With what aspect of orthodontics is the orthodontist most commonly concerned 1) Preventive 2) Interceptive 3) Corrective 4) Surgical
OrthodonticsAnswer: 3
Placing the beaks into the furcation of primary second molar during extraction in 6-year-old child is contraindicated because 1) Proximity of succedaneous tooth buds 2) Of possibility of fracture of crowns 3) Of possibility of fracture of facial plates 4) Of possibility of fracture of lingual plates
OrthodonticsAnswer: 1
Which of the following factors may contribute to the severity of the incisor overbite in class II malocclusion? 1) Lip activity 2) Overclosure 3) The degree of lower crowding 4) The AP dental base relationship
OrthodonticsAnswer: 4
Lag phase of tooth movement is due to time taken for 1) Formation of new bone 2) Resorption of bone 3) Removal of hyalinised tissue 4) Gingival fibres to adjust
OrthodonticsAnswer: 3
Facial plane angle is between 1) FHP and N-Pog line 2) FHP and Mandibular plane angle 3) FHP and Sella Gonion line 4) Basion-Nasion and N-pog line
OrthodonticsAnswer: 1
How long should a palatal crib be worn by a patient being treated for thumb-sucking habit 1) One week 2) One month 3) Three months 4) Six months or longer
OrthodonticsAnswer: 4
Heavy forces on periodontal ligament causes 1) Hyalinization 2) Osteoclastic activity around tooth 3) Osteoblastic activity around tooth 4) Crest bone resorption
OrthodonticsAnswer: 1
First evidence of calcification of 3rd molars 1. 1.5 years 2. 4 years 3. 7 years 4. 10 years
