A. Activator (Andresen Appliance) B. Hawley Retainer C. Begg Appliance D. Quad Helix Answer: A Explanation: The Activator is a loose-fitting, functional appliance that guides the growth of the mandible forward to correct a Class II skeletal discrepancy.
: A 45-question model paper specifically for BDS final professional exams. UHS Model Paper PDF . orthodontics mcqs pdf
Take one base PDF (e.g., from a 2010 textbook). Add a chapter from a 2022 prep book. Scan your handwritten rationales for the questions you missed. Screenshot the cephalometric tracings from your lectures. Compile all of this into a single, searchable document. Begg Appliance D
✅ As primary molars are lost, the permanent first molars drift mesially into the leeway space, helping establish a Class I molar relationship. C) Twin Block UHS Model Paper PDF
A. To expand the maxillary arch. B. To distalize molars. C. To maintain arch length and prevent mesial drift of molars. D. To correct crossbite. Answer: C Explanation: A Nance button is a passive appliance used in the mixed dentition to hold the position of the molars (anchorage) and prevent space loss after premature loss of deciduous molars.