Class II cavities involve which tooth surfaces?

Class II cavities specifically involve the areas on the tooth that are adjacent to neighboring teeth, focusing on the proximal surfaces. The proximal surfaces refer to the sides of the teeth that are in contact with adjacent teeth, typically occurring on molars and premolars. In addition, Class II cavities extend onto the occlusal surface, which is the top chewing surface of these back teeth.

The involvement of both the occlusal and proximal surfaces defines the nature of Class II cavities, as they are more complex than those confined to a single surface. This classification is crucial in restorative dentistry as it helps dentists to plan and execute the restoration of the teeth effectively, ensuring that both the occlusal and interproximal areas are addressed during treatment.

Other options describe surface combinations that do not fit the criteria for Class II cavities. For example, incisal and labial surfaces relate more to anterior teeth, while buccal and lingual surfaces are more characteristic of Class I cavities. The mention of facial and distal surfaces also does not accurately reflect the Class II classification, underscoring the importance of knowing tooth surface terminology in oral health and restorative practices.