1. Retrusion and protrusion of the mandible cannot be measured by which radiographic cephalometric variable? Facial axis Facial angle N-Pog perpendicular ANB 2. According to the NORMS of the orthodontic study models, the total height of maxillary n mandibular model should be close to? 60 mm 90 mm 70 mm 55 mm 3. When force is applied through center of resistance of tooth which of the following occurs: Torquing Rotation Translation Tipping 4. 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. 5. Facial profile of a child with a habit of thumb sucking: Concave and short face Convex and short face Concave and long face Convex and long face 6. Which of the following is false concerning a mixed dentition analysis? the analysis is based on a correlation of tooth size analysis is done for each quadrant it is used to predict the amount of crowding after the permanent teeth erupt it is performed during the mixed dentition 7. There is a difference between girls and boys with respect to the age at which the growth velocity reaches its peak. Boys are six months ahead of girls. Girls are six months ahead of boys. Girls are one year ahead of boys. Girls are two years ahead of boys 8. ADA number for orthodontic wire is 30 32 28 25 9. 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: 4 hrs daily 6 hrs daily Not related to duration 2 hrs daily 10. Minimum anchorage is defined as a case where: No movement of anchorage unit Anchorage unit occupies 1/3rd of extraction space Anchorage unit occupies 2/3rd extraction space Fixed anchorage 11. To standardize the magnification during recording of a lateral cephalogram for a child, the position of the sensor/film should be Distance between sensor and source should be 60 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 the sensor and source of radiation should be kept at 70 inches 12. When a simple tipping force is applied to the crown of a single-rooted tooth, the centre of rotation is located within the apical half of the root. at the apex. within the cervical one third of the root. at the cervical line. 13. The best space maintainer to prevent the lingual collapse that often occurs following the early loss of a mandibular primary canine is a band and loop space maintainer. distal shoe space maintainer. lingual arch. Nance expansion arch. 14. Hyper active mentalis activity is seen in Class I malocclusion Class II div 1 malocclusion Class III malocclusion Class II div 2 malocclusion 15. The highest critical surface tension is for which of the orthodontic brackets Stainless steel Titanium Ceramic alumina Polycarbonate 16. On Ricketts esthetic plane, the lower lip Is 1 mm posterior to the plane Rests on the plane Is I mm anterior to the plane Is 2 mm posterior to the plane 17. Maximum Lip thickness is seen at what age in males: 10 years 21 years 18 years 16 years 18. Model diagnostic setup for planning clear aligners in 1945 was given by: Rickets Tweed Angle Kesling 19. The angle SNA can be used to evaluate the maxillary protrusion. overbite. upper incisor inclination. mandibular angle. 20. Exclusive of third molars, the permanent dentition is usually completely erupted by the age of 18 to 21 years. 12 to 14 years. 15 to 17 years. 9 to 11 years. Loading … Question 1 of 20
