Which combination best describes aetiology for Class II/2 malocclusion as per the material?

• A. Respiratory disorders
• B. Infantile swallowing
• C. Premature loss of milk teeth
• D. Hereditary nature of the pathology

Answer: (D)

The primary factor being tested is the hereditary basis of this malocclusion. Class II/2 tends to run in families, with a genetic influence on the growth relationship of the jaws and on the inclination of the upper incisors, leading to the deep bite and retroclined central incisors that characterize this pattern. Other factors like mouth breathing, infantile swallowing, or premature loss of deciduous teeth can affect occlusion in general, but they are not the main etiology for Class II/2 and do not explain the typical dental and skeletal features seen in this pattern.