Bruxism — chronic clenching or grinding of teeth, mostly during sleep — affects 8-30% of adults. Most do not know they do it; partners or dentists usually spot it first. Over decades, the damage compounds in predictable patterns.
What grinding does mechanically
Enamel wears flat — biting surfaces lose their normal cusps and become smooth. Eventually exposes the softer dentine underneath, which wears 10x faster than enamel. Crowns and fillings crack from repeated force. Tooth roots can fracture vertically from the load. Gum recession accelerates where the force concentrates.
What grinding does to the jaw
Temporomandibular joint (TMJ) inflammation, pain and clicking. Jaw muscles hypertrophy — chronic bruxers often have visibly enlarged masseter muscles. Morning headaches, particularly at the temples, from overworked muscles.
Why most people do not know they grind
Sleep bruxism happens during REM and lighter sleep stages. No conscious awareness. Detection signs: morning jaw soreness, partner reports of teeth sounds, dentist notices wear patterns on biting surfaces, increased tooth sensitivity, gum recession in unusual patterns.
What helps
Custom occlusal guard (night guard) from a dentist — flat-plane upper appliance is the gold standard. Costs $300-600 typically. Lasts 5+ years. Drugstore boil-and-bite guards are 80% as effective at 5% of the cost; reasonable starting point.
What does not help (as much as marketed)
Stress management alone — relevant but rarely sufficient. Botox into masseter muscles — works for jaw pain and muscle bulk but does not address the wear pattern; expensive ongoing treatment. Mandibular advancement devices marketed for snoring — not designed for bruxism, can shift bite over time.
The bigger picture intervention
Identify and address sleep quality — bruxism is associated with sleep apnea, anxiety and acid reflux. Treating the underlying contributor reduces bruxism without specifically targeting the jaw. Sleep apnea workup particularly worth requesting if other symptoms present.
FAQ
Can grinding cause cavities?
Indirectly. The micro-fractures it creates in enamel can become entry points for decay.
Is bruxism reversible?
The damage to enamel is not — once worn, the surface stays worn. Stopping the grinding prevents further damage. Bonding or crowns can restore aesthetic and function.
Do mouth guards cause cavities?
No, if cleaned regularly. Build-up of plaque under a dirty guard does increase cavity risk.
Will my partner stop hearing me grind?
Yes, with a guard worn consistently. The cushioning eliminates the audible tooth-on-tooth contact.
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