1. Which type of malocclusion should be corrected as early as possible? Cross-bite associated with a functional shift of the mandible from initial contact to maximum intercuspation. Class II Division 2 associated with an increased anterior overbite. Class II Division 1 associated with an anterior open bite. Anterior open bite associated with a lip or digit sucking habit. 2. Safety valve mechanism is? Increase in the mandibular inter-canine width at 14 yrs Increase in the maxillary inter-canine width at 12 yrs Increase in the mandibular height at 12 yrs The anteroposterior increment in the maxilla at 14 yrs 3. Bone remodeling theory of craniofacial growth was given by Melvin and Sicher Van der claw John hunter Brash 4. The angle SNA can be used to evaluate the upper incisor inclination. maxillary protrusion. mandibular angle. overbite. 5. Plane of reference used in transverse direction in WITS analysis: Sella-nasion plane Frankfurt horizontal plane Palatal plane Functional occlusal plane 6. an Angle Class I occlusion, the mesiobuccal cusp of the maxillary first molar occludes with mesial marginal ridge of the mandibular first molar. mesiobuccal groove of the mandibular first molar. central fossa of the mandibular first molar. mesiobuccal cusp of the mandibular first molar. 7. Xi point is seen in which of the following analysis: Steiner Down Ricketts Sassouni analysis 8. How much overjet can be successfully managed using dentofacial orthopedics: 5-7 mm 14-18 mm 10-14 mm 0-7 mm 9. Couple in orthodontics means: 2 unequal forces acting on the same object opposite in direction Single force acting on the same object Single force acting on 2 objects at the same time 2 forces equal and opposite in direction acting on the same object 10. In a case with Class II malocclusion in a growing child, why is deep bite corrected before overjet: To reduce palatal trauma due to traumatic deep bite To remove mechanical obstruction in normal mandibular anterior shift To achieve faster tooth movement To aid in bonding brackets to lower anterior teeth 11. Alveolar bone is undergoing remodelling until the complete eruption of permanent teeth. through the primary dentition. until the end of mixed dentition. throughout life. 12. Seventh key of normal occlusion: Palatal plane Crown angulation and inclination Bolton ratio Molar relation 13. Everted prominent lips with small mandible indicates: Upper decreased facial height Upper increased facial height Lower decreased facial height Lower increased facial height 14. An Angle Class II, division 1 malocclusion can be differentiated from an Angle Class II, division 2 malocclusion based upon the amount of overbite. severity of the Angle Class II malocclusion. molar relationship. inclination of maxillary incisors. 15. The two main conditions complicating the correction of a single tooth anterior crossbite are lack of spacing and decreased overbite. an increased overbite and a large labial frenum lack of spacing and increased overbite. a decreased overbite and a large labial frenum. 16. Apertognathia means: Reversed overjet Increased overjet Deep bite Open bite 17. Progressive malocclusion is: A+C Class III Class I Class II 18. What is the most reliable indicator with respect to the timing of treatment for growth modification? Chronologic age. Skeletal age. Dental age. Tanner weight chart 19. The permanent maxillary canine most commonly erupts after the maxillary second permanent molar. before the maxillary second permanent molar. before the mandibular permanent canine. before the maxillary first premolar. 20. A 9 year old child with developing facial asymmetry and maxillary constriction and unilateral posterior cross bite comes to you for treatment. What will you do? Wait for eruption of all teeth Send for radiographic analysis Refer to orthodontist Start expansion by removable appliance Loading … Question 1 of 20
