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C&P Exam Prep: Temporomandibular Disorders (TMJ)

DC 9905 dental-and-oral 38 CFR 4.150

DBQ Overview

Interview + Physical
Form Name
Temporomandibular_Disorders
Form Code
Temporomandibular_Disorders
Page Count
9
Examiner Type
Dentist / Oral Surgeon / Physician
Estimated Duration
20-30 minutes
Exam Format
Interview + Physical

What to Expect During Your Exam

Exam Overview

To document the severity of your temporomandibular disorder by measuring jaw range of motion (interincisal distance and lateral excursion), assessing pain with chewing and at rest, identifying crepitus or clicking, and evaluating functional loss including dietary restrictions - all of which drive the disability rating under DC 9905.

What the examiner evaluates:

  • Active and passive interincisal opening distance (mouth opening in millimeters)
  • Right and left lateral excursion of the jaw (in millimeters)
  • Pain on palpation of the TMJ and surrounding muscles
  • Presence and type of crepitus (grating, clicking, popping) on either side
  • Functional loss: ability to chew, bite, speak, and yawn
  • Dietary restrictions required due to jaw dysfunction (soft foods, mechanically altered, pureed)
  • DeLuca factors: pain during motion, fatigue after use, weakness, incoordination, lack of endurance
  • ROM measurements after repetitive-use testing for additional functional loss
  • Flare-up frequency, triggers, duration, and impact on jaw function
  • Associated symptoms: headaches, ear pain, tinnitus, neck pain, locking of the jaw

Exam is typically conducted in a clinical setting. The examiner will physically palpate the jaw joint, observe jaw movement, and use a millimeter ruler to measure opening and lateral movement. Per M21-1, Part IV, Subpart i, 3.B.1.m, the exam does not need to be performed by a dentist - a physician may conduct the exam. Be prepared for the examiner to ask you to open and close your mouth repeatedly to assess repetitive-use deterioration. In most U.S. states, you have the right to audio-record your C&P examination - verify your state's rules and notify the examiner before recording.

Typical duration: 20-30 minutes

Interincisal Distance (Mouth Opening)

Maximum vertical distance between upper and lower front teeth when you open your mouth as wide as possible, measured in millimeters. This is the primary metric driving DC 9905 ratings.

What to expect:

The examiner will place a ruler between your upper and lower incisors and ask you to open as wide as you can. This will be measured at rest, actively, and passively (examiner gently assists). Expect some discomfort. Do not force open beyond your pain threshold - open only as far as your condition permits on this day.

Key thresholds:

  • Greater than 40 mm — Likely 0% (normal range)
  • 31-40 mm — May support 10% rating with pain
  • 21-30 mm — Supports 20%-30% range depending on additional symptoms
  • 11-20 mm — Supports 30%-40% range
  • 0-10 mm — Supports 40%-50% range - severe limitation
  • 0 mm (complete trismus) — Supports maximum 50% rating

Tips:

  • Open only as far as your condition allows on that specific day - do not push through severe pain to appear cooperative
  • If your condition is worse on bad days, inform the examiner of your worst-day opening distance and the range you typically experience
  • If jaw locks, tell the examiner - locking episodes are a separate functional limitation that should be documented
  • Ask the examiner to note whether passive opening differs from active opening and whether pain limits the motion
  • If repetitive chewing or talking worsens your opening, make sure this is tested and documented

Pain considerations: Pain that limits mouth opening is a DeLuca factor and must be documented. Tell the examiner exactly when pain begins during opening (e.g., 'pain starts at approximately 15mm of opening') and whether the pain radiates to the ear, temple, or neck. Per M21-1, the DBQ requires documentation of pain during motion separately from the raw measurement.

Lateral Excursion (Left and Right)

Horizontal movement of the lower jaw to the left and right, measured in millimeters. Normal lateral excursion is approximately 8-12 mm per side. Reduced lateral excursion indicates joint or muscle restriction and contributes to functional limitations with chewing.

What to expect:

The examiner will ask you to move your lower jaw side to side as far as possible. Each direction is measured separately. Crepitus or clicking during lateral movement should be noted. Pain during lateral excursion is a critical finding.

