You searched for: “malocclusions
malocclusion (mal" uh KLOO zhuhn) (s) (noun), malocclusions (pl)
Faulty alignment of the teeth: Eugene's neighbor had to wear a retainer to overcome the malocclusions of her teeth so she could chew her food properly.

The antonym for malocclusion is the rarely used term of "benocclusion" or "good alignments of the teeth.