Onlay VS Crown – What’s The Difference?

Yorkshire Dental Suite provides onlays and crowns, alongside other treatments such as white fillings, to patients with damaged teeth. Enquire today.

Onlays and crowns are two treatments that are often confused. While they are used by dentists for similar reasons, there are key differences that distinguish the two.

What is an onlay?

An onlay is a type of dental restoration that repairs damage on the cusp (the top surface) of the tooth. The treatment combines the properties of a filling and a dental crown, helping to fix weak, broken teeth without needing to replace the whole visible portion of the tooth.

Key facts:

Use: Repairs teeth weakened by decay and dental trauma
Longevity: 10 – 15 years
Material: Porcelain, composite resin or gold
Ideal for: When the damage is too extreme for a filling, but doesn’t require a crown
Average cost UK: £400 – 900
Available on the NHS: Yes

What is a crown?

A dental crown has the ability to fully restore your tooth back to health. Leaving the root intact, this versatile treatment replaces damage on the visible portion of the tooth, helping to restore a strong, healthy smile. In some cases, it can forgo the need for an extraction or dental implant.

Key facts:

Use: Replaces damage on the visible portion of the tooth
Longevity: 15+ years
Material: Zirconia, porcelain, silver or gold
Ideal for: Severe damage and decay
Average cost UK: £400 - £1,500
Available on the NHS: Yes

Onlay vs crown: Similarities

The main similarity is that they are both a type of dental restoration. Their sole functions? Repair damage, strengthen your bite and prevent further decay. Both require 2 - 3 appointments with your dentist, and have an excellent longevity (if well cared for by the patient).

They are also widely accessible, with both treatments being available at NHS and private dental clinics, but you may be referred to a private practitioner if your case is deemed too complex.

Onlay vs crown: Differences

There is one significant difference between an onlay and a crown – how much tooth they cover. An onlay covers just the cusp, while a crown covers the whole tooth. How else do they differ?

Difference	Explanation
Cost	An onlay is generally cheaper than a dental crown.
Tooth preservation	Onlays preserve more of your tooth structure and require less preparation.
Longevity	Crowns tend to have a longer lifespan than an onlay, lasting 15+ years if well cared for.
Severe damage	A crown is better suited to more extreme damage as it provides structural reinforcement to a larger surface area.

Which is better, an onlay or a crown?

This depends on the condition of your teeth. If the damage is too extreme for a filling but not a crown, consider choosing an onlay. Alternatively, if the damage is more extensive, opt for a crown. In this case, it’s not about which treatment is better – it’s which treatment is more suitable for your tooth.

Conclusion:

Do you have a tooth in need of repair? Contact Yorkshire Dental Suite about your onlay or crown treatment. We have same and next-day appointments available if you are experiencing discomfort.