-rays. Dr. Andrea Leal or one of our skilled general dentists will prepare the tooth, take a precise digital impression, and place a temporary restoration. Your custom porcelain inlay or onlay is then fabricated in a dental lab.
Step-by-Step: The Inlay and Onlay Process at San Jose Dental Clinic
- Evaluation and preparation: The tooth is numbed with our extra-gentle numbing technique. Decay or old filling material is removed, and the tooth is shaped to receive the restoration.
- Impression and temporary: A digital impression captures the exact dimensions of your tooth. A temporary inlay or onlay is placed to protect it while your permanent restoration is being created.
- Bonding: On your second visit, the temporary is removed, and your custom porcelain restoration is carefully bonded into place, adjusted for fit and bite, and polished for a natural-looking finish.
If you have a chipped or cracked tooth, an inlay or onlay may be an excellent option for chipped/cracked tooth repair.