Grinding and clenching at night is one of the most common physical carryovers of a mental health condition, and one of the least claimed. Veterans mention it to their dentist, get a night guard, and never think of it as part of their VA picture. It often is.
The legal path
Bruxism has no diagnostic code of its own. The claim runs through 38 CFR 3.310, which allows service connection for a disability caused or aggravated by an already service-connected disability. The service-connected primary is usually PTSD, anxiety, or depression; the secondary condition is the temporomandibular joint disorder and muscle pain the grinding produces, rated under Diagnostic Code 9900.
That framing matters. Filing for bruxism by name invites a denial for lack of a rateable condition. Filing for a temporomandibular joint disorder secondary to service-connected PTSD, with bruxism described as the mechanism, matches how the rating schedule is built. Our secondary conditions guide covers the other primaries that support the same claim.
What the medical opinion must do
An opinion that says PTSD causes bruxism and stops there does not survive review. A sound opinion states the conclusion in the standard language, then explains the mechanism: sustained hyperarousal and sleep fragmentation increase masticatory muscle activity at night, repeated loading inflames the muscles and the joint, and the joint changes become the disability being rated.
It should also cite the specific records relied on - the dental charting, the sleep complaints in the mental health notes, the medication list - and address the alternatives a reviewer will consider, including whether medications or an unrelated dental cause explain the findings just as well. The general standard is described in what a nexus letter is.
The records that carry the claim
A night guard fitting is the single most useful document in these claims. It is dated, objective, and usually predates the claim, which establishes chronicity. Behind it sit the wear facets, cracked or fractured teeth, abfraction lesions, and muscle tenderness noted in the dental chart, all of which our bruxism guide describes in more detail.
Mental health notes matter just as much. Entries about nightmares, hypervigilance, poor sleep, waking with headaches or jaw soreness, and morning tension tie the two conditions together in the veteran's own treatment record rather than in argument.
Where veterans start
Every case is different, and there is no obligation at any step. When veterans want to understand what their records actually support, these are the two most common starting points:
- Medical records review
A licensed physician reviews your records for a $250 flat fee and identifies which conditions the available evidence may support. The fee is refunded in full if nothing supportable is identified.
- Nexus letter
When the records support one, a licensed provider writes the medical opinion that addresses the link between your condition and your service or an already service-connected disability.
Medication is part of the picture
Several medications commonly prescribed for PTSD and depression, including selective serotonin reuptake inhibitors, are associated with sleep bruxism and with reduced salivary flow. That supports rather than undermines the claim, because medication for a service-connected condition is itself a recognized secondary pathway - the same reasoning our tooth loss guide applies to decay.
Sleep conditions in the same file
Sleep apnea, bruxism, and mental health conditions frequently appear together, and the interaction is documented in the sleep literature. If a sleep study exists, it may record bruxism episodes directly. Our sleep apnea series covers how those claims are built, and the mental health series covers the primary condition.
What a decision looks like
If service connection is granted, the percentage comes from the measured findings at the exam - jaw opening in millimeters and dietary restriction - not from how severe the grinding is. Our C&P exam guide explains what gets measured, and reading it before the appointment is worth the time.
Veterans who want to know whether their existing records already support this chain usually start with a medical records review.