ABPD QE REVIEW EXAM 2024 WITH 100% CORRECT ANSWERS

What is the purpose of the Herbst appliance?Answer - To correct skeletal class II malocclusion Displaces the mandible forward with lower dental protraction. Distalizes upper molars and restrains the maxilla Cervical-pull headgear is used for what purpose?Answer - Optimizes molar distalization and extrusion Decreases overbite (so avoid with dolichofacial patients) A point moves 0.5-1mm distal, lower face height increases High-pull headgear is used for what purpose?Answer - Optimizes restraint of maxillary growth Minimizes vertical eruptive development Enhances overbite Relatively intrudes maxillary molars (so avoid in brachyfacial patients) When is disking of primary canines indicated? How much space per side can be achieved?Answer - Less than 3-4mm of incisor crowding, laterals are actively erupting, incisors are lingually malpositioned 1-2mm per side When is extraction of the primary canines indicated?Answer - Incisor liability over 4mm Distorted incisor positioning Asymmetric ectopic loss of primary canine Placement of LLHA strongly recommended Genetic disorder Four levels of severity- perinatal, infantile, childhood, adult Premature loss of deciduous teeth (fully rooted) Abnormal cementum Abnormally large pulp chambers Deficient/defective alkaline phosphataseAnswer - Hypophosphatasia Anat