1. In an 8-year old, the optimum time for treatment of an anterior crossbite of dental origin is following completion of jaw growth. after the maxillary canines are in position. after the maxillary premolars erupt. as soon as possible. 2. Normal facial index is: <75% 75-80% >80% 1 3. Stationary anchorage in orthodontics means: Equal and opposite movement in anchor unit The abutment tooth is free to tilt Use of opposite arch for anchorage Abutment is not free to tilt 4. Angle’s classification of occlusion is based on antero-posterior skeletal relationship of maxilla to mandible. antero-posterior relationship of maxillary and mandibular first permanent molars. a full complement of teeth. vertical relationships in the lower face. 5. Which of the following model analysis would be useful in planning extractions tor a 14 year old boy with severe Class II division 1 malocclusion Peck & Peck analysis Fonts analysis Bolton’s analysis Ashley Howe analysis 6. In a case with Class II malocclusion in a growing child, why is deep bite corrected before overjet: To aid in bonding brackets to lower anterior teeth To remove mechanical obstruction in normal mandibular anterior shift To reduce palatal trauma due to traumatic deep bite To achieve faster tooth movement 7. In true deep bite freeway space is Decreased Completely Obliterated Increased Remains Same 8. The highest critical surface tension is for which of the orthodontic brackets Polycarbonate Stainless steel Titanium Ceramic alumina 9. Branch of orthodontics concerned with management of teeth in mixed dentition period is called: Corrective orthodontics Preventive orthodontics Interceptive orthodontics Surgical orthodontics 10. 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? Send for radiographic analysis Wait for eruption of all teeth Start expansion by removable appliance Refer to orthodontist 11. Overbite is defined as: The horizontal overlap of mandibular over maxillary anterior teeth The horizontal overlap of the maxillary and mandibular anterior teeth Distobuccal cusp of maxillary 1st molar occludes with the central fossa of mandibular 1st molar The vertical overlap of maxillary anterior over mandibular anterior teeth 12. The point which can be altered by orthodontic tooth movement: ANS Gonion Point A Nasion 13. A Child with a Unilateral crossbite on closure is most probably suffering from: Bilateral constriction of maxilla with deviated closure into unilateral crossbite Unilateral constriction of maxilla Unilateral constriction of maxilla with deviated closure into unilateral crossbite Bilateral constriction of maxilla 14. A 6 year old patient has a larger than average diastema between the maxillary central incisors. The radiographic examination shows a mesiodens. In order to manage the diastema, you should extract the mesiodens after its complete eruption. only if it develops into a cystic lesion as soon as possible. once the patient has reached the age of 12. 15. A single tooth anterior crossbite found in a 9 year old should have 2 arch orthodontic treatment. be treated with a removable appliance. be treated in the complete permanent dentition. self-correct. 16. 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: Not related to duration 2 hrs daily 6 hrs daily 4 hrs daily 17. Ideal orthodontic tooth movement involves frontal resorption. large forces. subcrestal incisions. undermining resorption. 18. Pericision is used for retention of corrected: Intrusion Extrusion Impaction Rotation 19. Transverse cant of occlusal plane is seen in frontal plane examination. It occurs due to: Alteration and abstraction of jaw Change in yaw of dentition Alteration in pitch of dentition Alteration in roll of dentition 20. The most appropriate time for surgical treatment of a patient with mandibular prognathism is just before eruption of the second permanent molars. following the completion of growth. just after eruption of the second permanent molars. just after the end of the prepubertal growth spurt. Loading … Question 1 of 20
