1. Which is the most stable and the most often used plane for the superimposition of lateral cephalogram for studying the growth of a child?S-N planeMandibular planeFrankfort planeOcclusal planeQuestion 1 of 20 2. The best space maintainer to prevent the lingual collapse that often occurs following the early loss of a mandibular primary canine is alingual arch.band and loop space maintainer.Nance expansion arch.distal shoe space maintainer.Question 2 of 20 3. The treatment of choice for a first molar erupting ectopically towards the mesial in an intact arch without causing excessive resorption of the primary molar roots isDisk the distal surface of primary molarPlace a brass separating wire to move the permanent molar distallyExtract the involved primary molarWait for the exfoliation of primary molarQuestion 3 of 20 4. The lowest incidence of cleft palate is seen in which of the following:NegroesIndiansAfghansMongloidQuestion 4 of 20 5. Pitch of the hyrax screw is?1.2 mm0.5 mm0.8 mm0.25 mmQuestion 5 of 20 6. When a simple tipping force is applied to the crown of a single-rooted tooth, the centre of rotation is locatedat the apex.within the apical half of the root.within the cervical one third of the root.at the cervical line.Question 6 of 20 7. X-occlusion is commonly found among:African populationOriental populationAustralian arboriginesSouth Pacific islandersQuestion 7 of 20 8. All of the following are advantages of the indirect method of bonding brackets to a tooth over the direct method EXCEPT one. Which one is the EXCEPTION?Reduced chair-side timeMore precise location of brackets possible in the laboratoryLess technique sensitiveControlled thickness of the resin between the tooth and the bracket interfaceQuestion 8 of 20 9. Key ridge is present in:MaxillaTemporal boneZygomatic boneMandibleQuestion 9 of 20 10. Which is the first titanium alloy introduced into contemporary orthodonticsAll came to orthodontic practice same timeNiTiAlpha titaniumBeta titaniumQuestion 10 of 20 11. The initial sign of sexual maturity in boys is usuallyChange in voiceDevelopment of Adam's appleFat spurtAppearance of facial hairQuestion 11 of 20 12. In a tooth with alveolar bone resorption what will be the change in center of resistance?It will shift apicallyIt will move outside the toothNo changeIt will shift coronallyQuestion 12 of 20 13. Bodily movement is seen in:Simple anchorageReciprocal anchorageStationary anchorageInter maxillaryQuestion 13 of 20 14. Bien theory is related to:Bone regenerationOsteomyelitisTooth movementOsteitisQuestion 14 of 20 15. Which of the following may cause extrusion of the maxillary first molars which can cause an open bite?Cervical-pull headgearStraight-pull headgearHigh-pull headgearReverse-pull headgearQuestion 15 of 20 16. Which type of malocclusion should be corrected as early as possible?Cross-bite associated with a functional shift of the mandible from initial contact to maximum intercuspation.Anterior open bite associated with a lip or digit sucking habit.Class II Division 1 associated with an anterior open bite.Class II Division 2 associated with an increased anterior overbite.Question 16 of 20 17. With a flush terminal plane, permanent first molars will erupt in:Initially Class III relationErupt immediately into an end on relationInitially Class II relationWill assume a normal relationship immediatelyQuestion 17 of 20 18. When comparing stainless steel versus nickel titanium in orthodontic wires, stainless steel has a __________ modulus of elasticity. and __________ resilience.higher, higherlower, lowerlower, higherhigher, lowerQuestion 18 of 20 19. In patients with nickel allergy, which of the following types of orthodontic brackets can be usedTitaniumCompositeCeramicPolycarbonateQuestion 19 of 20 20. In an infant, the gum pad is separated from palate by:Dental grooveLateral sulcusTransverse grooveGingival grooveQuestion 20 of 20 Loading...
