MDS PREP
Forces required for intrusion are in the range of
1) 10-15 g
2) 20-50 g
3) 25-30 g
4) 50-60 g
Orthodontics
Answer: 1
The reticular formation gives rise to which of the following extrapyramidal tracts?
1) Corticospinal tract
2) Reticulospinal tract
3) Vestibulospinal tract
4) Rubrospinal tract
E. Tectospinal tract
The reticulospinal tract arises from neurons in the reticular formation of the brainstem and projects to the spinal cord. It influences both voluntary and involuntary motor activities, modulating the excitability of motor neurons. The corticospinal tract arises from the cerebral cortex, the vestibulospinal tract from the vestibular nuclei, the rubrospinal tract from the red nucleus, and the tectospinal tract from the superior colliculus.
Postoperative oedema can be minimized by
1) Careful surgical manipulation of hard and soft tissues
2) Administration of antihistamines preoperatively
3) Application of heart immediately after the procedure
4) None of the above
Oral Surgery
Answer: 1
The intra-alveolar appliance is the
1) Transpalatal arch
2) Nancy palatal arch
3) Space regained
4) Distal shoe appliance
Pedodontics
Answer: 4
What is the recommended force for condensing a composite resin using a 0.5 mm diameter condenser nib?
1) 3.75 pounds
2) 8.43 pounds
3) 15 pounds
4) 0.04-0.4 µm
The recommended force for condensing a composite resin using a 0.5 mm diameter condenser nib is 3.75 pounds. This force is considered optimal and is well within the physiologic limits of the tooth.
A patient with a deficiency of which coagulation factor will have a prolonged PT and a normal aPTT?
1) Factor II
2) Factor V
3) Factor X
4) Factor XII
Factor II (prothrombin) deficiency leads to a prolonged PT (Prothrombin Time) because it is involved in the extrinsic pathway of the coagulation cascade, which is assessed by the PT test. The aPTT (activated Partial Thromboplastin Time) is normal because the intrinsic pathway is not affected.