Class III malocclusion is found in all of the following except 1) Cleft palate 2) Achondroplasia 3) Down"s syndrome 4) Pierre Robin syndrome
OrthodonticsAnswer: 4
Baker"s anchorage is a type of 1) Intramaxillary anchorage 2) Intermaxillary anchorage 3) Extraoral anchorage 4) Muscular anchorage
OrthodonticsAnswer: 2
A force directed through the center of resistance of a tooth will result in 1. bodily movement. 2. intrusion. 3. rotation. 4. tipping.
OrthodonticsAnswer: 1
Clinical examination of 15-years-old girl reveals permanent central incisors, permanent canines and primary canines anterior to premolar. The most probable cause 1) Thumb-sucking habit 2) Ankylosed primary canine 3) Arch length deficiency and premature exfoliation of permanent laterals 4) Congenitally missing permanent lateral incisor
OrthodonticsAnswer: 4
Eruption of teeth is delayed in all of the following except 1. Hypothyroidism and cleidocranial dysplasia 2. Acromegaly and hyperthyroidism 3. Rickets and cherubism 4. Cretinism and dentigerous cysts
OrthodonticsAnswer: 2
Main cause of relapse after orthodontic treatment is 1) Density of cortical bone 2) Persistence of tongue and finger habits 3) Persistence of oblique fibres 4) Persistence of free gingiva and transseptal fibres
OrthodonticsAnswer: 4
Child has a flush terminal plane early in mixed dentition. Movement of the lower molar forward relative to the upper molar by 1) 1 mm 2) 1.5 mm 3) 2 mm 4) 3.5 mm
OrthodonticsAnswer: 4
Which of the following are true of chin cap 1) It has to exert 2-3 pounds if worn for 10-12 hours 2) It has to exert 1-2 pounds if worn for 16-18 hours 3) It has to be worn for 24 hours/day to correct severe prognathic mandible 4) All of the above