Key thresholds:

  • Greater than 8 mm bilateral — Within normal limits - likely 0% in isolation
  • 4-8 mm with pain — Supports compensable rating when combined with limited opening
  • Less than 4 mm — Significant restriction - supports higher rating tiers
  • 0 mm (no lateral movement) — Severe restriction supporting maximum ratings

Tips:

  • Move only as far as your condition allows - do not force movement
  • Note whether one side is more restricted than the other and tell the examiner
  • Report any audible or palpable clicking, popping, or grinding during lateral movement
  • If lateral movement is asymmetric (jaw deviates), point this out to the examiner

Pain considerations: Pain during lateral excursion - especially with chewing motions - directly supports functional loss. The DBQ specifically asks about pain with chewing for both right and left sides. Describe the quality, location, and radiation of this pain accurately.

Repetitive-Use Testing (Post-Use ROM)

Range of motion measurements taken after repeated jaw movements (e.g., opening and closing multiple times) to determine if function deteriorates with use - a key DeLuca/Correia requirement. This tests whether your condition worsens during the day or with sustained activity such as eating a full meal.

What to expect:

The examiner may ask you to open and close your jaw repeatedly, then re-measure your opening distance and lateral excursion. Alternatively, they may ask you to report how your jaw feels after activities like eating a meal, talking for an extended period, or yawning. Post-use worsening is highly relevant to your rating.

Key thresholds:

  • Measurable decrease in ROM after repetitive use — Supports additional functional loss finding - increases rating potential
  • Pain onset or increase after repetitive use — Documents DeLuca fatigue/pain factors - important for rating accuracy

Tips:

  • Come prepared to describe your worst-day functional capacity - 'After eating a full meal, my jaw opening decreases and pain increases significantly'
  • If the examiner does not perform repetitive-use testing, politely remind them that the TMD DBQ requires post-repetitive-use ROM measurements per M21-1
  • Describe real-life analogues: 'By the end of a normal dinner, I can barely open my mouth to take another bite'

Pain considerations: Fatigue and increased pain after repetitive use are DeLuca factors that can justify a higher effective ROM limitation than the initial measurement suggests. Always report if your jaw is significantly worse after sustained use compared to the initial measurement.

Palpation for Pain and Crepitus

The examiner manually presses on the TMJ (located just in front of the ear) and surrounding muscles (masseter, temporalis, pterygoid) to detect tenderness, pain, and crepitus (grinding or crackling sensations within the joint).

What to expect:

The examiner will press their fingertips directly on the joint area and muscles. They will feel and listen for crepitus as you open and close. Report pain levels accurately - do not minimize tenderness. A 0-10 pain scale description is helpful.

Key thresholds:

  • Crepitus present (right and/or left) — Documented joint pathology - supports diagnosis and rating
  • Pain on palpation of joint — Documents pain factor for DeLuca analysis
  • Muscle tenderness on palpation — Supports functional loss from muscle involvement

Tips:

  • Tell the examiner your exact pain level (e.g., '7 out of 10') when they press on the joint
  • Indicate if the pain radiates - 'The pain goes into my ear and up my temple'
  • Crepitus you can feel but the examiner may not hear counts - describe it as 'I feel grinding/popping inside the joint when you press'
  • Note if one side is significantly more affected than the other

Pain considerations: Pain on palpation is one of the primary clinical findings the DBQ specifically captures. The DBQ has separate fields for right and left joint pain with chewing. Do not downplay tenderness - accurately report what you feel when pressure is applied.

Estimate

Rating Criteria Breakdown

50% Complete or near-complete ankylosis (immobility) of both tem ...

Complete or near-complete ankylosis (immobility) of both temporomandibular joints, with interincisal distance at or near 0 mm and complete inability to open the mouth for chewing. Maximum rating under DC 9905.

Key Symptoms

  • Interincisal opening at or near 0 mm - complete trismus or ankylosis
  • Unable to open mouth to eat; requires liquid/tube nutrition
  • Constant severe pain
  • No lateral excursion possible
  • Complete functional loss of the TMJ
  • Severe deformity or joint destruction on imaging

CFR: Maximum evaluation for TMD representing complete functional loss of both joints. This level requires documented near-complete or complete immobility of the jaw. Physician verification of feeding limitations is essential.

