1. Safety valve mechanism is? Increase in the maxillary inter-canine width at 12 yrs Increase in the mandibular inter-canine width at 14 yrs The anteroposterior increment in the maxilla at 14 yrs Increase in the mandibular height at 12 yrs 2. Cephalometrics is useful for assessing all of the following relationships except: Tooth to bone Soft palate to gingiva. Tooth to tooth Bone to bone 3. Continuous heavy orthodontic forces cause: Rapid tooth movement Resorption of alveolar bone only Resorption of cementum only Hyalinization of PDL 4. Bone remodeling theory of craniofacial growth was given by Van der claw Melvin and Sicher John hunter Brash 5. All of the following assumptions are considered true when doing space analysis for calculating space discrepancy except: All permanent teeth will develop normally Correlation in size of mandibular incisors and succedaneous teeth Arch dimensions remain stable Prediction tables are most valid for all populations 6. Overbite is defined as: Distobuccal cusp of maxillary 1st molar occludes with the central fossa of mandibular 1st molar The horizontal overlap of the maxillary and mandibular anterior teeth The horizontal overlap of mandibular over maxillary anterior teeth The vertical overlap of maxillary anterior over mandibular anterior teeth 7. Hand wrist radiograph in orthodontics are used to accurately determine: Dental age Skeletal maturity Both A and B Chronological age 8. Baker’s anchorage is also known as Intraoral anchorage Extraoral anchorage Intramaxillary anchorage Intermaxillary anchorage 9. The cranial vault is made up of a number of flat bones that are formed by _________________ , ________ cartilaginous precursors. Intramembranous bone formation; without Endochondral bone formation; with Both endochondral and intramembranous bone formation; without Both endochondral and intramembranous bone formation; with 10. The most significant factor in determining the prognosis of anterior crossbite correction is the space available mesiodistally. depth of the overbite. shape of the tooth involved. age of patient. 11. Which of the following bone is used for estimation of growth in an individual: Frontal bone Clavicle Capitate Cervical vertebra 12. Collumn angle is increased in Class III Class I Class II Div 2 Class II Div 1 13. In Downs analysis, an increase in Y axis is suggestive of: Skeletal dysplasia Vertical growth pattern Horizontal growth pattern Average growth pattern 14. In a tooth with alveolar bone resorption what will be the change in center of resistance? It will shift apically It will move outside the tooth It will shift coronally No change 15. Eruption path of posterior maxillary permanent teeth is directed: Downward and mesial Downward and distal Downward and buccal Downward and labial 16. Minimum anchorage is defined as a case where: Anchorage unit occupies 2/3rd extraction space Fixed anchorage Anchorage unit occupies 1/3rd of extraction space No movement of anchorage unit 17. The predominant type of movement produced by a finger spring on a removable appliance is rotation. translation. torque. tipping. 18. In a mouth breather, tonicity of upper lip is Decreased Slightly affected Increased No change 19. Which of the following malocclusions is most appropriately corrected immediately upon diagnosis? Angle Class II division 2. Angle Class II division 1. Cross-bite with a lateral functional shift. Midline diastema. 20. Xi point is seen in which of the following analysis: Down Ricketts Steiner Sassouni analysis Loading … Question 1 of 20
