What to ask before replacing a worn night guard
A guard that is worn through, cracked, rough-edged, loose, or no longer seats fully usually should be replaced, but the wear itself is information. How fast it wore, where the deepest spots are and whether the fit changed all point to how hard you grind and whether your teeth or dental work have changed. A replacement visit should start with a check of the teeth, the bite and the jaw muscles and joints rather than a copy of the old guard.
What changes the answer
New crowns, veneers, implants or fillings since the guard was made; new tooth wear, chips or sensitivity; jaw soreness or clicking; snoring or sleep concerns, which belong with a physician; and whether the old guard was soft or hard, upper or lower.
What the wear pattern can suggest
| Finding on the old guard | What it may mean |
|---|---|
| Worn through in months | Heavy grinding; a harder or thicker design may be discussed |
| Deep spots on one side | Uneven loading; bite check |
| Cracked | Material or thickness; clenching |
| No longer seats | Teeth or restorations have changed |
| Chewed edges | Possibly a soft guard that invites chewing |
The National Institute of Dental and Craniofacial Research describes guards as protecting teeth from grinding damage, not stopping the grinding (NIDCR); the Merck Manual notes guards wear and need checking (Merck).
Questions to ask
- What does the wear on my old guard tell you?
- Have my teeth or restorations changed since it was made?
- Hard, soft or dual-layer; upper or lower; why?
- Should the new guard be designed around any planned dental work?
- How often should it be checked?
- Is there anything about my sleep that should go to my physician?
Caring for the new one
Rinse and brush with a soft brush and mild cleaner; no hot water; store dry; bring it to every dental visit.
Next step: Request a consultation or call (805) 565-5111. A request is not a confirmed appointment; the office confirms times during its listed hours (Monday to Thursday, 8 am to 5 pm, plus select Fridays).
Guard-replacement checklist
Old guard
- Worn through / cracked / rough / loose / won't seat (circle)
- How old: ________
- Where the deepest wear is: ________
Since it was made
- New dental work
- New tooth wear, chips or sensitivity
- Jaw soreness or clicking
- Snoring or sleep concerns (tell physician)
Ask: design and material for the new guard; check interval; any planned dental work to sequence first.
Guides are general education; an examination is needed for individual advice.
Sources
- Bruxism — National Institute of Dental and Craniofacial Research
- Teeth Grinding (Hennessy BJ, reviewed Mar 2026) — Merck Manual Consumer Version
Sources were current when this guide was last updated.
Educational content, not a diagnosis. Please contact the studio to discuss your own situation.