40% Severe limitation of jaw opening with interincisal distance ...

Severe limitation of jaw opening with interincisal distance of 0-10 mm, or restriction to pureed/liquid diet only due to inability to chew solid foods.

Key Symptoms

  • Interincisal opening 0-10 mm (severe trismus)
  • Restriction to pureed foods, liquid diet, or use of a feeding tube
  • Constant significant pain at rest and with any jaw movement
  • Near-complete loss of lateral excursion bilaterally
  • Marked jaw muscle atrophy from disuse
  • Jaw locking episodes
  • Significant impact on nutrition, speech, and quality of life

CFR: Severe TMD with near-complete limitation of motion and pureed/liquid dietary restriction. The inability to chew any solid food and severe pain at rest define this level. All dietary restrictions must be physician-verified per DC 9905.

30% Moderate-to-severe limitation of jaw motion with significant ...

Moderate-to-severe limitation of jaw motion with significant functional impairment. Opening restricted to approximately 11-20mm or dietary restriction to mechanically altered (minced/mashed) foods.

Key Symptoms

  • Interincisal opening 11-20 mm
  • Dietary restriction to mechanically altered foods (minced, mashed, finely chopped)
  • Significant pain at rest and with any jaw movement
  • Crepitus bilaterally or pronounced unilaterally
  • Markedly reduced lateral excursion
  • Flare-ups with prolonged limitation of opening
  • Impact on speech and oral hygiene

CFR: Significant TMD with mechanically altered food restriction. Per DC 9905, dietary restriction to mechanically altered foods must be recorded or verified by a physician. Ensure your treating provider documents this in medical records.

20% Moderate limitation of jaw opening with pain limiting chewin ...

Moderate limitation of jaw opening with pain limiting chewing of normal foods. Dietary restriction to soft foods. Interincisal distance in the 21-30mm range.

Key Symptoms

  • Interincisal opening approximately 21-30 mm
  • Restriction to soft foods (e.g., avoiding meat, raw vegetables, hard bread)
  • Significant pain with chewing requiring diet modification
  • Crepitus on one or both sides
  • Reduced lateral excursion with pain
  • Fatigue and pain after meals

CFR: Moderate TMD with documented soft-food dietary restriction. The restriction must be recorded or verified by a treating physician to support elevation to this level per DC 9905 notes.

10% Mild limitation of jaw opening with pain; dietary modificati ...

Mild limitation of jaw opening with pain; dietary modifications may be beginning. Interincisal distance reduced but generally above 30mm. Some pain with chewing hard foods.

Key Symptoms

  • Interincisal opening approximately 31-40 mm with pain on motion
  • Pain with chewing harder foods requiring avoidance of certain textures
  • Mild crepitus
  • Some lateral excursion restriction with discomfort
  • Occasional flare-ups with increased pain and restricted opening

CFR: Mild TMD with documented pain on motion and mild limitation. Veteran can open mouth but with discomfort; may avoid hard, chewy foods but does not require fully mechanically altered diet.

0% TMD diagnosed but no significant limitation of motion, no di ...

TMD diagnosed but no significant limitation of motion, no dietary restriction, and no measurable functional impairment beyond occasional mild discomfort.

Key Symptoms

  • Interincisal opening greater than 40 mm with minimal or no pain
  • Normal lateral excursion bilaterally
  • No dietary restrictions required
  • No crepitus or only incidental clicking without functional consequence

CFR: Diagnosis established but condition causes no compensable disability. A 0% rating still establishes service connection, which is important for future increases.

How to Describe Your Symptoms

Pain - Jaw, Face, and Referred Pain

How to describe:

Describe the exact location (in front of ear, jaw joint, jaw muscles, temple, ear canal), quality (sharp, aching, burning, throbbing), severity on a 0-10 scale both at rest and with movement, and radiation patterns. Distinguish between pain at rest versus pain with jaw motion, chewing, talking, yawning, or clenching. Specify whether pain is unilateral or bilateral.

