3- Pharmacological: chronic alcohol abuse, chronic narcotic drug abuse;
4- Psychological: fear, anxiety, apprehension;
5- Poor technique: this is the most common reason for failure. There are three most commonly occurring
problems with this technique:
-Inadequate mouth opening.
-Improper needle placement:
a) too low.
b) too far forward (laterally) or backward (medially) of the target area (need to insert the needle just
medial to the pterygomandibular raphe à depth of 20 to 25 mm)
-Haste: Waiting three to five minutes after the injection before starting the procedure.
7. Which one of the following is used in water fluoridation:
A. SnF
B. 1.23% APF
C. H2SiF
D. CaSiF - correct answer C. H2SiF
Explanation
, Water fluoridation:
1- Hydrofluosilicic acid = H2SiF6 (not H2SiF2)
2- Sodium silicofluoride = Na2SiF6
3- Sodium fluoride = NaF
8. The best way to clean a cavity before the placement of GIC is,
A. H2O2
B. Phosphoric Acid
C. Polyacrylic acid - correct answer C. Polyacrylic acid
Explanation
also called:
-Polycarboxylic acid
-Polyalkenoic acid
9. The most mineralised part of dentine is,
A. Peritubular dentine - correct answer A. Peritubular dentine
Explanation
NOT intertubular & NOT interglobular dentine.
10. A 45 years-old patient awoke with swollen face, puffiness around the eyes, and oedema of the upper
lip with redness and dryness. When he went to bed he had no swelling, pain or dental complaints.
Examination shows several deep silicate restorations in the anterior teeth but examination is negative for
caries, thermal tests, percussion, palpation, pain, and periapical area of ramififaction. The patient's
temperature is normal. The day before he had a series of gastrointestinal x-rays at the local hospital and
was given a clean bill of health.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Schoolflix. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.