Think of a door that still opens, but never all the way after the frame gets bent. It works, just not like it used to. In legal and insurance settings, permanent partial disability means a lasting loss of function in part of the body, or a lasting reduction in a person's ability to work, after an injury has healed as much as it is going to heal. "Permanent" means the condition is not expected to fully go away. "Partial" means the person is not completely disabled; they still have some use or earning ability.

This matters because a worker can be back on the job and still have a real, measurable loss. Maybe a shoulder never regains full strength, a hand loses grip, or a back injury limits lifting on icy loading docks or long shifts in a warehouse. A permanent partial disability finding can affect cash benefits, work restrictions, job retraining, and settlement value. Medical records, an impairment rating, and proof of lost earning capacity often become central.

In Maine, these issues are handled under the Maine Workers' Compensation Act, Title 39-A (1992), through the Maine Workers' Compensation Board. Maine often uses the related term permanent impairment, especially once a worker reaches maximum medical improvement. Disputes can arise over the rating, whether the worker can return to the same job, and whether ongoing wage-loss benefits are owed.