Which of the following is passive tissue borne appliance 1) Frankel 2) Activator 3) Herbst 4) Bionator
OrthodonticsAnswer: 1
Class III relation malocclusion if found in 1) Mandibulofacial dystosis 2) Craniofacial dystosis 3) Achondroplasia 4) Down"s syndrome
OrthodonticsAnswer: 1
Premaxilla is derived from 1) Maxillary protuberance 2) Palatine bones 3) Frontonasal process 4) Medial process
OrthodonticsAnswer: 3
Which of the following permanent teeth is least extracted for orthodontic treatment? 1) Canines 2) Maxillary first permanent molar 3) 1st molar 4) 2nd molar
OrthodonticsAnswer: 1
Cusp-cusp relation in molar relation is self-corrected to class-I relation by 1) Only maxillary molars drifting backwards 2) By forward molar drifting of lower arch only 3) Both upper and lower molars drifting forwards 4) It is not self-corrective
OrthodonticsAnswer: 3
In Angle"s classification for malocclusion, key tooth is 1) MB cusp of permanent Max. Ist molar 2) DB cusp of permanent Max. Ist molar 3) MB cusp of permanent Max. 2nd molar 4) MB cusp of permanent Mand. Ist molar
Meckel"s cartilage 1) Gives origin to greater part of mandible 2) Contributes to origin of mandibular condyle only 3) Greater part of it disappears without contributing to the formation of mandible 4) None of the above
