Not every cavity can be repaired with a standard filling. When decay or damage is too large for a simple filling but does not require a full crown, a dental inlay may be recommended.
Dental inlays are custom-made restorations used to repair the chewing surface of a back tooth. They fit within the cusps, or raised edges, of the tooth. This allows the tooth to be restored while preserving healthy tooth structure when the remaining tooth is strong enough to support it.
A dental exam is needed to determine whether an inlay is the right option. The dentist will check the size of the cavity, the strength of the tooth, the bite, and whether another treatment may be more appropriate.
What Is a Dental Inlay?
A dental inlay is an indirect restoration. This means it is made outside the mouth and then bonded to the tooth. It is usually used on premolars or molars when damage is located within the grooves of the chewing surface.
Inlays may be made from different materials, including porcelain, composite resin, or gold. Porcelain and composite options can be matched to the colour of the surrounding teeth, while gold may be used in some cases for strength and durability.
Unlike a standard filling, which is placed and shaped directly in the tooth, an inlay is created from a mould or digital scan. This allows the restoration to fit the prepared area closely.
When May a Dental Inlay Be Needed?
A dental inlay may be recommended when the damage is larger than what a filling can reliably repair, but the tooth does not need the full coverage of a crown.
An inlay may be considered when:
- A cavity is too large for a standard filling.
- An old filling has cracked, worn down, or fallen out.
- Decay is within the grooves of the tooth.
- The cusps of the tooth are still strong enough.
- The tooth needs added support for chewing.
If the damage extends over one or more cusps, an onlay may be recommended instead. If the tooth is weak, cracked, or heavily restored, a crown may be more suitable.
Inlays vs. Fillings
Fillings and inlays both restore damaged teeth, but they are used in different situations. Fillings are often used for smaller cavities or minor damage. They are placed directly into the prepared tooth and shaped during the appointment.
Inlays are made outside the mouth and then bonded into place. They may be recommended when the damaged area is larger or when a more custom fit is needed.
A filling may be suitable for smaller areas of decay, while an inlay may be better for a larger cavity within the chewing surface. The right choice depends on the tooth and the amount of healthy structure remaining.
Inlays vs. Onlays
Inlays and onlays are similar because both are custom-made restorations used for back teeth. The difference is how much of the tooth they cover.
An inlay fits within the cusps of the tooth. An onlay covers one or more cusps when the damage extends beyond the central grooves.
Both options may help preserve more natural tooth structure than a crown in suitable cases. However, they are not interchangeable. The dentist will recommend the option that matches the size and location of the damage.
How Is a Dental Inlay Placed?
The inlay process may vary depending on the material used and whether the restoration is made in-office or by a dental lab.
In many cases, the process includes:
- Dental Exam: The dentist examines the tooth and checks whether an inlay is appropriate.
- Tooth Preparation: Decay or damaged filling material is removed, and the tooth is cleaned.
- Impression or Scan: A mould or digital scan is taken to create the custom restoration.
- Temporary Protection: A temporary filling may be placed while the final inlay is being made.
- Fit Check: The inlay is checked for fit, shape, and bite alignment.
- Bonding: The inlay is bonded to the tooth using dental cement.
- Final Polish: The restoration is polished so it feels smooth and comfortable.
Some temporary sensitivity may occur after treatment. This usually improves, but patients should contact the dental office if discomfort continues or worsens.
What Are the Benefits of Dental Inlays?
Dental inlays may offer several benefits when they are recommended for the right tooth. Because they are custom-made, they can provide a close fit and help restore chewing function.
Possible benefits include:
- Preserving more healthy tooth structure than a full crown in suitable cases
- Restoring teeth with larger cavities or damaged fillings
- Supporting normal chewing function
- Providing a tooth-coloured repair when porcelain or composite is used
- Offering a custom fit for the prepared tooth
- Helping protect the remaining tooth structure
Inlays still require daily care. Cavities can form around the edges of any restoration if plaque is not removed properly.
Caring for a Dental Inlay
Good home care helps protect both the inlay and the natural tooth around it. Regular dental visits also allow the restoration to be checked for wear, cracks, or changes in fit.
To care for a dental inlay:
- Brush twice daily with fluoride toothpaste.
- Floss daily around the restored tooth.
- Avoid chewing ice, pens, or very hard objects.
- Wear a nightguard if grinding or clenching is a concern.
- Attend regular dental exams and cleanings.
With proper care, dental inlays can last for many years. Their lifespan depends on the material used, oral hygiene, bite pressure, and regular dental maintenance.
Restore Your Tooth with Personalized Care
A deep cavity does not always mean the tooth needs a crown. In some cases, a dental inlay may restore the tooth while preserving more of the natural structure.
At Dental Elements, we provide restorative dental care based on each patient’s oral health needs. Our team can assess your tooth, explain your options, and recommend a treatment plan that supports comfort, function, and long-term oral health.
Book an appointment at Dental Elements to learn whether a dental inlay or another restorative option may be right for you.
Frequently Asked Questions
Is getting a dental inlay painful?
The area is usually numbed during treatment to help keep the patient comfortable. Some mild soreness or sensitivity may occur afterward.
How long does a dental inlay last?
A dental inlay can last for many years with proper care. Its lifespan depends on the material used, oral hygiene, bite pressure, and regular dental visits.
Can a dental inlay fall out?
It is possible for an inlay to become loose or come out, especially if the bonding weakens or decay develops around the restoration. Regular checkups help monitor the inlay.
Is a dental inlay covered by insurance?
Coverage depends on the patient’s insurance plan. Patients should check with their insurance provider to confirm their benefits before treatment.
Is an inlay better than a filling?
Not always. Fillings may be suitable for smaller cavities, while inlays may be recommended for larger areas of damage within the chewing surface. A dental exam can help determine the best option.