Which of the following appliances is not used for slow maxillary expansion 1) Jack screw 2) Coffin spring 3) Quad helix appliance 4) Hyrax appliance
OrthodonticsAnswer: 4
A foreign body in the anterior border of the ramus of mandible at 9 years compared to 6 years will 1. Deepen as new bone apposition occurs 2. Become free in soft tissue as resorption occurs 3. Remain at the same level 4. Result in formation of exostosis
OrthodonticsAnswer: 2
Orthodontic treatment of which of the following is easily retained 1) Diastema 2) Rotation 3) Expansion 4) Anterior crossbites
OrthodonticsAnswer: 4
Lip bumpers are used to move 1) Lower molars mesially 2) Lower molars distally 3) Upper incisors labially 4) Upper molars distally
OrthodonticsAnswer: 2
A helix is placed for 1) Activation 2) Increasing the flexibility and range 3) Esthetics 4) Retention
OrthodonticsAnswer: 2
The oral drive theory to explain thumb sucking habit was given by 1) Benjamin 2) Sears and Wise 3) Sigmund Freud 4) Scheldon
OrthodonticsAnswer: 2
If an anterior tooth is tipped lingually, all of the following are true except 1) Osteoblasts occur at lingual crest of alveolar bone 2) Osteoclasts occur at lingual crest of alveolar bone 3) Osteoblasts occur at facial crest of alveolar bone 4) None of the above
OrthodonticsAnswer: 1
In a patient with competent lips together at rest, the lip line is opposite the tips of the upper incisors. The lip line is then described as 1) Average 2) High 3) Incomplete 4) Low
