Your dentist has just told you that you need a crown. Maybe you’ve been coming to Smile Spot from Salisbury, or you drove in from Parafield Gardens after finally getting that nagging tooth checked — and now you’re sitting in the car wondering: do I really need this, or is there another way?
It’s a fair question, and you deserve a straight answer. Here’s when a crown genuinely makes sense, what the alternatives look like, and how the whole process works at our Mawson Lakes practice — including why most people walk out with a finished crown on the same day they came in.
When is a crown actually necessary?
A crown (sometimes called a cap) covers the entire visible portion of a tooth above the gumline. It’s recommended when a tooth is too damaged or weakened to be reliably restored any other way. That can happen for a few different reasons.
The filling has taken over most of the tooth This is one of the most common situations. As a rough guide, when a filling occupies more than about half the width of a tooth, the remaining tooth structure around it becomes fragile — like trying to hold together a thin shell. That’s not a comment on how the filling was done; it’s just physics. A crown wraps around the tooth and protects what’s left from cracking under normal chewing pressure.
There’s a crack running through the tooth A crack that extends into the tooth can produce a sharp, distinctive pain when you bite down. If it’s not treated, cracks have a tendency to spread further — and once a crack runs deep enough, the tooth may not be saveable at all. A crown holds the tooth together and stops the crack from propagating.
The tooth has had root canal treatment Root canal treatment clears out the nerve tissue and creates an opening through the top of the tooth. That process, while effective, leaves the tooth structurally weaker and more brittle than before. For back teeth in particular — the ones doing the heavy lifting with chewing — a crown is the standard follow-up to protect against fracture.
The tooth is worn down significantly If you’re a grinder, this one might resonate. Bruxism (teeth grinding, often at night) can gradually flatten and shorten teeth over time. Acid erosion from diet or reflux can do the same. When teeth are worn to the point where the height and shape are substantially altered, crowns can restore both function and structure. Worth noting: if grinding is the cause, a custom mouthguard will also be part of the picture to protect the new crown once it’s in.
The crown is part of an implant restoration When a dental implant replaces a missing tooth, the crown is the visible part — the tooth you can see and use. The crown sits on top of the implant post and functions like a natural tooth.
Are there alternatives?
Sometimes, yes. It depends on how much healthy tooth structure is left and where the damage is.
A filling may still be the right call if the damage or decay is more contained and there’s enough solid tooth structure around it. If a filling can reliably restore the tooth, that’s the simpler path and Dr Sunny will say so.
Inlays and onlays are worth knowing about — they sit in the middle ground between a filling and a full crown. An inlay fills within the cusps of a back tooth, like a large, precision-fit filling made from ceramic or composite. An onlay goes a step further and covers one or more of the outer cusps. Both are custom-made, stronger than a direct filling, and more conservative than a full crown. They’re a good option when damage is significant but not widespread enough to justify covering the whole tooth.
Extraction is occasionally the most practical choice — when a tooth is too damaged to restore predictably, or when the expected lifespan of a restored tooth doesn’t justify the investment. But extraction comes with its own consequences worth understanding: neighbouring teeth can drift into the gap, bone loss occurs at the site over time, and if you want to replace the tooth, that means an implant or bridge down the track. Wherever possible, keeping the natural tooth is the better long-term outcome.
If you’re coming in from Para Hills or Ingle Farm with a second-opinion mindset, that’s completely reasonable. We use digital x-rays to give a clear picture of what’s actually happening inside the tooth, and we’ll walk you through the findings before recommending anything.
What crowns are made from today
The material used depends on which tooth is being crowned and what it needs to do.
All-ceramic and porcelain crowns are used primarily for front teeth, where appearance matters most. They’re made entirely from tooth-coloured ceramic, which blends well with surrounding teeth. They look natural and perform well in positions that don’t bear heavy chewing loads.
Zirconia crowns have become the standard for back teeth, where the forces involved are considerably higher. Zirconia is very strong and resistant to fracture — more so than traditional porcelain — and it can still be shaded to match natural tooth colour. It’s the material we use most often for molar and premolar restorations.