Worst-day example:

“On my worst days, the pain in both jaw joints is a constant 8 out of 10 even at rest. When I try to open my mouth or chew anything, the pain spikes to a 10 and radiates up into my temple and into my ear canal. I cannot eat without significant pain and often skip meals because the pain of chewing is not worth it.”

What the examiner listens for:

Specific pain ratings, anatomical location, radiation, relationship to jaw movement, functional impact on eating and speaking, whether pain is bilateral or unilateral, and whether rest relieves pain.

Understatements to avoid:

Saying 'it's just a little sore' or 'I manage okay' - if pain limits your ability to eat normal food or affects your daily life, say so specifically and accurately.

Functional Loss - Eating, Speaking, and Daily Activities

How to describe:

Describe exactly what foods you cannot eat and why (e.g., 'I cannot eat anything that requires sustained chewing - steak, raw vegetables, bagels, apples'), how long you can speak before jaw fatigue sets in, whether you can yawn without pain or locking, and whether jaw problems affect your sleep (bruxism, clenching, or pain waking you).

Worst-day example:

“On bad days I can only eat soft foods like yogurt, mashed potatoes, or soup because opening my mouth wide enough to take a bite - or chewing anything firm - causes immediate intense pain and my jaw gets stuck partway open. I have avoided eating with others because it takes me so long and is so painful. I have lost weight because eating is so difficult.”

What the examiner listens for:

Specific dietary restrictions, foods avoided, weight loss, social impact of eating difficulties, speech limitations, impact on oral hygiene, and whether restrictions are consistent with the measured ROM.

Understatements to avoid:

Simply saying 'I eat soft foods sometimes' - be specific about what you cannot eat and why, and describe how this affects your nutrition and quality of life on your worst days.

Range of Motion - Worst-Day Reporting

How to describe:

Report your typical worst-day opening distance in descriptive terms if you do not have a millimeter measurement (e.g., 'On bad days I can barely fit two fingers between my teeth,' 'I cannot open wide enough to take a bite of a sandwich'). Two adult finger-widths is approximately 35-40 mm; one finger-width is approximately 15-20 mm; minimal opening is less than 10 mm.

Worst-day example:

“My worst days, which happen several times a month, I can barely open my mouth enough to slip a finger in - maybe half an inch or less. My jaw clicks loudly and then sometimes locks in a partially open position. On average days it is better but still very limited compared to normal.”

What the examiner listens for:

The range of daily variation in opening distance, triggers that worsen restriction, whether the exam-day measurement represents a typical day or a better-than-average day, and the frequency of worst-day episodes.

Understatements to avoid:

Assuming the examiner only cares about what they measure that day. The exam may catch you on a better-than-average day. Proactively state: 'Today is actually not my worst day - on bad days my opening is significantly more limited than this.'

Flare-Ups - Frequency, Triggers, Duration, Severity

How to describe:

Describe how often flare-ups occur (daily, weekly, monthly), what triggers them (stress, eating hard foods, cold weather, extended talking, dental procedures), how long they last (hours, days), and what happens during a flare-up (severe pain, jaw locking, inability to eat, swelling, headaches). Per M21-1, the DBQ specifically requires documentation of flare-up impact on TMJ function.

Worst-day example:

“I have full flare-ups approximately two to three times per month that last two to four days each. During a flare-up, my jaw opening drops to almost nothing, I can only take liquids, and the pain radiates from my jaw up to my temple and down my neck. I am unable to work, socialize, or eat normally. Stress and eating anything chewy reliably trigger these episodes.”

What the examiner listens for:

Specific frequency, documented triggers, functional impact during flare-ups (including reduction in ROM beyond baseline), duration, and whether flare-ups require additional medical intervention.

Understatements to avoid:

Describing flare-ups vaguely as 'sometimes it gets worse.' Quantify the frequency, describe the functional impact in concrete terms, and connect each flare-up to specific limitations.

DeLuca Factors - Fatigue, Weakness, Incoordination After Use

How to describe:

Describe how your jaw function deteriorates with prolonged use. For example: jaw fatigue after eating a full meal, weakness in jaw muscles making it hard to chew firm foods, incoordination causing jaw to deviate or catch during opening, and lack of endurance for sustained talking or chewing.

