Causes of mouth closure inability include TMJ luxation, mechanical obstruction (oral foreign bodies, soft tissue swelling, neoplasia, or tooth-to-tooth contact.), maxillofacial trauma with mandibular or maxillary fractures, open- mouth jaw locking, and trigeminal neuropraxia. Palatoversion, or tooth displacement, is a developmental issue that occurs gradually and does not “suddenly” manifest without traumatic causes. This presentation describes three cases where the developmental displacement of the upper canine tooth in kittens (7 months on average) progressed to a point where acute symptoms suddenly emerged, leading to an inability to fully close their mouths.

This condition has not been previously reported in the literature. Orthodontic treatment was performed to reposition the displaced teeth, leading to a prompt recovery of normal mouth function and eating behavior. This presentation emphasizes the importance of considering palatoversion when faced with acute mouth closure inability in kittens, as it may closely mimic TMJ luxation. Early recognition and appropriate treatment can prevent unnecessary interventions and provide rapid relief for affected cats. Clinicians should be aware of this condition.