1. Which of the following are potentially detrimental conditions that can occur during use of orthodontic appliances?Make proper oral hygiene difficult to performCause irritation to the gingivaAll of the aboveAct as plaque harborsQuestion 1 of 20 2. Prior to direct bonding, __________ is used as an etching agent. Prior to placing bands, _______________is used as an etching agent.nothing; 35-50% unbuffered phosphoric acidnothing; 10-15% unbuffered phosphoric acid35-50% unbuffered phosphoric acid; nothing10-15% unbuffered phosphoric acid; nothingQuestion 2 of 20 3. Concept of lingual orthodontic appliance was introduced byJohnsonAtkinsonKurzMershonQuestion 3 of 20 4. Tooth loss that causes the patient to bite in an abnormal relation of maxilla to mandible, in order to obtain better function during mastication is termedConvenience biteDramatic biteSquashed biteTemporary biteQuestion 4 of 20 5. Light orthodontic forces produceCompression of blood vessel in 2 hours on the tension sideBrings up osteoclasts with 10 secondsCompression of blood vessel within 3-5 seconds on the pressure sideLight forces will not have any effectQuestion 5 of 20 6. There is a difference between girls and boys with respect to the age at which the growth velocity reaches its peak.Boys are six months ahead of girls.Girls are one year ahead of boys.Girls are two years ahead of boysGirls are six months ahead of boys.Question 6 of 20 7. 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 7 of 20 8. Which of the following model analysis would be useful in planning extractions tor a 14 year old boy with severe Class II division 1 malocclusionAshley Howe analysisBolton's analysisPeck & Peck analysisFonts analysisQuestion 8 of 20 9. Mandibular anterior crowding occurs in normal young adults as a result ofLate mandibular growthMaxillary tooth-size excessTraumaThird molarsQuestion 9 of 20 10. The permanent maxillary canine most commonly eruptsbefore the maxillary second permanent molar.after the maxillary second permanent molar.before the mandibular permanent canine.before the maxillary first premolar.Question 10 of 20 11. A clinical diagnostic indication of palatal impaction of maxillary permanent canines does NOT includemidline central diastema.lack of canine buccal bulges in a 10 year old patient.delayed exfoliation of primary canines.proclined and laterally flared permanent lateral incisors.Question 11 of 20 12. Malocclusion caused by thumb sucking:Concave profileConvex profileDeep biteNarrow mandible archQuestion 12 of 20 13. With flush-terminal plane, permanent first molars will erupt:Initially in class I relationshipInitially in class II relationshipInitially end-to-end relationshipInitially in class III relationshipQuestion 13 of 20 14. Maxillary skeletal arch expansionis easiest in the preadolescent patient.decreases arch space.requires surgery in skeletally immature patients.increases overbite.Question 14 of 20 15. Down syndrome patient showsProtruded mandibleBoth of the aboveMidface retrusionRetruded mandibleQuestion 15 of 20 16. Which orthodontic analysis uses the dimensions of the upper and lower anterior teeth to predict the dimensions of the posterior teeth:Moyers analysisCarey's analysisHixon and OldfatherBolton's analysisQuestion 16 of 20 17. An 8 year old patient with all primary molars still present exhibits a cusp-to-cusp relationship of permanent maxillary and mandibular first molars and good alignment of the lower incisors. The management of this patient should be toplace patient on appropriate recall schedule.use a cervical headgear to reposition maxillary molars.refer for orthodontic consultation.disk the distal surfaces of primary mandibular second molars.Question 17 of 20 18. Second molars that get locked under the distal cusps of first molars during eruption are bestDisimpacted with "disimpaction springs"Guided with distal shoe space maintainerAutogenously transplantedExtracted and third molars allowed to eruptQuestion 18 of 20 19. Miniscrew gets primary retention fromOwn lengthCompact bonePitchDesign of threadsQuestion 19 of 20 20. If the centre of rotation is present at the centre of bracket slot orthodontic movement that occurs isTorquingTranslationControlled tippingUncontrolled tippingQuestion 20 of 20 Loading...
