A. Upper central incisors
B. Lower central incisors
C. Upper canines
D. Lower canines
✅ The correct answer is option B. Lower central incisors.
Medical
The number of line angles a permanent maxillary central incisor is_____________?
A. Two
B. Four
C. Six
D. Eight
✅ The correct answer is option C. Six.
Nasolacrimal duct is directed_____________?
A. Downward, Medially, Backwards
B. Downward, laterally, Backwards ‘(DLB)
C. Downward, laterally forward
D. Downward, medially forward
✅ The correct answer is option B. Downward, laterally, Backwards ‘(DLB).
All of the following is true about dentinal tubules except______________?
A. Inner pulpal layer contains more dentinal tubules than outer dentin layer
B. The diameter of dentin tubules ranges from 5 to 7μm
C. The diameter of dentinal tubule is more at pulpal layer than outer layer
D. The bonding is more on the inner layer of dentin compared to outer surface
✅ The correct answer is option B. The diameter of dentin tubules ranges from 5 to 7μm.
A special feature of the periodontal ligament fibroblasts is______________?
A. The number or organelles
B. Presence of actin fibres and shape change
C. size of the cells
D. Collagen fibre formation
✅ The correct answer is option B. Presence of actin fibres and shape change.
Periodontal ligament is made up of____________?
A. Type I collagen
B. Type I and Type III collagen
C. Type I and Type II collagen
D. Type I and Type IV collagen
✅ The correct answer is option B. Type I and Type III collagen.
Site of RBC formation in 20 years old healthy male is____________?
A. Flat bones
B. Long bones
C. Liver
D. Yolk sac
✅ The correct answer is option A. Flat bones.
The cells that form secondary dentin are_______________?
A. Cementoblasts
B. Fibroblasts
C. Odontoblasts
D. Osteoblasts
✅ The correct answer is option C. Odontoblasts.
Keratohyaline granules are found in________________?
A. St. granulosum
B. St. spinosum
C. St. basale
D. Prickle cell layer
✅ The correct answer is option A. St. granulosum.
Resorption of root of primary incisors starts at_____________?
A. 4 yrs
B. 6 yrs
C. 8 yrs
D. 10 yrs
✅ The correct answer is option A. 4 yrs.