Based on the chart, what’s the class iv cavity classification

Class IV: Cavity on proximal surfaces of incisors or canines that involve the incisal angle (Class IV lesion is the larger version of Class III that covers the incisal angle) Class V: Cavity on the cervical third of the facial or lingual surfaces of any tooth (Think of the neck of the tooth

Yes they should do if insurance denys claim they have a back up to prove why procedure was medically necessary

The answer would be age 18.