1. Most common relationship of the primary molars in deciduous dentition: Distal step Flush terminal plane Mesial step Angle Class I 2. Not true about couple of forces acting on a tooth: Forces are oriented parallel to each other Pure rotation can be achieved Usually forces are equal in magnitude Collinear forces acting in same direction 3. Areas of isolated gingival recession are most frequently seen on teeth that are moderately mobile. labially prominent in the arch. ankylosed. nonvital. 4. Which cephalometric angle does not change with treatment Saddle angle SNA ANB SNB 5. A single tooth anterior crossbite found in a 9 year old should be treated with a removable appliance. have 2 arch orthodontic treatment. be treated in the complete permanent dentition. self-correct. 6. Continuous heavy orthodontic forces cause: Resorption of alveolar bone only Resorption of cementum only Hyalinization of PDL Rapid tooth movement 7. The importance of proximal caries in deciduous 1st Molar for an orthodontist is: Flush terminal plane malocclusion Loss of arch length RedUcticin in, arch length due to growth of mandible Class I Occlusion 8. Which of the following Class II Division 1 malocclusion(s) is/are most likely to be corrected with a cervical headgear? Open bite, prognathic maxilla, prognathic mandible. Retrognathic mandible, retrognathic maxilla, open bite. Prognathic maxilla, decreased lower face height, increased over bite. Increased lower anterior face height, prognathic mandible, retrognathic maxilla. 9. Malocclusion caused by thumb sucking: Deep bite Concave profile Convex profile Narrow mandible arch 10. Seventh key of normal occlusion: Crown angulation and inclination Bolton ratio Palatal plane Molar relation 11. A 3 year old child suffered traumatic lateral luxation injury to his upper central incisor. The tooth is not mobile and does not interfere in occlusion. What should be done Wait and watch Reduce both the affected and the opposite tooth Reduce the affected tooth Reposition the tooth and splint 12. Progressive malocclusion is: Class III Class II A+C Class I 13. All of the following are types of tooth movement EXCEPT one. Which one is the EXCEPTION? pulling Tipping translation extrusion 14. Facial index of 85.6% means: Euryprosopic face Hypereuryprosopic face Mesoprosopic face Leptoprosopic face 15. There is a difference between girls and boys with respect to the age at which the growth velocity reaches its peak. Girls are six months ahead of boys. Girls are one year ahead of boys. Girls are two years ahead of boys Boys are six months ahead of girls. 16. Dontrix gauze is used to: Measure wire deformation Measure strength of wire Measure wire distortion Measure force 17. Skeletal classification of malocclusion was first given by: Moyers Salzman Kratz Angle 18. Which of the following is an antero-posterior curve? Curve of monsoon Curve of spee Curve of Wilson Bonwill curve 19. The permanent maxillary canine most commonly erupts before the maxillary first premolar. before the mandibular permanent canine. before the maxillary second permanent molar. after the maxillary second permanent molar. 20. The predominant type of movement produced by a finger spring on a removable appliance is tipping. rotation. translation. torque. Loading … Question 1 of 20
