1. Interceptive orthodontic treatment using appliances to treat the effects of oral habits should start at the same time as comprehensive orthodontic treatment. be delayed until the completion of growth occur during the early to middle mixed dentition. start in the primary dentition. 2. Prior to the correction of a one tooth anterior crossbite, the principle factor to consider is the adequacy of mesio-distal space. sequence of eruption of the permanent dentition. morphology of the anterior teeth. developmental age of the patient. 3. Moyers D type CLASS II malocclusion is Orthognathic Maxilla / Retrognathic Mandible Prognathic Maxilla / Retrognathic Mandible Orthognathic Maxilla / Orthognathic Mandible Retrognathic Maxilla / Retrognathic Mandible 4. Spheno-occipital synchondroses fuses by what age: 13 years 3 years 16 years 9 years 5. If the centre of rotation is at the apex of the root, then the orthodontic movement which results is: Uncontrolled tipping Translation Controlled tipping Torquing 6. According to the NORMS of the orthodontic study models, the total height of maxillary n mandibular model should be close to? 70 mm 60 mm 55 mm 90 mm 7. Retrusion and protrusion of the mandible cannot be measured by which radiographic cephalometric variable? N-Pog perpendicular Facial angle ANB Facial axis 8. In an 8-year old, the optimum time for treatment of an anterior crossbite of dental origin is after the maxillary premolars erupt. after the maxillary canines are in position. following completion of jaw growth. as soon as possible. 9. Transverse cant of occlusal plane is seen in frontal plane examination. It occurs due to: Alteration in pitch of dentition Change in yaw of dentition Alteration and abstraction of jaw Alteration in roll of dentition 10. On Ricketts esthetic plane, the lower lip Is 1 mm posterior to the plane Is I mm anterior to the plane Rests on the plane Is 2 mm posterior to the plane 11. 12 primary and 12 permanent teeth seen at what age in a child: 11.5 13.5 8.5 6.5 12. A tooth undergoing orthodontic tooth movement, the tension side will show: Fuzziness of lamina dura Overall narrowing of PDL space on both sides Narrowed PDL space Widened PDL space 13. In a mouth breather, tonicity of upper lip is Slightly affected Decreased No change Increased 14. Increased ANB angle signifies: Retrognathic mandible. Prognathic mandible Retrognathic maxilla Bimaxillary protrusion 15. Which orthodontic analysis uses the dimensions of the upper and lower anterior teeth to predict the dimensions of the posterior teeth: Bolton’s analysis Hixon and Oldfather Carey’s analysis Moyers analysis 16. The importance of proximal caries in deciduous 1st Molar for an orthodontist is: Loss of arch length Flush terminal plane malocclusion Class I Occlusion RedUcticin in, arch length due to growth of mandible 17. Inability to produce bilabial sounds properly like /b/ and /p/ along with lisp like sounds is seen in which malocclusion: Class I type 4 Class II division 1 with incompetent lips Class I type 3 Class III with competent lips 18. Best method to retain a corrected maxillary canine rotation: Supracrestal fibrotomy Long term removable retainer Permanent retention Overcorrection 19. With a flush terminal plane, permanent first molars will erupt in: Initially Class II relation Will assume a normal relationship immediately Erupt immediately into an end on relation Initially Class III relation 20. Class II malocclusion usually presents a _________________ facial profile: Complex Orthognathic Retrognathic Prognathic Loading … Question 1 of 20
