1. Which of the following wires can't be soldered and welded?Beta titaniumOptiflex wireStainless steelGold wireQuestion 1 of 20 2. Best method to retain a corrected maxillary canine rotation:Permanent retentionSupracrestal fibrotomyLong term removable retainerOvercorrectionQuestion 2 of 20 3. Maxillary skeletal arch expansionincreases overbite.decreases arch space.is easiest in the preadolescent patient.requires surgery in skeletally immature patients.Question 3 of 20 4. Andrew's 5th key of occlusion isRotation absentCurve of speeTight contactsBolton's rationQuestion 4 of 20 5. With flush-terminal plane, permanent first molars will erupt:Initially in class II relationshipInitially end-to-end relationshipInitially in class III relationshipInitially in class I relationshipQuestion 5 of 20 6. W arch is used for treatment of:Anterior cross bitePosterior cross biteOpen biteDeep biteQuestion 6 of 20 7. Which of the following teeth has maximum sensory innervations:Maxillary canineMaxillary central incisorsMandibular 1st molarMaxillary lateral incisorQuestion 7 of 20 8. The most significant factor in determining the prognosis of anterior crossbite correction is thedepth of the overbite.shape of the tooth involved.age of patient.space available mesiodistally.Question 8 of 20 9. Which of the following is the normal relationship of the primary molars in the deciduous dentition?Mesial stepNone of the aboveDistal stepFlush-terminal-planeQuestion 9 of 20 10. Two millimeters of maxillary incisor spacing in a 3 year old is indicative of amaxillary Bolton deficiency.persistent tongue thrusting.normal pattern of development.tooth size-arch size discrepancy.Question 10 of 20 11. Which of the following bone is used for estimation of growth in an individual:Frontal boneClavicleCapitateCervical vertebraQuestion 11 of 20 12. Secondary or Intermediate alveolar bone grafting for a cleft palate patient is done:Before canine eruptionBefore maxillary lateral incisor eruptionAfter first molar eruptionAfter canine eruptionQuestion 12 of 20 13. Moyers D type CLASS II malocclusion isOrthognathic Maxilla / Retrognathic MandibleOrthognathic Maxilla / Orthognathic MandiblePrognathic Maxilla / Retrognathic MandibleRetrognathic Maxilla / Retrognathic MandibleQuestion 13 of 20 14. Retrusion and protrusion of the mandible cannot be measured by which radiographic cephalometric variable?Facial axisANBFacial angleN-Pog perpendicularQuestion 14 of 20 15. Maximum friction is seen in which orthodontic wire:AJ WilcockStainless steelNiTi?-titaniumQuestion 15 of 20 16. What is seen when a wire is bent below its elastic limit and is released:Yield strengthDecrease in stiffnessIncrease in stiffnessSpring backQuestion 16 of 20 17. In apical root fracture of tooth, the orthodontic force should not be applied until9 months6 months3 months12 monthsQuestion 17 of 20 18. Teeth with root fracture cannot be moved orthodontically for:1 month3 months1 year6 monthsQuestion 18 of 20 19. A single tooth anterior crossbite found in a 9 year old shouldhave 2 arch orthodontic treatment.be treated with a removable appliance.be treated in the complete permanent dentition.self-correct.Question 19 of 20 20. Australian wire, which is round austenitic wire most commonly used with Begg differential light force technique, is manufactured byCold treated and heat drawnHeat treated and cold drawnSpring drawn and cold treatedAnnealed and cold drawnQuestion 20 of 20 Loading...