48. Dental floss is used for cleaning which type of embrasures :

a) Type 1 b) 2
c) 3 d) all


ANS: A


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47.Perforators are not present at the:

a. Ankle b. Distal calf
c. Mid thigh d. Below the inguinal ligament

ANS. D
Explanation: -Perforators connect the superficial veins with the deep veins. -There are about 5 perforators along the great saphenous vein - 1.in the mid-thigh; 2. Below knee; 3, 4 & 5. near the lower leg and ankle. -Great saphenous vein itself drains into the femoral vein below the inguinal ligament.

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46.The secretory product of odontoblasts is:

a. Topocollagen. b. Calcium salts.
c. Mantle dentin. d. Hydroxyapatite

ANS.C

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