1. In an infant, the gum pad is separated from palate by: Dental groove Lateral sulcus Transverse groove Gingival groove 2. A tooth undergoing orthodontic tooth movement, the tension side will show: Widened PDL space Overall narrowing of PDL space on both sides Fuzziness of lamina dura Narrowed PDL space 3. Best time to modify growth is: Late mixed dentition Permanent dentition Primary dentition Early mixed dentition 4. Spheno-occipital synchondroses fuses by what age: 13 years 3 years 9 years 16 years 5. Model diagnostic setup for planning clear aligners in 1945 was given by: Rickets Kesling Tweed Angle 6. Superimposition in cephalometric studies is done from Registration point. This demonstrates best: Growth of structures at that point All of the above Growth of structures farthest from that point Growth of structures nearest from that point 7. Mesioangular ectopic eruption of a permanent mandibular first molar causing resorption of distal surfaces of the roots of the primary 2nd molar should be treated by: Use of a brass wire to move the permanent molar distally Disking of the distal surface of the primary second molar Removing the soft tissue overlying the occlusal surface of permanent molar Extracting the primary second molar 8. Facial plane is measured from nasion to: Menton Pogonion Basion Gonion 9. One of the greatest advantages of using extra-oral anchorage is that: More force can be applied. It has a direct reciprocal action on the opposing arch. It can be used for all types of malocclusion. It permits the posterior movement of teeth in one arch without adversely disturbing the opposite arch. 10. Plane of reference used in transverse direction in WITS analysis: Frankfurt horizontal plane Functional occlusal plane Sella-nasion plane Palatal plane 11. Facial profile of a child with a habit of thumb sucking: Convex and long face Convex and short face Concave and short face Concave and long face 12. Collumn angle is increased in Class I Class II Div 1 Class II Div 2 Class III 13. Branch of orthodontics concerned with management of teeth in mixed dentition period is called: Corrective orthodontics Surgical orthodontics Interceptive orthodontics Preventive orthodontics 14. The most common cause of malocclusion with a Class I molar relationship is a thumbsucking habit. crossbite in the posterior segments. tooth size and jaw size discrepancy. improper eruption of permanent first molars. 15. Serial extraction procedures involve: Orderly removal of selected primary and permanent teeth in a single sitting Orderly removal of selected primary and permanent teeth in a predetermined sequence Orderly sequential removal of selected primary teeth only Orderly and sequential removal of selected permanent teeth only 16. Moyers D type CLASS II malocclusion is Retrognathic Maxilla / Retrognathic Mandible Orthognathic Maxilla / Retrognathic Mandible Prognathic Maxilla / Retrognathic Mandible Orthognathic Maxilla / Orthognathic Mandible 17. Which of these is most promising soft tissue investigation: Poor man cephalometry Stereophotogrammetry Tc scan Barium Meal 18. According to Simon classification, movement of teeth towards Frankfort plane is called: Retraction Abstraction Protraction Attraction 19. Once bone is formed, it grows by: appositional growth only degenerative changes into bony structures interstitial growth only both appositional and interstitial growth 20. In a mouth breather, tonicity of upper lip is Slightly affected Decreased Increased No change Loading … Question 1 of 20
