1. Branch of orthodontics concerned with management of teeth in mixed dentition period is called: Preventive orthodontics Interceptive orthodontics Corrective orthodontics Surgical orthodontics 2. Angle’s classification of occlusion is based on vertical relationships in the lower face. antero-posterior relationship of maxillary and mandibular first permanent molars. a full complement of teeth. antero-posterior skeletal relationship of maxilla to mandible. 3. How much overjet can be successfully managed using dentofacial orthopedics: 0-7 mm 14-18 mm 5-7 mm 10-14 mm 4. Hand wrist radiograph in orthodontics are used to accurately determine: Skeletal maturity Both A and B Dental age Chronological age 5. Teeth with root fracture cannot be moved orthodontically for: 6 months 3 months 1 month 1 year 6. Areas of isolated gingival recession are most frequently seen on teeth that are labially prominent in the arch. ankylosed. moderately mobile. nonvital. 7. The permanent maxillary canine most commonly erupts after the maxillary second permanent molar. before the maxillary first premolar. before the mandibular permanent canine. before the maxillary second permanent molar. 8. Which of the following bone is used for estimation of growth in an individual: Cervical vertebra Clavicle Frontal bone Capitate 9. Continuous heavy orthodontic forces cause: Resorption of cementum only Resorption of alveolar bone only Hyalinization of PDL Rapid tooth movement 10. For bite opening in orthodontics, which of the following is done: Mesialization of posterior teeth Extrusion of anterior and intrusion of posterior teeth Intrusion of anterior and extrusion of posterior teeth Retraction of anterior teeth 11. The cranial vault is made up of a number of flat bones that are formed by _________________ , ________ cartilaginous precursors. Both endochondral and intramembranous bone formation; with Intramembranous bone formation; without Endochondral bone formation; with Both endochondral and intramembranous bone formation; without 12. 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 only if it develops into a cystic lesion as soon as possible. once the patient has reached the age of 12. after its complete eruption. 13. At age 9, a pt needs his tooth #30 extracted due to caries. What is the proper space maintenance treatment? removable partial denture no space maintenance is needed band and loop on “T” distal shoe on “T” 14. Adenoids lead to: Vertical descent of mandible Vertical ascent of maxilla Vertical ascent of mandible Vertical descent of maxilla 15. The highest critical surface tension is for which of the orthodontic brackets Titanium Ceramic alumina Polycarbonate Stainless steel 16. To standardize the magnification during recording of a lateral cephalogram for a child, the position of the sensor/film should be 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 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 17. To produce pure translatory motion in a tooth, what type of force is required Intermittent force Continuous force Interrupted force Moment of force 18. 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? Start expansion by removable appliance Send for radiographic analysis Wait for eruption of all teeth Refer to orthodontist 19. Which of the following are not classic symptoms of a sucking habit? a Class II malocclusion anterior open bite retroclination of the mandibular incisors expanded maxillary arch 20. Pitch of the hyrax screw is? 1.2 mm 0.8 mm 0.5 mm 0.25 mm Loading … Question 1 of 20
