How the Dental Inlay and Onlay Procedure Works
The process involves multiple steps, ensuring a precise fit and durable restoration. Below is a breakdown of the procedure from start to finish.
Step 1: Removing Tooth Decay
Before placing an inlay or onlay, the dentist first removes any decayed or damaged portions of the tooth. This step is crucial for preventing further decay and infection. The area is then thoroughly cleaned to prepare for restoration.
Dentists use local anesthesia to numb the area, ensuring a pain-free experience. For those with anxiety, sedation options such as nitrous oxide or oral sedation may also be available.
Step 2: Taking an Impression for a Custom Fit
Once the tooth is prepped, the dentist takes an impression (mold) of the tooth. This can be done using:
- Traditional impressions (a putty-like material)
- Digital scans (3D imaging for a precise model)
The mold is then sent to a dental lab, where technicians craft a custom inlay or onlay that fits perfectly over the tooth. This process typically takes 2–3 weeks.
Step 3: Temporary Inlay or Onlay Placement
Because the permanent restoration takes time to manufacture, the dentist places a temporary inlay or onlay to protect the tooth. This temporary piece:
✔ Prevents sensitivity
✔ Maintains the tooth’s shape
✔ Allows you to eat normally
Patients should avoid sticky or hard foods to prevent damage to the temporary restoration.
Step 4: Crafting the Permanent Restoration
At the dental lab, skilled technicians create a custom inlay or onlay using high-quality materials, such as:
- Porcelain – Matches natural teeth and is stain-resistant
- Gold – Extremely durable and long-lasting
- Composite resin – Aesthetic and cost-effective
The chosen material is shaped and polished to blend seamlessly with the tooth.
Step 5: Bonding the Inlay or Onlay to the Tooth
Once the final restoration is ready, the patient returns for their second appointment. The dentist:
✔ Removes the temporary restoration
✔ Ensures the permanent inlay or onlay fits perfectly
✔ Bonds it securely to the tooth using strong dental cement
✔ Polishes the surface for a smooth and natural look
After placement, the inlay or onlay functions just like a natural tooth, restoring both strength and aesthetics.
Benefits of the Dental Inlay and Onlay Procedure
The dental inlay and onlay procedure offers several advantages over traditional fillings and crowns:
✅ Stronger than fillings – Prevents further tooth damage
✅ Preserves more natural tooth structure – Unlike crowns, which require more reshaping
✅ Seamless appearance – Blends naturally with your teeth
✅ Durable and long-lasting – Can last 10–30 years with proper care
✅ Resistant to staining – Especially porcelain and gold inlays/onlays
✅ Prevents bacteria buildup – Creates a tight seal against further decay
How Long Do Inlays and Onlays Last?
With proper oral hygiene, inlays and onlays can last anywhere from 10 to 30 years. Their longevity depends on:
- Material used (gold lasts the longest)
- Biting and chewing habits
- Oral hygiene routine (brushing and flossing)