1. an Angle Class I occlusion, the mesiobuccal cusp of the maxillary first molar occludes withmesiobuccal groove of the mandibular first molar.mesial marginal ridge of the mandibular first molar.mesiobuccal cusp of the mandibular first molar.central fossa of the mandibular first molar.Question 1 of 20 2. Malocclusion is most often:HereditaryCaused by antibioticsCaused by bad habitsCaused by traumaQuestion 2 of 20 3. When force is applied through center of resistance of tooth which of the following occurs:TorquingTippingRotationTranslationQuestion 3 of 20 4. In child development, the embryo period is?0-2 weeks2-3 weeks9 weeks to birth2-8 weeksQuestion 4 of 20 5. Appropriate forces for orthodontic tooth movement areintermittent and heavy.continuous and light.continuous and heavy.intermittent and light.Question 5 of 20 6. Which of the following teeth has maximum sensory innervations:Maxillary central incisorsMaxillary canineMaxillary lateral incisorMandibular 1st molarQuestion 6 of 20 7. Inhibition of mandibular growth due to ankylosis of TMJ is known as:HypoplasiaVogel gesichtAplasiaHyperplasiaQuestion 7 of 20 8. When M: F is 0, tooth movement isControlled tipping typeUncontrolled tipping typeTorque typeBodily typeQuestion 8 of 20 9. In true deep bite freeway space isIncreasedDecreasedCompletely ObliteratedRemains SameQuestion 9 of 20 10. According to American Board of Orthodontics recommendation for colour coding of sequential tracing, end treatment ceph tracing is done in:BlackGreenRedBlueQuestion 10 of 20 11. Recurring tooth rotations occur most frequently after orthodontic correction due todensity of the cortical bone.persistence of tongue and finger habits.free gingival and transseptal fibres.oblique fibres of the periodontal ligament.Question 11 of 20 12. The ideal patient for rapid palatal expansion should have all characteristics exceptSome degree of dental as well as skeletal constriction initiallyTendency of openbiteFull cusp crossbite with a skeletal componentNo preexisting dental expansionQuestion 12 of 20 13. In a 17 year old male with a vertical growth pattern, deep anterior bite and crowding of dentition requires orthodontic treatment. In such a case, correction of deep bite while maintaining mandibular plane can be achieved by:Relative intrusion of anteriorsAbsolute intrusion of posteriorsRelative extrusion of posteriorsAbsolute intrusion of anteriorsQuestion 13 of 20 14. The lag phase of tooth movement usually lasts for?2-3 months2 - 3 weeks2-3 hours2 - 3 daysQuestion 14 of 20 15. The importance of proximal caries in deciduous 1st Molar for an orthodontist is:RedUcticin in, arch length due to growth of mandibleClass I OcclusionFlush terminal plane malocclusionLoss of arch lengthQuestion 15 of 20 16. The highest critical surface tension is for which of the orthodontic bracketsCeramic aluminaStainless steelTitaniumPolycarbonateQuestion 16 of 20 17. Force applied by Jack Screw during RME is:5-10 pounds10-20 pounds2-5 pounds25-30 poundsQuestion 17 of 20 18. What is the cause of relapse after derotation treatment?Apical fibersOblique fibersSupracrestal gingival fibersTransverse fibersQuestion 18 of 20 19. Maxillary skeletal arch expansiondecreases arch space.is easiest in the preadolescent patient.requires surgery in skeletally immature patients.increases overbite.Question 19 of 20 20. A 7 year old child has a badly carious deciduous mandibular first molar that needs removal. What space maintainer will you advise?Band and loopNance buttonTranspalatal archDistal shoeQuestion 20 of 20 Loading...