Most cavities don’t announce themselves. By the time a tooth actually hurts, decay has usually been working quietly for months — sometimes years. That’s the single most common thing we find ourselves explaining at Burnaby South Dental, our Highgate clinic at 6975 Kingsway: the best time to treat a cavity is when you can’t feel it yet.
If you live around Highgate Village, Middlegate, or anywhere along Kingsway in South Burnaby and you’ve been wondering whether that odd twinge or dark spot is “something,” this guide walks you through how cavities start, the early signs worth acting on, what a modern tooth-coloured filling is actually like, and what it costs — including how the Canadian Dental Care Plan (CDCP) fits in.
How a Cavity Actually Forms
A cavity is the end result of a slow chemical process. Bacteria in plaque feed on sugars and starches — the bubble tea on Kingsway, the pastry with your coffee at Highgate Village, the kids’ juice boxes — and produce acid. That acid softens the outer enamel of the tooth. Enamel can repair itself in the very early stages with help from fluoride and saliva, but once the acid breaks through and creates a true hole, the tooth cannot heal on its own. Decay then moves faster, because the inner layer (dentin) is softer than enamel.
That’s why timing matters so much. A cavity caught early is a small, inexpensive filling done in one visit. The same cavity ignored for a year can become a root canal and crown — or an extraction.
Early Warning Signs You Shouldn’t Ignore
The tricky part is that early cavities are usually painless. Here’s what we tell patients in Burnaby to watch for, roughly in the order things tend to progress. A chalky white or brown spot on a tooth is often the first visible sign of enamel breaking down. Sensitivity to sweets — a brief zing when you eat something sugary — frequently shows up before temperature sensitivity does. Sensitivity to cold or hot that lingers, food repeatedly catching between the same two teeth, a rough edge your tongue keeps finding, or a bad taste that doesn’t go away with brushing are all signs decay may have moved deeper. And a visible hole or an ache when biting down means it’s time to call us promptly, not at your next checkup.
If you’re already dealing with sharp, spontaneous pain that wakes you at night, that’s beyond “early warning” territory — see our dental emergency services and call us at (604) 540-6000 the same day.
One more note: sensitivity doesn’t always mean a cavity. Gum recession, grinding, and worn enamel cause similar symptoms — we covered the differences in our post on sensitive teeth in Burnaby. The only way to know for sure is an exam and, when needed, an X-ray, since cavities between teeth are invisible to the naked eye.
What Getting a Tooth-Coloured Filling Is Really Like
Many patients put off treatment because they’re imagining fillings from decades ago. Here’s what actually happens at our Highgate clinic today.
First, we numb the area thoroughly — and we don’t start until you’re comfortable. Our team is known for gentle, painless treatment, and if dental visits make you anxious, tell us; we work with nervous patients every day. Next, we remove only the decayed portion of the tooth, keeping as much healthy structure as possible. Then we place a composite resin filling that’s matched to the shade of your tooth, shape it, harden it with a curing light, and polish it so your bite feels natural. A typical single filling takes 30 to 60 minutes, and you walk out with a tooth that looks like nothing ever happened.
Composite (white) fillings bond directly to the tooth, require less drilling than old silver amalgam, and are virtually invisible. For most cavities in South Burnaby patients we see, they’re the standard of care as part of our general dentistry services.
What Does a Filling Cost in Burnaby?
The cost of a filling in BC depends on the size of the cavity and how many surfaces of the tooth are involved. A small one-surface composite filling costs considerably less than a large multi-surface restoration — one more reason early treatment pays off. We follow the BC dental fee guide, and we’ll always give you the cost before any work begins.
If you have workplace insurance, fillings are typically well covered as basic restorative care. And if you don’t have private insurance, you may qualify for the Canadian Dental Care Plan (CDCP) — which covers fillings as a basic service. Burnaby South Dental accepts CDCP, and our front desk can help you understand your coverage and even guide you through applying. We wrote a full breakdown in our CDCP in Burnaby guide.
How to Stop Cavities Before They Start
Prevention is boring advice until you realize it’s the difference between a free-with-insurance checkup and a root canal. Brush twice daily with a fluoride toothpaste, floss once a day (cavities between teeth are the ones you can’t see coming), be strategic about sugary drinks — sipping one bubble tea over two hours bathes your teeth in acid far longer than finishing it in ten minutes — and drink water after snacks when you can’t brush. Regular checkups and cleanings every six months let us catch enamel changes while they’re still reversible, and preventative treatments like fluoride varnish and sealants add serious protection, especially for kids and teens.
Frequently Asked Questions
Can a cavity go away on its own?
Very early enamel demineralization (a white spot) can sometimes be halted and remineralized with fluoride and improved habits. But once a true hole forms, no — it will only grow. A filling is the fix.
Does getting a filling hurt?
With modern anesthetic, you shouldn’t feel pain during the procedure — most patients tell us the worst part was the worrying beforehand. Mild sensitivity for a few days afterward is normal and fades.
How long do tooth-coloured fillings last?
Typically 7 to 10 years or longer with good hygiene and regular checkups. We inspect your existing fillings at every visit.
Do you take new patients in Burnaby?
Yes — Burnaby South Dental welcomes new patients from Highgate, Middlegate, Edmonds, Metrotown, and across South Burnaby. We’re open Monday to Saturday, 9:30 am to 5:00 pm, and we accept CDCP.
Think You Might Have a Cavity? Don’t Wait for It to Hurt
The smallest cavity we ever fix is always the one someone came in for “just to be safe.” If you’ve noticed a spot, a snag, or a twinge — or it’s simply been more than six months since your last checkup — we’d love to see you.
Burnaby South Dental — your neighbourhood dentist in Highgate, serving Middlegate and all of South Burnaby.
📍 6975 Kingsway #2, Burnaby, BC | 📞 (604) 540-6000 | 🕘 Mon–Sat, 9:30 am – 5:00 pm
