1. The best space maintainer to prevent the lingual collapse that often occurs following the early loss of a mandibular primary canine is a Nance expansion arch. lingual arch. band and loop space maintainer. distal shoe space maintainer. 2. Eruption path of posterior maxillary permanent teeth is directed: Downward and buccal Downward and mesial Downward and distal Downward and labial 3. Which of the following is false concerning a mixed dentition analysis? it is performed during the mixed dentition it is used to predict the amount of crowding after the permanent teeth erupt analysis is done for each quadrant the analysis is based on a correlation of tooth size 4. Prior to the correction of a one tooth anterior crossbite, the principle factor to consider is the sequence of eruption of the permanent dentition. adequacy of mesio-distal space. developmental age of the patient. morphology of the anterior teeth. 5. 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 Refer to orthodontist Send for radiographic analysis Start expansion by removable appliance 6. Ratio of Upper Anterior Facial Height to Lower Anterior Facial Height Is 60;40 55;45 0;60 45;55 7. Baker’s anchorage is also known as Intraoral anchorage Extraoral anchorage Intermaxillary anchorage Intramaxillary anchorage 8. Moyers D type CLASS II malocclusion is Orthognathic Maxilla / Orthognathic Mandible Prognathic Maxilla / Retrognathic Mandible Retrognathic Maxilla / Retrognathic Mandible Orthognathic Maxilla / Retrognathic Mandible 9. According to the NORMS of the orthodontic study models, the total height of maxillary n mandibular model should be close to? 90 mm 55 mm 60 mm 70 mm 10. Appearance of ulnar sesamoid bones in hand occurs: At the end of pubertal spurt At onset of pubertal growth spurt Birth At the prepubertal spurt 11. If the centre of rotation is present at the centre of bracket slot orthodontic movement that occurs is Translation Uncontrolled tipping Torquing Controlled tipping 12. Ulnar sesamoid bone calcification starts in 3 months after birth Puberty Birth Prepubertal growth spurt 13. The highest critical surface tension is for which of the orthodontic brackets Polycarbonate Ceramic alumina Stainless steel Titanium 14. The most likely reason for extracting four first premolars in orthodontics is because of retrusive maxillary incisors. posterior crossbite. an excessive overbite. a tooth size/arch size discrepancy. 15. One of the greatest advantages of using extra-oral anchorage is that: It permits the posterior movement of teeth in one arch without adversely disturbing the opposite arch. It can be used for all types of malocclusion. It has a direct reciprocal action on the opposing arch. More force can be applied. 16. During active tooth movement, hyalinization is seen during: Initial phase All three stages Lag phase Post-lag phase 17. In an Angle Class I occlusion, which cusp of which permanent tooth moves between the mesiolingual and distolingual cusps of the mandibular second molar in a working side movement? Mesiolingual cusp of the maxillary second molar. Mesiolingual cusp of the maxillary first molar. Distolingual cusp of the maxillary second molar. Distolingual cusp of the maxillary first molar. 18. Maxillary arch increases in length by: Growth at the sphenozygomatic suture Development of Palate Deposition of bone at Tuberosity Development of alveolar process 19. In long face individuals, who have excessive lower anterior facial height, the palatal plane is rotated Up posteriorly No rotation of the palatal plane Down posteriorly Down anteriorly 20. The most appropriate opportunity for orthodontic treatment involving growth manipulation is during the period of greatest growth velocity. after the eruption of third molars. during the late primary dentition. after skeletal growth is complete. Loading … Question 1 of 20
