What distinguishes a Class IV cavity?

A Class IV cavity is characterized by caries that affect the proximal surfaces of anterior teeth, particularly involving the incisal angles. This type of cavity is specific to the front teeth (incisors and sometimes canines) and indicates decay that not only impacts the flat surfaces of these teeth but also the edges where the biting surfaces meet. The involvement of the incisal angles is crucial, as it differentiates Class IV from other classes of cavities, such as Class I, which is limited to the occlusal surfaces, and Class II, which pertains to the proximal surfaces of posterior teeth.

This distinction is important in dental nursing because it affects the treatment approach, including the design of restorations and techniques employed during dental procedures. Understanding these classifications helps ensure appropriate care and the prevention of future dental issues.