1. Safety valve mechanism for pubertal growth spurt is: Intercanine width in mandible in both males and females Intercanine width in maxilla in both males and females Intercanine width in maxilla in females only Intercanine width in maxilla in males only 2. Bone remodeling theory of craniofacial growth was given by Melvin and Sicher John hunter Van der claw Brash 3. What is needed so that soft tissues are clearly visible on a lateral cephalometric radiograph? A hard tissue shield A soft tissue shield Adjustment in milliamperage Adjustment in kilovoltage 4. Maximum Lip thickness is seen at what age in males: 10 years 21 years 16 years 18 years 5. Adenoids lead to: Vertical descent of maxilla Vertical ascent of mandible Vertical descent of mandible Vertical ascent of maxilla 6. Serial extraction is indicated in: Open bite malocclusion Class III malocclusion Class II malocclusion Class I malocclusion 7. COGS analysis was given by: Burstone and Legan Burstone and Levine Burstone and Nanda Burstone and Merill 8. Continuous heavy orthodontic forces cause: Resorption of alveolar bone only Hyalinization of PDL Resorption of cementum only Rapid tooth movement 9. For which of the following malocclusions is serial extraction most appropriate? All of these Angle Class I. Angle Class II. Angle Class III. 10. A tongue thrust is most often found in a child with an Angle Class II, division 2 malocclusion. a bimaxillary protrusion. a deep overbite. an anterior open-bite. 11. Stationary anchorage in orthodontics means: Abutment is not free to tilt The abutment tooth is free to tilt Use of opposite arch for anchorage Equal and opposite movement in anchor unit 12. Best time to modify growth is: Primary dentition Late mixed dentition Permanent dentition Early mixed dentition 13. When force is applied through center of resistance of tooth which of the following occurs: Tipping Rotation Torquing Translation 14. The most significant factor in determining the prognosis of anterior crossbite correction is the age of patient. depth of the overbite. space available mesiodistally. shape of the tooth involved. 15. Premature loss of a primary maxillary second molar usually produces a malocclusion in the permanent dentition that is characterized by an Angle Class III molar relationship on the affected side. an Angle Class II molar relationship on the affected side. delayed eruption of the permanent first molar. labially displaced maxillary canines. 16. To standardize the magnification during recording of a lateral cephalogram for a child, the position of the sensor/film should be Distance between the sensor and source of radiation should be kept at 70 inches Consider head radius as 6 inches and add to 60 inches between ilm and source of radiation Consider head radius as 9 inches and add to 60 inches between film and source of radiation Distance between sensor and source should be 60 inches 17. Frankfurt Horizontal plane is widely used in cephalometry. It is called so because It was discovered by a famous anthropologist WH Frankfurt Named after the birth place of the scientist who discovered it. Named after Frankfurt University where significant research was done Adopted at conference in Frankfurt, Germany 18. In an adult Class II division 1 malocclusion case, what should be done: Extraction of upper 1st PM Extraction of lower 2nd PM Extraction of lower 1st PM Extraction of upper 2nd PM 19. In the mixed dentition, an end-to-end first permanent molar relationship is indicative of normally developing occlusion. Angle Class III malocclusion. ideal molar occlusion. Angle Class II malocclusion. 20. Which of the following metals shows the property of twinning Cobalt chromium All of the above Nickel titanium alloy Stainless steel Loading … Question 1 of 20
