MDS PREP
What are the requirements for a good temporary cementing agent?
1) High compressive strength and good thermal conductivity
2) Low compressive strength and good thermal conductivity
3) High compressive strength and low thermal conductivity
4) Low compressive strength and low thermal conductivity
The ideal requirements for temporary cements include promoting the healing process and having a low compressive strength to facilitate removal.
Commonest cause of TMJ ankylosis is
1) Trauma
2) Development disturbances
3) Infections
4) Atrophy
Oral Surgery
Answer: 1
The best method to patch a leaking rubber dam
1) Apply calcium hydroxide
2) Apply cavity varnish
3) Suturing with silk
4) None
Conservative Dentistry
Answer: 1
What is the role of factor Xa in the coagulation cascade?
1) Activation of fibrinogen to fibrin
2) Conversion of prothrombin to thrombin
3) Activation of factor V
4) Activation of factor VIII
Factor Xa is a serine protease that plays a pivotal role in the common pathway of the coagulation cascade. It, along with factor Va, forms the prothrombinase complex that converts prothrombin (factor II) to thrombin (factor IIa), which in turn activates fibrinogen to form fibrin, leading to clot formation.
Endodontic therapy is said to be successful when following changes occur in periapical region
1) Formation of cementum
2) Regeneration of alveolar bone
3) Regeneration of PD ligament
4) All of the above
Endodontics
Answer: 4
Opioids have been shown to bind specifically with the receptor for
1. acetylcholine
2. serotonin
3. gamma-amino butyric acid
4. enkephalins
Pharmacology
Answer: 4
Which one of the following drugs increases gastrointestinal motility?
1) Glycopyrrolate.
2) Atropine.
3) Neostigmine.
4) Fentanyl.
Pharmacology Answer: 3
Synthetic opioids, sharing properties of opium and morphine, include meperidine, propoxyphene, diphenoxylate, fentanyl, buprenorphine, methadone, and pentazocine. Various opiate effects are analgesia, respiratory depression, constipation, and euphoria.
Fentanyl (80 to 100 times more powerful than morphine) is especially dangerous.
Atropine blocks the muscarinic receptors. Atropine decreases gastrointestinal tract motility and secretion and causes constipation.
Although various derivatives and congeners of atropine (such as propantheline, isopropamide, and glycopyrrolate) have been advocated in patients with peptic ulcer or with diarrheal syndromes
Neostigmine is Cholinesterase inhibitors that enhance the effects of parasympathetic stimulation and leads to reversal of intoxication by agents with a anticholinergic action