Purple Dental Academy For Abroad Dentistry

23/02/2019

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19/02/2019

Answers to today's questions-

1. The correct answer is D.
Unmyelinated nociceptive C fibers with a diameter less than 1 jxm produce a pain with slow onset and a dull, diffuse quality. They are found mainly in the core of the pulp and are the most numerous nerve fibers. Answer A is incorrect. When stimulated, myeli¬nated A fibers produce a fast, localized sharp pain sensation. Answer B is incorrect. A fibers are myelinated. Answer C is incorrect. C fibers are unmyelinated. Answer E is incorrect. The subodontoblastic plexus of Raschkow is composed of the terminal portions of the A fibers as they branch off, lose their myelination, and rise to the coronal portion of the pulp around the level of the odontoblasts.

2. The correct answer is B.
The first number is a measure of the diameter of the tip of the k-file (30 = 0.30 mm). The second number is a measure of the length of the k-file (25 mm). The file diameter (taper) increases at a regular rate of 0.02 mm up the shaft of the instrument in k-files. Answer A is incorrect. The value 30 is the measure of the diameter of the tip of the file, not the length, and 25 mm is the measure of the length of the file, not the diameter of the tip. Answer C is incorrect. The taper of k-files is 0.02, not 30, although the measure of the length is 25 mm. Answer D is incorrect. While 30 is the measure of the diameter of the tip of the file, the taper of k-files is 0.02. Answer E is incorrect. The value 30 is a measure of the diameter of the tip of the file, and 0.02 would represent the taper of the file, not 25 mm.

19/02/2019

Questions for the day-

1. A patient presents to your office with a chief complaint of dull, diffuse pain in the lower right quadrant. The nerve fibers responsible for this sensation are:
A. Myelinated A fibers
B. Unmyelinated A fibers
C. Myelinated C fibers
D. Unmyelinated C fibers
E. Subodontoblastic plexus of Raschkow

2. You are instrumenting a canal with a size 30, 25 mm k-type file. What does each of the sizes denote, respectively?
A. The length ofthe file and the diameter ofthe tip of the file
B. The diameter of the tip of the file and the length of the file
C. The taper of the file and the length of the file
D. The diameter of the tip of the file and the taper of the file
E. The length of the file and the taper of the file

Answers and explanations to follow :)

07/02/2019

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06/02/2019

Answers to today's questions-

1. The correct answer is C. Prazosin, doxazosin, and terazosin are competitive alpha-1 receptor antagonists that are used to lower peripheral vacular resistance. They can be used to control hypertension and urinary retention. Side effects of these medications commonly include postural hypotension, headache, and dizziness.

2. The correct answer is D. Patient here presents with angioedema, a side effect of ACE inhibitors such as captopril, enalapril, and lisinopril. ACE inhibitors decrease the conversion of angiotensin I into angiotensin II, thereby preventing vasoconstriction and resultant increase in aldosterone. It is commonly used in the treatment of hypertension, especially in the context of other comorbidities such as diabetes mellitus. Other adverse effects of ACE inhibitors include cough, hyperkalemia, rash, taste changes, orthostatic hypotension, and liver toxicity. ACE inhibitors are contraindicated during pregnancy because of their potential for teratogenicity.

3. The correct answer is B. TCAs (e.g., amitriptyline, imipramine, nortriptyline, desipramine, trimipramine, doxepin, and clomipramine) can inhibit reuptake of norepinephrine and serotonin into presynaptic nerve terminals. Besides usage in depression, TCAs can be used in the treatment of neuropathy and panic disorders. Its side effects include antimuscarinic, antiadrenergic, and antihistamine effects such as dry mouth, orthostatic hypotension, and sedation. Serious adverse effects include coma, convulsion, and cardiotoxicity (arrhythmias).

06/02/2019

Q/A WEDNESDAY

1. What do prazosin, doxazosin, and terazosin have in common?
A. They are all alpha-2 receptor blocker that causes a decrease in peripheral vascular resistance
B. They are diuretics used to control hypertension
C. Side effects of the drugs include orthostatic hypotension
D. They are noncompetitive alpha-receptor blockers.
E. They rarely cause headache or dizziness

2. A 50-year-old patient with recent diagnosis of hypertension presents to your clinic complaining of a sudden increase in the size of his tongue and slight difficulty in breathing. He was recently started on an antihypertensive medication. Which one of the following drug classes may have caused the patient’s presentation?
A. Beta-blocker
B. Alpha 1-blocker
C. Thiazide diuretic
D. Angiotensin-converting enzyme (ACE) inhibitor
E. Calcium channel blocker

3. Which one of the following is true regarding tricyclic antidepressants (TCAs)?
A. They include phenelzine, isocarboxazid, and tranylcypromine
B. They inhibit reuptake of norepinephrine and serotonin into presynaptic nerve terminals
C. They are only used in depression
D. Arrhythmias are a concern with TCA overdose
E. Orthostatic hypotension rarely occurs

Answers and explanations to follow :)

31/01/2019

Jobs for aspiring dental graduates

30/01/2019

29/01/2019

Tuesday Topic

Summary of oral agents used to treat diabetes.

28/01/2019

Congratulations!

28/01/2019

Monday Motivation

Get better everyday!

26/01/2019

Celebrations!