1. To prevent mesial drift of a permanent first molar, the ideal time to place a distal extension space maintainer is immediately after extraction of the primary second molar. as soon as the extraction site of the primary second molar has completely healed. as soon as the tooth erupts through the gingival tissue. after the permanent second molar has erupted. 2. Skeletal deep bite causes: Downward rotation of maxilla No rotation of mandible Upward rotation of maxilla Downward rotation of mandible 3. Baker’s anchorage is also known as Intraoral anchorage Intramaxillary anchorage Extraoral anchorage Intermaxillary anchorage 4. For planning treatment in a patient with facial asymmetry requiring orthognathic surgery, which of the following is required: CBCT Grummons analysis OPG Model analysis 5. A Child with a Unilateral crossbite on closure is most probably suffering from: Bilateral constriction of maxilla Unilateral constriction of maxilla with deviated closure into unilateral crossbite Bilateral constriction of maxilla with deviated closure into unilateral crossbite Unilateral constriction of maxilla 6. ADA number for orthodontic wire is 25 28 30 32 7. All of the following are a feature of Complex Tongue Thrust except? This tongue thrust is characterized by teeth together swallow. The anterior open bite can be diffused or absent. The occlusion of teeth may be poor. Contraction of the circumoral muscles during swallowing. 8. Which of these is rarely seen in primary dentition: Protrusive anterior maxillary teeth Crowding End-on molar relation Spacing 9. In an 8-year old, the optimum time for treatment of an anterior crossbite of dental origin is following completion of jaw growth. after the maxillary premolars erupt. as soon as possible. after the maxillary canines are in position. 10. Which of the following bone is used for estimation of growth in an individual: Frontal bone Cervical vertebra Capitate Clavicle 11. If the centre of rotation is present at the centre of bracket slot orthodontic movement that occurs is Torquing Uncontrolled tipping Controlled tipping Translation 12. The angle SNA can be used to evaluate the mandibular angle. overbite. maxillary protrusion. upper incisor inclination. 13. Safety valve mechanism is? Increase in the mandibular inter-canine width at 14 yrs The anteroposterior increment in the maxilla at 14 yrs Increase in the mandibular height at 12 yrs Increase in the maxillary inter-canine width at 12 yrs 14. Angle’s classification of occlusion is based on antero-posterior relationship of maxillary and mandibular first permanent molars. vertical relationships in the lower face. antero-posterior skeletal relationship of maxilla to mandible. a full complement of teeth. 15. All of the following assumptions are considered true when doing space analysis for calculating space discrepancy except: All permanent teeth will develop normally Correlation in size of mandibular incisors and succedaneous teeth Prediction tables are most valid for all populations Arch dimensions remain stable 16. Spheno-occipital synchondroses fuses by what age: 9 years 3 years 16 years 13 years 17. Thumb sucking in child leads to change in facial profile (dental and skeletal changes), if the child performs the habit at least for how much time: 2 hrs daily 6 hrs daily 4 hrs daily Not related to duration 18. Which of the following conditions is most appropriately treated upon diagnosis? End-to-end molar relationships. A maxillary midline diastema. Improper axial inclination. Posterior cross-bite with midline discrepancies. 19. Incisal liability in the maxillary and mandibular arch is: 6 mm maxilla, 4 mm mandible 5 mm maxilla, 7 mm mandible 7 mm maxilla, 5 mm mandible 4 mm maxilla, 6 mm mandible 20. If moment of couple moment of force MC/MF = 0, then what type of movement occurs: Bodily Translation Torque Tipping Loading … Question 1 of 20
