How Long Does a Temporary Crown Last?

A temporary dental crown is designed to last 2 to 3 weeks — the standard laboratory turnaround time for fabricating a permanent crown. While temporary crowns can remain functional for 4 to 6 weeks in situations where the permanent crown is delayed, they are not built for long-term use. The Australian Dental Association advises that temporary crowns should be replaced with permanent restorations as soon as practically possible, as the temporary materials and cement degrade with extended exposure to the oral environment.

At Townsville Dental Clinic, our typical turnaround from tooth preparation to permanent crown fitting is 10 to 14 business days. We work with experienced dental laboratories to minimise wait times and ensure your temporary crown period is as short and comfortable as possible.

What Is a Temporary Crown Made Of?

Temporary crowns are fabricated chairside (in the dental practice) during your preparation appointment. They are made from acrylic resin or composite resin — materials that are quick to mould but significantly weaker than the porcelain, zirconia, or ceramic used in permanent crowns.

Feature	Temporary Crown	Permanent Crown
Material	Acrylic or composite resin	Porcelain, zirconia, e.max ceramic, or gold
Strength	Moderate — prone to cracking under heavy force	High — designed for full biting force
Cement	Temporary cement (designed for easy removal)	Permanent cement or adhesive resin
Lifespan	2–6 weeks	10–15+ years
Aesthetics	Acceptable but not colour-matched precisely	Custom shade-matched to natural teeth
Fit	Adequate but not precision-milled	Laboratory-milled for exact fit

Why Temporary Crowns Are Not Designed to Last

Three factors limit the lifespan of a temporary crown:

Weaker material — acrylic resin has roughly one-third the fracture resistance of porcelain or zirconia. A 2019 study in the Journal of Prosthetic Dentistry measured the average fracture strength of temporary crowns at approximately 400 N, compared to 900 to 1,200 N for zirconia crowns. This means temporary crowns are vulnerable to cracking under normal chewing forces, especially on back teeth.
Temporary cement — the cement used is intentionally weak so your dentist can remove the temporary crown easily at the fitting appointment. Over time, saliva dissolves the cement, creating micro-gaps where bacteria can enter and cause decay on the prepared tooth underneath.
Marginal seal — the edges of a temporary crown do not seal as precisely as a permanent crown. This allows plaque accumulation at the gum line and increases the risk of gum inflammation during the temporary period.

How to Care for Your Temporary Crown

Follow these guidelines to keep your temporary crown intact until your permanent crown is ready:

Chew on the opposite side — reduce pressure on the temporary crown during meals.
Avoid sticky foods — toffees, caramels, chewing gum, and sticky lollies are the most common cause of temporary crown dislodgement.
Avoid hard foods — nuts, ice, popcorn kernels, and crusty bread can crack the temporary material.
Brush gently — use a soft-bristled toothbrush and brush carefully around the temporary crown.
Floss with care — slide the floss out sideways rather than snapping it upward through the contact point, as the upward motion can catch the crown edge and pull it off.
Use lukewarm water — avoid very hot or very cold drinks to minimise sensitivity on the prepared tooth.
Do not use whitening products — whitening toothpaste and mouthwash can erode acrylic resin.

Warning Signs: When to Call Your Dentist

Contact Townsville Dental Clinic promptly if you experience any of the following:

The temporary crown falls off — retrieve it, store it in a clean container, and call us. Do not leave the prepared tooth exposed.
The temporary crown cracks or chips — even a small crack compromises the seal and exposes the underlying tooth.
Persistent pain or throbbing — mild sensitivity is normal for 1 to 2 days, but ongoing pain may indicate the nerve is inflamed.
Swelling or a bad taste — these may indicate infection beneath the temporary crown.
The bite feels high — if the temporary crown interferes with your bite, it needs adjustment to prevent discomfort and damage to opposing teeth.

What Happens If You Wear a Temporary Crown Too Long?

Wearing a temporary crown beyond 6 weeks increases the risk of:

Secondary decay — bacteria entering through the weakened cement seal.
Tooth movement — the temporary crown may not hold the tooth’s position as precisely, meaning the permanent crown may need adjustment or remake.
Gum inflammation — the rough margins of a temporary crown accumulate more plaque than a smooth permanent crown.
Crown fracture — the longer the temporary is in place, the higher the probability of breakage.

If your permanent crown is delayed for any reason, contact your dentist to have the temporary crown assessed and potentially replaced with a fresh one.