MDS PREP
Which position is the most important in diagnosis of anterior or posterior crossbite?
1) Habitual position
2) Lateral shift
3) Maximum intercuspation
4) The point of first contact at centric relation
Orthodontics
Answer: 3
Quad helix
1) Widens the upper arch
2) Is used in cleft lip
3) Retracts the upper canine
4) Is a bite-opening device
Orthodontics
Answer: 1
Tooth movement difficult to achieve
1) Intrusion and extrusion
2) Intrusion and translation
3) Tipping and rotation
4) Tipping and rotation
Orthodontics
Answer: 2
The ratio of skeletal: dental expansion obtained finally after rapid palatal expansion is
1) 4:1
2) 3:1
3) 2:1
4) 1:1
Orthodontics
Answer: 4
Downward and forward growth of face is the result of
1) Upward and backward growth of condyle and maxillary sutures
2) Eruption of teeth and increase in vertical direction
3) Upward and forward growth of cranial base
4) None of the above
Orthodontics
Answer: 1
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