Bruxism secondary to PTSD: how the VA rates teeth grinding

A cracked night guard is not evidence of anything on its own. A dentist who wrote down when the grinding started, and a mental health record that lines up with it, is.

That is most of what separates a bruxism secondary claim that holds up from one that does not. Secondary conditions are consistently the most-missed money in a VA claim - not because the pathway is obscure, but because nobody thinks to connect a dental problem to a mental health rating until someone points out that the VA already does.

Does the VA rate bruxism as its own condition?

No. There is no diagnostic code for bruxism - teeth grinding or jaw clenching - anywhere in 38 CFR § 4.150, the dental and oral conditions schedule. On its own, grinding your teeth is a symptom, not a ratable disability.

What gets rated is the damage it does. When bruxism restricts how far the jaw opens or forces a softer diet, that lands under Diagnostic Code 9905 - temporomandibular joint dysfunction, or TMJ. The rating is not about the grinding itself. It is about what the grinding has cost the joint.

How does bruxism connect to PTSD?

Mechanically, through sustained muscle tension. PTSD keeps the body in a state of physiological alert - the same hyperarousal that shows up as an exaggerated startle response or trouble sleeping also keeps the jaw and facial muscles clenched well past the point a relaxed nervous system would let go, whether the veteran is awake or asleep at the time.

The research backs this up specifically in veterans. A 2023 systematic review and meta-analysis of studies in war veterans found signs and symptoms of temporomandibular disorder in 56.2% of veterans exposed to combat, compared with 20.18% of veterans who were not - a relative risk of 2.21 tied to a PTSD diagnosis (Minervini et al., Journal of Oral Rehabilitation, 2023; PubMed). An earlier study of Croatian war veterans found jaw-region pain in roughly one in ten veterans with PTSD. Neither of those numbers decides your claim - the VA still needs your own record - but they explain why a rater is not being asked to accept something implausible.

That is the argument 38 CFR § 3.310 asks for in any secondary claim: that a service-connected condition, here PTSD, caused or is aggravating a second condition. Our secondary conditions guide covers that standard in general; the PTSD secondary roundup covers bruxism as one of thirteen documented pathways, sleep apnea and hypertension among the rest. This post stays with bruxism and TMJ specifically, because the evidence it needs looks different from any of those.

What rating does bruxism/TMJ get?

Under DC 9905, based on two measurements: how far the jaw opens (inter-incisal range, in millimeters) and whether that forces a softer diet.

Normal opening runs 35-50 mm, so every tier on this table describes a real, measurable restriction, not a subjective complaint. A 50% rating exists above 40%, but it is not simply a smaller opening with a stricter diet - it requires loss of roughly half or more of the jaw joint's own bone structure alongside severe restriction, which is a different clinical picture from bruxism wearing down a joint through grinding alone. Most bruxism-driven TMJ claims top out in the 10-40% range for exactly that reason.

Only one direction of motion gets rated at a time. If both vertical opening and lateral excursion are restricted, the VA uses whichever produces the higher percentage, not both added together.

What evidence does a claim like this need?

Three things, in order of how often files are missing them:

A dental or TMJ exam with a millimeter measurement. "Limited opening" is not a rating criterion. 22 millimeters is. Without a number, there is nothing for DC 9905 to apply to.

Dental records that predate the claim. A night-guard prescription, a note about grinding damage on a routine cleaning, a crown replaced after cracking - these establish that the condition existed and roughly when, which matters for connecting it to when PTSD symptoms started.

A nexus opinion naming the mechanism. Not "the veteran has PTSD and TMJ," but a statement that the sustained muscle tension and clenching PTSD produces is at least as likely as not the cause, or is aggravating a TMJ condition that already existed. What a nexus letter needs to say applies here the same as any secondary claim - it is the one document a rater cannot fill in from the rest of the file.

A personal statement helps carry the gap between the dental record and the mental health record: when the grinding started or worsened, what it costs day to day, whether a partner has mentioned hearing it at night. What to write in a personal statement covers how to say that without overreaching into a diagnosis that is not yours to make.

Checking what else PTSD might be connected to

Bruxism is one of thirteen documented pathways from PTSD in our data, and it is one of the easier ones to miss, because a dental problem does not read as a mental-health claim to most veterans filling out a form. It is rarely the only one that applies.

Working out which of the rest do means checking each PTSD symptom against a body of medical literature by hand, one condition at a time. Our Secondary Condition Analyzer does that lookup instead - it maps every documented primary-to-secondary link in our data, bruxism included, with the medical reasoning behind each one, starting from a condition already on your record. You still decide what to file. The tool's job is making sure the list you are deciding from is not shorter than the one that actually applies to you.

Bottom line

Bruxism does not get its own VA rating, and grinding your teeth by itself proves nothing. What proves something is a millimeter measurement, a dental record with a date on it, and a nexus opinion willing to say the two conditions are connected. The six-step path is where to work through gathering that evidence in order, alongside anything else PTSD may have carried with it.