Developmental disturbances of the oral and maxillofacial region; pathology of the teeth; pulpal, periapical and periodontal pathology; infections; physical and chemical injuries; allergies and immunologic diseases; benign and malignant lesions of epithelial origin; salivary gland pathology; soft tissue tumours; lymphoreticular and haematopoietic diseases; diseases and tumours of bone; odontogenic cysts and tumours; dermatologic diseases; oral manifestations of systemic diseases.