What Is a Dental Inlay or Onlay?

Dental inlays and onlays are custom-made restorations used to repair back teeth that are too damaged for a filling but don’t require a full crown.

  • An inlay fits neatly within the centre of the tooth, repairing damage on the biting surface.

  • An onlay covers a larger area and may extend over one or more of the raised edges (cusps) of the tooth.

  • Both are precision-made to fit your tooth exactly.

  • They are securely bonded in place to restore strength and function.

  • They preserve more healthy tooth structure than a crown, making them a more conservative option where suitable.

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Are Inlays & Onlays Right for Me?

You may benefit from an inlay or onlay if:

  • You have a cavity that’s too large for a standard filling.

  • Your tooth is cracked or worn but still strong enough to avoid a crown.

  • An old filling has broken down and needs a more durable replacement.

  • You’re looking for a stronger, longer-lasting alternative to a regular filling.

When might another option be recommended?

Your dentist may suggest a different treatment if:

  • The tooth is severely weakened and needs full coverage with a crown.

  • There isn’t enough healthy tooth structure to support an inlay or onlay.

  • Active gum disease or infection needs to be treated first.

  • A smaller, simpler filling would achieve the same result.

During your exam, we’ll assess the strength of your tooth and recommend the most conservative option that restores both function and longevity.

What to Expect: Exam & Treatment

During your exam

  • We assess the tooth and take X-rays if needed.
  • We confirm whether an inlay, onlay or crown is most suitable.
  • We explain material options clearly.

During treatment

First visit:

  • We gently remove decay and prepare the tooth.
  • We take a digital scan or a soft mould of your tooth to create a precise fit.
  • A temporary filling protects the tooth while your custom restoration is made.

Second visit:

  • The temporary filling is removed.
  • Your inlay or onlay is checked for fit and comfort.
  • It’s securely bonded in place.
  • Final adjustments are made so your bite feels natural.

Aftercare & longevity

  • Brush and floss as normal.
  • Avoid chewing very hard objects.
  • Wear a nightguard if you grind your teeth.
  • Attend regular check-ups.
  • Most inlays and onlays last 10–20 years with proper care.

Closeup for dental onlay on a molar tooth shown on a plaster model

Cost of Inlays & Onlays

The cost of inlays and onlays starts from £917, but will depend on:

  • The size of the restoration.
  • The material chosen.
  • The position of the tooth.
  • Whether additional treatment is required.

We’ll confirm the full cost during your exam before any treatment begins.

0% finance options are available where applicable.

Benefits of Inlays & Onlays

Inlays and onlays are designed to restore strength while preserving as much healthy tooth structure as possible.

Greater strength & durability

Stronger and more stable than large fillings, helping protect the tooth from further fracture or wear.

Conservative tooth preservation

Require less removal of healthy tooth structure compared to a full crown.

Precise custom fit

Individually crafted to match the exact shape of your tooth for a secure, comfortable fit.

Natural appearance

Tooth-coloured porcelain options blend seamlessly with your surrounding teeth.

Long-lasting results

With good oral hygiene and regular check-ups, inlays and onlays can provide many years of reliable function.

Why Choose Together Dental?

  • Our dentists regularly restore damaged teeth with inlays and onlays, prioritising long-lasting strength and natural function.
  • We carefully assess your tooth to determine whether an inlay, onlay, or another option is most appropriate for your long-term oral health.
  • We aim to protect and strengthen your natural tooth wherever possible, helping you avoid more extensive treatment when suitable.
  • We use durable, natural-looking materials such as porcelain and composite to ensure a precise, hard-wearing restoration.
  • 0% interest-free finance is available, with longer-term plans to suit different budgets.

Are onlays and inlays suitable for me?

Onlays and inlays are suitable if you have moderate tooth damage or decay that doesn’t require a full crown.

Our dentists will determine during your exam whether they are the right option for your specific dental needs.

What’s the difference between an inlay and an onlay?

An inlay repairs the centre of a back tooth.

An onlay covers a larger area and may extend over one or more raised edges of the tooth.

How long do dental inlays and onlays last?

With good oral care, inlays and onlays typically last 10–20 years.

Their lifespan depends on the material used and how well you maintain your teeth.

How long does treatment take? 

Treatment usually takes two visits.

At the first visit, we prepare the tooth and take a digital scan or soft mould.

At the second visit, your custom restoration is fitted and bonded securely in place.

Are dental inlays and onlays painful?

No. We use a local anaesthetic, so you shouldn’t feel pain during treatment.

You may notice mild sensitivity afterwards, but this usually settles within a few days.

Are there any side effects of inlays and onlays?

Inlays and onlays are generally very safe, but some patients may experience mild sensitivity to hot or cold temperatures after the procedure. This sensitivity typically subsides within a few days. Rarely, allergic reactions to the materials used may occur, which our dentists can address.

What material is best for inlays and onlays?

The best material for inlays and onlays depends on your specific needs and preferences. We offer porcelain, composite, and gold. 

Porcelain is popular for its natural appearance and durability, while composite is more affordable and blends well with teeth. Gold is highly durable and long-lasting, but some patients find gold less aesthetically pleasing.

Our dentists can help you choose the most suitable material based on your situation and preferences.

Can inlays and onlays be repaired if damaged?

Minor chips in ceramic or composite inlays can sometimes be repaired, though replacement is often necessary for optimal results. Gold inlays rarely require repair due to their exceptional durability.

Will my dental inlay or onlay look natural?

Modern ceramic and porcelain inlays provide excellent aesthetic results, closely matching your natural tooth colour and translucency. Your dentist will carefully select materials to ensure optimal appearance.

How do I maintain my inlay or onlay results? 

To maintain your inlay or onlay results, practice good oral hygiene by brushing twice a day and flossing daily. Regular dental check-ups and cleanings are essential to monitor the condition of the restoration.

Avoid chewing on hard objects like ice or pens to prevent damage, and consider wearing a mouthguard if you grind your teeth at night.

Can I eat normally afterwards?

Yes. Once the numbness wears off, you can eat as usual.

We recommend avoiding very hard or sticky foods for the first 24 hours.

Are inlays and onlays available on the NHS?

Yes, we accept both NHS and private patients where eligible.

The materials and appointment process may differ between NHS and private care, which we’ll explain during your exam.

How much do dental inlays and onlays cost?

The cost of inlays and onlays starts at £917, but varies depending on the material and complexity. Composite options are generally most affordable, while porcelain and gold are more costly.

Our Clinic Locations

Dental inlays and onlays are available at all of our clinics nationwide.

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Find your local Together Dental Practice

Restore Larger Cavities and Broken Fillings

If you have a large cavity, a cracked tooth, or an old filling that’s failed, an inlay or onlay may be a long-lasting solution.

Our experienced dentists will carefully assess your tooth and recommend the most suitable way to restore its strength, comfort, and natural appearance.

Call today: 01206 369 701

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