Your toothbrush works hard to keep your smile clean — but are you replacing it as often as you should?
Most people don’t give their toothbrush much thought until it looks worn out. But using an old or frayed brush can affect your oral hygiene more than you might think.
Here’s how often to replace your toothbrush, why it matters, and what to watch for between swaps.
The Quick Answer: Every 3 to 4 Months
The Canadian Dental Association (CDA) recommends replacing your toothbrush every three to four months — or sooner if the bristles become frayed or worn out.
This applies to:
- Manual toothbrushes
- Electric toothbrush heads (yes, those need changing too!)
Worn-out bristles don’t clean your teeth as effectively, and can irritate your gums or miss plaque and food debris — increasing your risk of cavities and gum disease.
When to Replace It Sooner
Sometimes, you should replace your toothbrush before the 3-month mark, such as when:
- ✅ The bristles are frayed, bent, or splayed out
- ✅ You’ve just been sick (cold, flu, COVID-19, strep throat, etc.)
- ✅ Your toothbrush smells or looks discoloured
- ✅ You’ve dropped it in an unsanitary place
- ✅ Your toothbrush has buildup that doesn’t rinse away
Children’s toothbrushes also tend to wear out faster, especially if they brush enthusiastically — so check them often!
Why Changing Your Toothbrush Matters
A fresh toothbrush means:
- Better plaque removal
- Lower risk of gum irritation
- Fewer bacteria lingering in your brush
- More effective cleaning — which supports your overall health
Using an old toothbrush may feel familiar, but it won’t do the job properly — and your smile deserves better.
How to Keep Your Toothbrush Clean Between Replacements
- Rinse thoroughly after each use
- Store it upright and uncovered to air-dry
- Keep brushes separated to avoid cross-contamination
- Never share your toothbrush — even with family
You don’t need to boil it or microwave it (in fact, that could damage it). Just keep it dry and clean!
Bonus Tip: Set a Reminder!
If you forget when you last swapped out your brush, try:
- Replacing it at the start of each season
- Writing the date on the handle with a permanent marker
- Setting a calendar alert or notification on your phone
- Using an electric toothbrush that tracks replacement or offers auto-ship refills
Final Thoughts
Replacing your toothbrush every 3 to 4 months is a small habit that makes a big impact on your oral health. Fresh bristles = cleaner teeth, healthier gums, and better breath.
Need help choosing the right toothbrush? We’ve got you covered.
At your next check-up, we’ll recommend the best brush (manual or electric) for your smile — and make sure your brushing technique is right on track. Book your visit today and let’s keep your oral hygiene routine fresh.