Worst-day example:

“By the time I finish a soft meal, my jaw muscles are fatigued and trembling. My opening decreases noticeably after eating - I start a meal being able to open maybe an inch but by the end I can barely open at all. I experience a clicking, catching sensation when I try to open after sustained use, like the joint is not tracking properly.”

What the examiner listens for:

Evidence that repeated or sustained use worsens ROM and pain beyond the initial measurement, specific descriptions of muscle fatigue and incoordination, and real-world functional consequences of post-use deterioration.

Understatements to avoid:

Not mentioning post-use deterioration because the examiner did not specifically ask. These DeLuca factors must be volunteered if not asked, as they are required elements of the TMD DBQ per M21-1.

Crepitus, Clicking, Locking - Joint Sounds and Mechanics

How to describe:

Describe whether you hear or feel clicking, popping, or grinding (crepitus) in one or both jaw joints during opening, closing, or lateral movement. Note if the jaw deviates or deflects to one side. Describe any episodes of jaw locking (open or closed) - how often they occur, how long the jaw stays locked, and how you resolve it.

Worst-day example:

“Every time I open my mouth I hear and feel a loud pop in my right jaw joint, and a grinding sensation in my left. My jaw always deviates to the left when I open. I have had my jaw lock in a half-open position approximately twice per month for the past year - I have to manually push it back into place, which is extremely painful.”

What the examiner listens for:

Whether crepitus is audible or only palpable, which side or sides are affected, whether locking occurs and at what frequency, and whether the jaw deviates during opening (suggesting disc displacement or condylar asymmetry).

Understatements to avoid:

Minimizing joint sounds as 'just clicking' - crepitus is a clinically significant finding. Also do not fail to mention jaw locking episodes, which represent significant functional loss events.

Common Mistakes to Avoid

Prep Checklist

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Before Your Exam

Day Of

During the Exam

After the Exam

Your Rights During a C&P Exam

  • You have the right to a thorough, adequate C&P examination - if the examiner fails to address required DBQ elements (flare-ups, repetitive-use testing, DeLuca factors, dietary restrictions per M21-1), the exam report can be challenged as inadequate and a new exam requested.
  • In most U.S. states, you have the right to audio-record your C&P examination. Research your specific state's rules before the exam, notify the examiner at the start, and keep a copy of the recording.
  • You have the right to have a representative (VSO, accredited claims agent, or attorney) accompany you to the exam in most circumstances - check with your VSO in advance.
  • You have the right to request a copy of your completed C&P examination report through MyHealtheVet, your VSO, or a FOIA/Privacy Act request. Review it for accuracy and completeness.
  • You have the right to submit additional evidence (lay statements, buddy statements, private medical opinions, treatment records) before a rating decision is issued to supplement or correct the C&P exam record.
  • If the C&P examiner's report is inadequate, negative, or clearly inconsistent with your documented symptoms, you have the right to challenge it by requesting a new examination, submitting a private independent medical opinion (IMO), or obtaining a nexus letter from a treating provider.
  • Per DC 9905, dietary restrictions used to support a higher rating must be recorded or verified by a physician - you have the right to ensure your treating provider documents this in your medical records before your exam.
  • You have the right to appeal a rating decision you believe is incorrect through the direct review, evidence submission, or hearing lanes under the AMA (Appeals Modernization Act), including requesting a higher-level review or filing a Board of Veterans' Appeals appeal.
  • The VA has a duty to assist you in developing your claim, which includes ordering an adequate C&P examination and obtaining relevant medical records. If the VA fails in this duty, it is grounds for remand or appeal.
  • Per the benefit of the doubt standard (38 CFR - 3.102), when there is an approximate balance of positive and negative evidence regarding a material fact, the benefit of the doubt must be given to the claimant. You are not required to prove your case beyond a reasonable doubt.

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This C&P exam preparation guide is for educational purposes only and does not constitute legal, medical, or claims advice. Always consult with a qualified Veterans Service Organization (VSO) representative or VA-accredited attorney for guidance specific to your claim. Never exaggerate, minimize, or fabricate symptoms during a C&P examination.