Malocclusion is a misalignment of the teeth, but then the malocclusion typically allows the teeth to overgrow in the front. A malocclusion can be an ongoing problems due to congenital misalignment, or can be fixed by filing down the teeth if it's been caused by poor husbandry.
Jess, fixing teeth problem like this isn't overly dangerous to the pig if the vet is knowledgeable. We've never lost a pig to anesthetic during surgery.
We are as gods to the beasts of the fields. We order the time o' their birth and the time o' their death. Between times, we ha' a duty. - Terry Pratchett.
"Men have forgotten this truth", said the fox, "But you must not forget it. You become responsible, forever, for what you have tamed. - Antoine de Saint-Exupéry