By Joanna M. | Director of Telehealth Clinical Operations | Fact-Checked for Clinical Accuracy
Both are clear appliances that fit over your teeth, and both are worn at night. That's where the similarity ends. The materials, thickness, and purpose are entirely different.
| Feature | Retainer | Night Guard |
|---|---|---|
| Primary purpose | Prevent teeth from shifting after braces/aligners | Protect teeth from grinding and clenching forces |
| Material thickness | 0.5-1mm (thin, precise fit) | 1.5-4mm (thick, shock-absorbing layer) |
| Who needs it | Anyone post-orthodontics | Anyone who grinds, clenches, or has TMJ symptoms |
| Lifespan (average) | 1-3 years (sooner if worn by a grinder) | 2-5 years depending on grinding intensity |
If you have ever worn braces, clear aligners (Invisalign, NewSmile, etc.), or any orthodontic device, you need a retainer. Without one, teeth begin to shift — sometimes within days of removing aligners.
A well-fitted custom clear retainer from NewSmile Canada is made from the same Essix-grade material used by dental labs — ordered from a home impression kit, without a dentist visit. Replacement retainers start at $199 CAD for a full upper and lower set (subscription: $139 CAD every six months).
What a retainer is not: a bruxism solution. If you grind your teeth and only wear a retainer to bed, you will crack, cloud, or warp it within months.
Bruxism (teeth grinding) affects an estimated 8-10% of adults in Canada. Left untreated, it causes enamel erosion, tooth fractures, TMJ dysfunction, and gum recession.
NewSmile Canada's custom night guard ships from an at-home impression kit at $199 CAD one-time (or $139 CAD every six months on subscription). Compare that to $400-$800 or more for a dentist-made guard.
The honest answer is: no, and trying to do so will cost you more in the long run. Retainers are made from thin thermoplastic calibrated for passive tooth positioning, not active force absorption. When a grinder wears a retainer to bed, it warps, clouds, or cracks within weeks to months — and your teeth still experience grinding stress.
Many post-orthodontic patients in Canada develop bruxism after treatment finishes. If you need both: wear a custom night guard every night to absorb grinding forces, and use a retainer part-time or for travel. NewSmile Canada offers both independently — see the best night guards in Canada 2026 roundup.
| Option | Retainer | Night Guard |
|---|---|---|
| Dentist-made (Canada) | $400-$900 CAD | $400-$800 CAD |
| NewSmile Canada (one-time) | $199 CAD | $199 CAD |
| NewSmile Canada (subscription) | $139 CAD / 6 months | $139 CAD / 6 months |
| Pharmacy boil-and-bite | N/A | $30-$60 CAD (poor fit) |
Custom night guards may be eligible for partial coverage under extended dental benefits in Canada. Neither retainers nor night guards qualify under CDCP. See the full guide to retainer costs in Canada.
Get a Custom Retainer or Night Guard Without a Dentist Visit
NewSmile ships lab-quality custom appliances across Canada from a simple at-home impression kit. Retainers from $199 CAD. Night guards from $199 CAD. Subscription plans at $139 CAD every six months. We ship as soon as production is complete.
No — retainers are too thin to withstand grinding forces. A custom night guard is the correct appliance for bruxism. If you have had orthodontic treatment and grind, you need both: a night guard to protect your teeth and a retainer to maintain alignment.
Common signs include waking with jaw soreness, headaches near the temples, tooth sensitivity, a partner reporting grinding sounds, and your dentist noting worn or flattened biting surfaces.
As of 2026, the CDCP does not cover custom occlusal guards (night guards) or orthodontic retainers. Extended health benefits through employers may partially cover custom guards — check under "occlusal guards" in your benefit plan booklet.
A well-made custom night guard typically lasts two to five years. Heavy grinders may wear through one in 12-18 months. NewSmile's subscription plan delivers a fresh guard every six months for $139 CAD.
A night guard does not cure TMJ dysfunction, but it reduces load on the joint during sleep. Many Canadians with TMJ-related jaw pain find significant relief from consistent night guard use.
NewSmile Canada ships custom night guards from a home impression kit — no dentist visit required. Starting at $199 CAD one-time or $139 CAD on a six-month subscription.
A sports mouth guard protects against external impacts. A night guard absorbs repetitive grinding forces during sleep. They are made from different materials and are not interchangeable.
By Joanna M. | Director of Telehealth Clinical Operations | Fact-Checked for Clinical Accuracy
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