When a permanent tooth emerges clinically how much of root structure is most likely to have developed 1) 1/3 2) 2/3 3) 100 % 4) No reaction at all
OrthodonticsAnswer: 2
Which of the following is passive tissue borne appliance 1) Frankel 2) Activator 3) Herbst 4) Bionator
OrthodonticsAnswer: 1
Contraindications of activator are all except 1) High FMA angle 2) Severe protruded maxilla 3) Growing patient 4) Severe crowding
OrthodonticsAnswer: 3
An ANB angle 2 degree on the cephalogram usually indicates 1) An unfavourable relationship of mandible to maxilla 2) A favourable relationship of maxillary alveolar base to mandibular alveolar base 3) Poor cranial growth with poor prognosis 4) Retruded maxillary incisor
OrthodonticsAnswer: 2
Superimposition in cephalometric studies is done from registration point. This best demonstrates 1) Growth of structures farthest from point 2) Growth of structures nearest to point 3) Growth at that point 4) All of the above
OrthodonticsAnswer: 1
Undesirable side effect associated with a buccal spring to regain space for mandibular second premolar 1) Rotation of first premolar 2) Intrusion of first molar 3) Mobility of tooth 4) Gingival irritability
OrthodonticsAnswer: 1
Anchorage in a removable appliance is provided by 1) Labial bow 2) Finger springs 3) Clasps 4) Acrylic plates
OrthodonticsAnswer: 4
The body tissue that grows rapidly but shows minimal growth after the age of 6-7 years is 1. Neural tissue 2. Lymphoid tissue 3. Skeletal tissue 4. Genital tissue
