Etiology:  Malocclusion occurs when the incisors overgrow because the mandibular and maxillary teeth are not normally aligned and do not properly occlude.

Incidence:  The incidence of malocclusion is common.

Clinical signs:  Mice may have a poor body condition and evidence of poor growth.  Incisors are overgrown and misaligned.

Diagnosis:  Malocclusion is readily diagnosed by an oral examination.