Bruxism — clenching or grinding the teeth — generates forces several times higher than normal chewing. Natural teeth absorb some of this force through the periodontal ligament. Dental implants have no ligament. Force transmits directly into the bone and the prosthetic. Long-term, unchecked bruxism is one of the major causes of implant and prosthetic failure.

How Bruxism Damages Implants

Prosthetic fracture — porcelain chipping, zirconia crown fracture, acrylic tooth fracture in full-arch bridges
Abutment screw loosening and fracture — the screw fatigues under cyclic loading
Marginal bone loss — the bone around the implant responds to excess force with resorption
Implant fracture — rare but catastrophic; the titanium fixture itself fails
Accelerated peri-implantitis — overloaded implants accumulate bone loss faster when infection is also present

Are You a Bruxer?

Many patients don’t realize they grind at night. Clues include:

Flat, worn edges on the canines and incisors
Waking with jaw soreness or temporal headaches
Hypertrophied (enlarged) masseter muscles
Sensitive teeth without decay
Linea alba — a white line on the inside of the cheek where teeth press
Partner reports nighttime grinding sounds

Modified Implant Planning for Bruxers

Wider-diameter implants to distribute load across more surface area
More implants for full-arch cases — 6 rather than 4 where anatomy permits
Monolithic zirconia prosthetics rather than layered ceramics (layered porcelain chips easily under grinding)
Reduced cusp heights in the occlusal design to reduce lateral forces
Careful occlusal scheme with group function or balanced occlusion rather than pointed cuspid-guided occlusion

The Non-Negotiable: Night Guard

Patients with any history of bruxism get a custom hard-acrylic night guard with their final prosthesis. Worn every night, it absorbs the grinding forces that would otherwise transmit through implants. Skipping the night guard is the single most common cause of implant-prosthetic failure in bruxers.

Should Severe Bruxers Skip Implants?

No — bruxism is not a contraindication to implants. But it demands respect in the planning. A bruxer planned correctly (right implant count, right material, strict night-guard compliance) can have implants that last decades. A bruxer treated as a non-bruxer loses prosthetics and implants prematurely.

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