Bismuth subsalicylate Application MCQ

Bismuth subsalicylate is used in the treatment of peptic ulcer primarily because of its ability to: 

a. Neutralize gastric acid 
b. Eradicate Helicobacter pylori 
c. Stimulate mucus secretion 
d. Inhibit acid secretion

Ans. (B). Eradicate Helicobacter pylori

The gram-negative bacillus Helicobacter pylori is believed to be a significant factor in the pathogenesis of duodenal ulcers. Ulcer treatment includes bismuth salts because they eradicate this organism and are effective in preventing ulcer recurrences. Bismuth preparations may also coat the ulcer base, adsorb pepsin, and enhance prostaglandin synthesis. 

Bismuth does not directly inhibit acid secretion or pepsin production and it is not an antacid. 

Ames test is a method for detecting

The Ames test is a method for detecting 

a. Carcinogenesis in rodents 
b. Carcinogenesis in primates 
c. Teratogenesis in any mammalian species 
d. Mutagenesis in bacteria

Ans. (D) Mutagenesis in bacteria

The Ames test is carried out in Salmonella and detects mutations in the bacterial DNA. Because mutagenic potential is associated with carcinogenic risk for many chemicals, the Ames test is often used to claim that a particular agent may be a carcinogen. However, the test itself only detects mutations. 

Prepared lingual wall

The prepared lingual wall for an anterior metal ceramic restoration is parallel to?

a. Cervical half of facial surface
b. opposing tooth
c. no relation
d. incisal third of facial surface

Correct Ans : A Cervical half of facial surface

In this portion porcelain veneering is not given.

- Tarpedo diamond is used to reduce the lingual axial surface and it simultaneously forms the chamfer finish line

-If the lingual axial wall is short, it can be lengthened by using the shoulder with the bevel to move the lingual wall

further towards the centre of the tooth.

Characteristics of "group-function" occlusion

The characteristics of "group-function" occlusion are:

A. The teeth on the non-working side make contact in lateral excursion.
B. The teeth on the working side make contact in lateral excursion.
C. Only the canine and lateral incisors make contact in lateral excursion.
D. The posterior teeth on both sides make contact in lateral excursion.


Ans is B

Unilateral balanced occlusion, which is also commonly known as group function, is a widely accepted and used method of tooth arrangement in restorative dental procedures today. Therefore, unilateral balanced occlusion calls for all teeth on the working side to be in contact during a lateral excursion. On the other hand, teeth on the nonworking side are contoured to be free of any contact. The group function of the teeth on the working side distributes the occlusal load The absence of contact on the nonworking side prevents those teeth from being subjected to the destructive, obliquely directed forces found in nonworking interferences.