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9904
§ 4.150 Schedule of ratings—dental and oral conditions.

Lower jaw fracture healed improperly

A broken lower jawbone that healed in an incorrect position, causing misalignment or deformity.

What the rating means

A malunion of the mandible means your lower jaw fractured and healed out of its proper position. VA rates this condition based on whether that displacement has caused an open bite — a gap between your upper and lower teeth when your mouth is closed — and, if so, how severe that gap is.

A 20% rating applies when displacement causes a severe anterior or posterior open bite. A 10% rating applies when displacement causes a moderate anterior or posterior open bite. A 0% rating applies when displacement is present but does not cause an anterior or posterior open bite.

If you also have loss of vocal articulation, loss of smell, loss of taste, neurological impairment, respiratory dysfunction, or other related impairments, VA evaluates each of those separately under its own diagnostic code and combines them under § 4.25.

Evidence that helps

Diagnostic imaging is central to this rating. VA recognizes conventional X-rays, CT scans, MRI, PET scans, radionuclide bone scans, and ultrasonography as acceptable imaging studies. These images can show how the mandible healed and the degree of bony displacement.

A dental or medical examination that documents the presence and character of an open bite — whether anterior (front of the mouth) or posterior (back of the mouth) — and describes it as moderate or severe directly ties to the 10% and 20% rating levels. Records noting that displacement exists without any resulting open bite support the 0% level.

Statements from you or treating providers describing difficulty biting, chewing, or closing your mouth can help show the functional impact. Treatment records, surgical notes from the original fracture care, and follow-up dental or oral surgery notes that track how the jaw healed over time can all help establish the degree of displacement and any resulting open bite.

Secondary conditions

Conditions that are often caused or made worse by this one. If you have any of these, they may be claimable as secondary service connection.