Loss of the bony roof of the mouth that separates the mouth from the nasal cavity.
Medical records documenting the extent of hard palate loss are central to your rating. Surgical reports, pathology records, and treatment notes that describe how much tissue was removed or destroyed help establish whether the loss covers half or more of the hard palate. Diagnostic imaging such as X-rays, CT scans, MRI, or other studies can show the size and boundaries of the defect. Records from your prosthodontist or dentist are important for showing whether the defect is replaceable by a prosthesis and, if a prosthesis was made, how well it fits and functions. If a prosthesis was attempted but cannot adequately replace the lost structure, documentation from the treating provider explaining why it is not a functional replacement supports the higher rating levels. Statements from you describing how the loss affects eating, speaking, or daily life can also help give context to the clinical findings, particularly when combined with provider notes that confirm those functional effects.
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.