1. One of the greatest advantages of using extra-oral anchorage is that: It can be used for all types of malocclusion. It has a direct reciprocal action on the opposing arch. More force can be applied. It permits the posterior movement of teeth in one arch without adversely disturbing the opposite arch. 2. Angle’s classification of occlusion is based on antero-posterior skeletal relationship of maxilla to mandible. a full complement of teeth. antero-posterior relationship of maxillary and mandibular first permanent molars. vertical relationships in the lower face. 3. Premature loss of a primary maxillary second molar usually produces a malocclusion in the permanent dentition that is characterized by labially displaced maxillary canines. delayed eruption of the permanent first molar. an Angle Class II molar relationship on the affected side. an Angle Class III molar relationship on the affected side. 4. Safety valve mechanism is? The anteroposterior increment in the maxilla at 14 yrs Increase in the maxillary inter-canine width at 12 yrs Increase in the mandibular height at 12 yrs Increase in the mandibular inter-canine width at 14 yrs 5. In a mouth breather, tonicity of upper lip is Slightly affected Increased Decreased No change 6. A 7 year old child has a badly carious deciduous mandibular first molar that needs removal. What space maintainer will you advise? Band and loop Nance button Distal shoe Transpalatal arch 7. Ulnar sesamoid bone calcification starts in Puberty Birth 3 months after birth Prepubertal growth spurt 8. With a flush terminal plane, permanent first molars will erupt in: Will assume a normal relationship immediately Initially Class II relation Erupt immediately into an end on relation Initially Class III relation 9. Spheno-occipital synchondroses fuses by what age: 9 years 3 years 13 years 16 years 10. 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 11. ADA number for orthodontic wire is 30 32 25 28 12. Inability to produce bilabial sounds properly like /b/ and /p/ along with lisp like sounds is seen in which malocclusion: Class III with competent lips Class I type 3 Class II division 1 with incompetent lips Class I type 4 13. 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. 14. Apertognathia means: Open bite Reversed overjet Deep bite Increased overjet 15. Ratio of Upper Anterior Facial Height to Lower Anterior Facial Height Is 55;45 60;40 0;60 45;55 16. Normal facial index is: <75% 75-80% >80% 1 17. With flush-terminal plane, permanent first molars will erupt: Initially in class II relationship Initially in class III relationship Initially end-to-end relationship Initially in class I relationship 18. Appearance of ulnar sesamoid bones in hand occurs: At the prepubertal spurt Birth At onset of pubertal growth spurt At the end of pubertal spurt 19. In Steiner’s analysis, SNA is 82 degrees. This indicates: Maxillary protrusion Mandibular protrusion Normal maxillary base Maxillary retrusion 20. Moyers D type CLASS II malocclusion is Prognathic Maxilla / Retrognathic Mandible Orthognathic Maxilla / Retrognathic Mandible Retrognathic Maxilla / Retrognathic Mandible Orthognathic Maxilla / Orthognathic Mandible Loading … Question 1 of 20
