Which of the following is recommended for bilateral premature exfoliation of mandibular canines 1) Nancy appliance 2) Lingual arch 3) Band and loop 4) Distal shoe appliance
OrthodonticsAnswer: 2
A disadvantage of removable space maintainer 1) Difficulty in maintaining vertical height 2) Not aesthetic 3) Difficult to clean 4) May not be worn by patient
OrthodonticsAnswer: 4
Loops and helices are included in arch wires primarily to 1) Align crowded teeth 2) Increase force of wires 3) Increase the anchorage 4) Increase the activation range
OrthodonticsAnswer: 4
Progress of tooth movements after wearing an appliance may be described as 1) Rapid initially-delay-Slow finally 2) Slow initially-Delay-Rapid finally 3) Delay-Slow initially-Rapid finally 4) Delay-Rapid initially-Slow finally
OrthodonticsAnswer: 2
An anterior bite plane should be trimmed 1) 30 degrees inclined to occlusal plane 2) 60 degrees inclined to occlusal plane 3) To keep posterior teeth 2 mm apart 4) To keep posterior teeth 5 mm apart
OrthodonticsAnswer: 3
Bone grows by 1) Apposition 2) Interstitial growth 3) Osteoclastic activity 4) All of the above
OrthodonticsAnswer: 1
An impending anterior crossbite should be treated 1) As soon as it is noticed before teeth reach occlusion 2) After eruption of all permanent teeth and orthodontic correction 3) As soon as canines erupt 4) Only by fixed appliance
OrthodonticsAnswer: 1
Chronological age of a child is 1) Related to developmental status 2) Related closely to dental age 3) Related closely to skeletal age 4) Often independent of skeletal and dental age
