MDS PREP
Uniform loading of periodontal ligament occurs in which of the following tooth movements
1) Tipping
2) Translation
3) Intrusion
4) Extrusion
Orthodontics
Answer: 2
Which of the following components of the fixed appliance holds the arch wire on the teeth except for that of anchor molars
1) Cleats
2) Brackets
3) Bands
4) Lock springs
Orthodontics
Answer: 2
Severe sleletal class II div I is characterised by
1) ANB is +8 degrees
2) ANB -5 degrees
3) ANB +2 degrees
4) FMPA is above 135 degrees
Orthodontics
Answer: 1
Normal facial index is
1) 65-75 %
2) 75-80 %
3) 80-90 %
4) 100 %
Orthodontics
Answer: 3
A child at 7.5 years of age receives extended course of tetracyline. Clinical crowns of which following teeth are likely to show discolouration
1) All permanent teeth will be discoloured
2) No teeth will be discoloured to an aesthetically objecionable degree
3) Only incisors and first molars affected
4) Only premolars and affected
Orthodontics
Answer: 2
In thumb-sucking habit, posterior crossbite occurs due to
1) Loss of normal outward thrust of the tongue
2) Negative pressure within the oral cavity, which causes buccinator to force the maxillary molar palatally
3) Both A and B
4) Loss of oral seal
Orthodontics
Answer: 3
The growth of the alveolar process has a major effect on
1) Anteroposterior jaw relationship
2) Vertical jaw relationship
3) Both
4) None of the above
Orthodontics Answer: 3