1. Ratio of Upper Anterior Facial Height to Lower Anterior Facial Height Is55;4560;4045;550;60Question 1 of 20 2. Maxillary arch increases in length by:Deposition of bone at TuberosityDevelopment of PalateDevelopment of alveolar processGrowth at the sphenozygomatic sutureQuestion 2 of 20 3. Ugly duckling stage coincides with transitional phase2nd transitionalInter transitionalAll of the above1st transitional phaseQuestion 3 of 20 4. Which one of the following is most common iatrogenic effect of acid etching on enamel?Fracture or cracking of enamel during debondingAll of the aboveRougher surface if overetchedLoss of enamel during etchingQuestion 4 of 20 5. According to the NORMS of the orthodontic study models, the total height of maxillary n mandibular model should be close to?60 mm90 mm70 mm55 mmQuestion 5 of 20 6. A tooth undergoing orthodontic tooth movement, the tension side will show:Overall narrowing of PDL space on both sidesNarrowed PDL spaceFuzziness of lamina duraWidened PDL spaceQuestion 6 of 20 7. Flutes present in microimplant helps in?Easy Insertion & Clear DebrisEasy removalPrimary StabilitySecondary StabilityQuestion 7 of 20 8. Which of the following materials is not used as antiflux?GraphiteCalcium carbonate in alcoholRougeBoric acidQuestion 8 of 20 9. Adams clasp is formed from which gauge of stainless steel wire23 mil28 mil22 mil24 milQuestion 9 of 20 10. Appearance of ulnar sesamoid bones in hand occurs:At onset of pubertal growth spurtBirthAt the end of pubertal spurtAt the prepubertal spurtQuestion 10 of 20 11. The most common cause of malocclusion with a Class I molar relationship iscrossbite in the posterior segments.tooth size and jaw size discrepancy.a thumbsucking habit.improper eruption of permanent first molars.Question 11 of 20 12. In patients with nickel allergy, which of the following types of orthodontic brackets can be usedCompositeCeramicTitaniumPolycarbonateQuestion 12 of 20 13. Disadvantage of the use of laminated and braided arch wires isDifficult to handle clinicallyAbruptness in response of adjustmentLack of stabilityFractureQuestion 13 of 20 14. Which of the following orthodontic wire cannot be soldered:Cobalt-chromiumNiTiStainless steel?-titaniumQuestion 14 of 20 15. For bite opening in orthodontics, which of the following is done:Retraction of anterior teethIntrusion of anterior and extrusion of posterior teethMesialization of posterior teethExtrusion of anterior and intrusion of posterior teethQuestion 15 of 20 16. Primate space in mandibular arch is present between:Canine and primary first molarCanine and premolarLateral incisor and canine1' and 2" primary molarsQuestion 16 of 20 17. Light orthodontic forces produceBrings up osteoclasts with 10 secondsCompression of blood vessel within 3-5 seconds on the pressure sideCompression of blood vessel in 2 hours on the tension sideLight forces will not have any effectQuestion 17 of 20 18. Gaining the original shape by the wire on heating to transitional temperature is calledAnnealingTemperingThermo elasticityStrain relievingQuestion 18 of 20 19. The rationale for retention in orthodontics (accomplished with fixed or removable retainers) is to:Allow for reorganization of the gingival and periodontal tissuesMaintain teeth in unstable conditionsMinimize changes due to growthAll of the aboveQuestion 19 of 20 20. A single tooth anterior crossbite found in a 9 year old shouldbe treated in the complete permanent dentition.have 2 arch orthodontic treatment.be treated with a removable appliance.self-correct.Question 20 of 20 Loading...