Porcelain-fused-to-metal (PFM) crowns were the workhorse of dentistry for decades and are still serviceable. They have a metal core with a porcelain layer on top. The trade-off is that the porcelain can chip, and the metal margin at the gumline can become visible as the gum changes over time. Most new crown work today uses all-ceramic or zirconia instead.
CEREC same-day crowns: how it works at Smile Spot Mawson Lakes
The traditional crown process involves two separate appointments. You come in, the tooth is prepared, impressions are sent off to an external dental laboratory, and you leave wearing a temporary crown. A week or two later, you come back to have the permanent crown fitted. That’s two half-days off work — not ideal for anyone, but particularly tricky if you’re a nurse at Lyell McEwin, a researcher at UniSA Mawson Lakes campus, or an engineer working at Technology Park.
At Smile Spot, located at 1/3 Coventry Street Mawson Lakes, we have CEREC same-day crown technology on site. The crown is designed and milled right here in the practice, not sent to a lab. Here’s how an appointment goes:
- Digital scan — an intraoral camera takes a precise 3D image of the prepared tooth. No impression trays, no putty, no gagging.
- On-screen design — the crown is designed digitally, shaped to fit your bite and match the natural contours of your surrounding teeth.
- Milling — the crown is milled from a solid ceramic block while you sit in the chair. This takes around 15 to 20 minutes.
- Fitting — the crown is polished, colour-adjusted, and permanently bonded.
You walk out with the finished, permanent crown the same day. No temporary to worry about. No follow-up appointment to fit in around school pickup or a shift at Edinburgh RAAF base. One visit, done.
For families in Mawson Lakes — where roughly half of households have children at home — or for professionals who simply can’t take two separate half-days off work, this makes a meaningful practical difference.
How long will a crown last?
With reasonable care, crowns typically last 10 to 15 years or more. The material, the position in the mouth, your oral hygiene habits, and whether you grind your teeth all influence longevity.
Looking after a crown isn’t complicated:
- Brush and floss as normal. The crown itself can’t decay, but the junction between the crown and the natural tooth underneath can. Keeping that margin clean is important.
- Don’t use your teeth as tools. Opening packaging, biting nails, or chewing ice puts stress on restorations that they weren’t designed to handle.
- Wear a mouthguard if you grind. This is a big one. Grinding puts significant force through crowns — and through everything else in your mouth. If bruxism is a factor for you, a custom occlusal splint is worth the investment. It protects the crown and your other teeth.
- Come in for regular check-ups. Crowns should be reviewed at routine dental appointments to check the fit, the gum health around them, and whether any wear is occurring.
We’re QIP accredited at Smile Spot, which means our clinical processes meet independently verified standards — relevant if you’re comparing practices and want to know what quality benchmarks a clinic has committed to.
One appointment that actually fits your day
We’re open Monday to Thursday until 7pm. Most dental practices in Adelaide close at 5pm, which means getting treatment often requires taking time off work during business hours. Our evening hours exist specifically because we know that’s a barrier — and it’s a particular issue for people working across the northern suburbs, whether that’s at Technology Park Adelaide, Edinburgh RAAF, or anywhere else that keeps you busy until late afternoon.
A CEREC crown appointment at Smile Spot can run after 5pm, finish in a single visit, and have you back at your desk or at home without a second appointment hanging over the schedule. We also offer DentiCare interest-free payment plans for those thinking through the cost, and HICAPS on-the-spot claiming so your health fund benefit is processed before you leave.
If you’ve been told you need a crown and you want to understand exactly why, or you’d like to discuss your options, we’re at 1/3 Coventry Street, Mawson Lakes SA 5095.
Book at Smile Spot — call (08) 8258 0650 or book online. You can also read more about our same-day CEREC crowns and general dentistry services.
Any surgical or invasive procedure carries risks. Before proceeding, seek a second opinion from an appropriately qualified health practitioner.