AIPGE 2005 Dental 13

121. The average diameter of coronal dentinal tubules near the pulp is -

1. 0.2 – 0.5 microns.
2. 2 – 3 microns.
3. 0.2 – 0.3 microns.
4. 4 – 7 microns.

122. Ecologic determinants of plaque depend on all, except -

1. Sugar content of diet.
2. Host resistance.
3. Age and sex of the patient.
4. Status of dentition.

123. Salivary pellicle is composed of the following, except -

1. Immunoglobulin G.
2. Immunoglobulin A.
3. Amylase.
4. Albumin.

124. Caries detection dye can stain the following, except -

1. Granular nacrotic tissue.
2. Dry, leathery dentin.
3. Reversibly denatured collage.
4. Irreversibly denatured collage.

125. Torsional force is -

1. Compression.
2. Tensile force.
3. Shear.
4. Transverse bending force.

126. All of the following are true for traditional solution, except -

1. It is not necessary in moderately deep cavities under glass ionomer restoration.
2. Have film thickness of 1 – 50 microns.
3. Do not provide thermal or electric insulation.
4. Protect the pulp from reaction products leaching out of restoration.

127. One of the following is not true about treatment of dentinal hypersensitivity with dentin bonding agents -

1. It denatures protein.
2. It forms a hybrid layer.
3. It does not alter dentin permeability.
4. It forms resin tags into dentinal tubule.

128. Which of the following is not true about hand instruments used in operative dentistry?

1. They are generally made of stainless steel.
2. Nickel-Cobalt-chromium is never used in its fabrication.
3. Carbon steel is more efficient than stainless steel.
4. It can be made with stainless steel with carbide inserts.

129. Which one of the following does not commonly survive in a periapical lesion?

1. Pseudomonas.
2. Streptococcus.
3. Porphyromonas.
4. Actinomyces.

130. In endodontic surgery, which of the following about chromic gut suture is not true -

1. It properties are inferior to plain gut suture.
2. It is coated with chromium tri-oxide.
3. It is less biocompatible than plain gut suture.
4. Its absorption is faster than the plain gut sutures.