1. Which of the following is usually used as an etching agent before direct bonding of orthodontic brackets?10-15% unbuffered phosphoric acid75-85% unbuffered phosphoric acid35-50% unbuffered phosphoric acid100% unbuffered phosphoric acidQuestion 1 of 20 2. Frankfurt Horizontal plane is widely used in cephalometry. It is called so becauseNamed after the birth place of the scientist who discovered it.Named after Frankfurt University where significant research was doneAdopted at conference in Frankfurt, GermanyIt was discovered by a famous anthropologist WH FrankfurtQuestion 2 of 20 3. Collumn angle is increased inClass II Div 1Class IClass IIIClass II Div 2Question 3 of 20 4. For which of the following malocclusions is serial extraction most appropriate?Angle Class II.Angle Class I.All of theseAngle Class III.Question 4 of 20 5. In the mixed dentition, an end-to-end first permanent molar relationship is indicative ofnormally developing occlusion.Angle Class III malocclusion.ideal molar occlusion.Angle Class II malocclusion.Question 5 of 20 6. According to American Board of Orthodontics recommendation for colour coding of sequential tracing, end treatment ceph tracing is done in:GreenBlackBlueRedQuestion 6 of 20 7. Incisal liability in the maxillary and mandibular arch is:5 mm maxilla, 7 mm mandible7 mm maxilla, 5 mm mandible6 mm maxilla, 4 mm mandible4 mm maxilla, 6 mm mandibleQuestion 7 of 20 8. The lowest incidence of cleft palate is seen in which of the following:NegroesMongloidAfghansIndiansQuestion 8 of 20 9. Model diagnostic setup for planning clear aligners in 1945 was given by:AngleTweedKeslingRicketsQuestion 9 of 20 10. The two main conditions complicating the correction of a single tooth anterior crossbite area decreased overbite and a large labial frenum.lack of spacing and decreased overbite.lack of spacing and increased overbite.an increased overbite and a large labial frenumQuestion 10 of 20 11. Loss of tooth length of Premolar in case of orthodontic treatment?1.5 mm1.0 mm2.0 mm2.5 mmQuestion 11 of 20 12. Reciprocal anchorage mostly seen in:Intermaxillary elasticsCatalan's applianceMonoblocMaxillary expansion applianceQuestion 12 of 20 13. Premature loss of a primary maxillary second molar usually produces a malocclusion in the permanent dentition that is characterized bylabially displaced maxillary canines.an Angle Class III molar relationship on the affected side.delayed eruption of the permanent first molar.an Angle Class II molar relationship on the affected side.Question 13 of 20 14. Treatment of the ectopic eruption of a permanent maxillary first molar consists of:A brass wire placed between the primary second molar and permanent first molarExtraction of the primary second molarDisking the distal of the primary first molarAn appliance incorporating a finger spring to move the primary second molar mesiallyQuestion 14 of 20 15. Cleft lip and palate usually result fromfailure of development of both the lateral nasal and maxillary processes.failure of proper union of the median and lateral nasal processes.anhidrotic ectodermal dysplasia.failure of the union of the median nasal process with the lateral nasal and maxillary processes.Question 15 of 20 16. Rate of activation with slow expansion is1 mm per week1 mm per day1 mm for a month1 mm for 3 daysQuestion 16 of 20 17. A 6 year old patient has a larger than average diastema between the maxillary central incisors. The radiographic examination shows a mesiodens. In order to manage the diastema, you should extract the mesiodensonce the patient has reached the age of 12.only if it develops into a cystic lesionafter its complete eruption.as soon as possible.Question 17 of 20 18. All of the following assumptions are considered true when doing space analysis for calculating space discrepancy except:All permanent teeth will develop normallyCorrelation in size of mandibular incisors and succedaneous teethArch dimensions remain stablePrediction tables are most valid for all populationsQuestion 18 of 20 19. Adam's clasp adjustment is done by:Giving a v-shaped indent on the bridge of the claspCompressing the vertical loops of the arrow heads towards each otherBending the clasp gingivally at the point at which it inserts into the plateBending the bridge gingivallyQuestion 19 of 20 20. Ugly duckling stage coincides with transitional phaseAll of the above1st transitional phase2nd transitionalInter transitionalQuestion 20 of 20 Loading...
