Extraction is usually NOT required in Class II division II malocclusion because these cases often present with crowded incisors but reduced overjet and deep bite. The naturally retroclined upper incisors limit the need for space creation through extractions. Instead, orthodontic treatment focuses on retraction and uprighting of incisors rather than premolar extraction to relieve crowding. This contrasts with Class II division I, where extractions are frequently needed to reduce protrusion and overjet. Therefore, extractions are less common in Class II division II cases due to the different dental and skeletal relationships.

Reference: Proffit’s Contemporary Orthodontics, 6th Edition.