Incremental lines of Retzius appear_____________?

Related Mcqs:

1. Incremental lines of retzius are seen in______________?

   A. Enamel
   B. Dentin
   C. Cementum
   D. Pulp

2. All are true about the striae of retzius except___________?

   A. Constitute the rest lines with in the enamel rods
   B. Have high inorganic content
   C. They are areas of increased porosity
   D. Allow the movement of water and small ions

3. The shallow furrows on the enamel surface, where stria of Retzius end are known as _______________ ?

   A. Cracks
   B. Pellicle
   C. perikymata
   D. Enamel lamellae

4. Accentuated incremental lines in dentin are______________?

   A. Incremental lines of retzius
   B. Incremental lines of von Ebner
   C. Contour lines lines of owen
   D. None of the above

5. Accentuated incremental lines in dentin due to disturbances in matrix and mineralization process is_____________?

   A. Incremental lines of retzius
   B. Incremental lines of vonebner
   C. Contour lines of owen
   D. None of the above

6. Neonatal lines are found in all of the following except____________?

   A. Enamel of primary incisors
   B. Enamel of permanent canines
   C. Enamel and dentin of permanent first molars
   D. Dentin of permanent mandibular incisors

7. Neonatal lines are seen in_______________?

   A. Enamel of deciduous incisiors
   B. Enamel of permanent incisors
   C. Enamel of premolars
   D. Dentin of all teeth, as if is formed first

8. Reversal lines which may be seen on the cribriform plate (alveolar bone proper) of the alveolar process indicate the cessation of____________?

   A. Osteoblastic activity
   B. Osteoclastic activity
   C. Myeloid activity
   D. Healing activity

9. In a thrombus, the dark lines of zahn are due to_______________?

   A. Coagulated fibrin
   B. Aggregated proteins
   C. Aggregated platelets
   D. Aggregated R.B.C

10. White radiating lines can be observed in case of lesions of:___________?

    A. Lichen planus
    B. Erythema multiforme
    C. Pemphigus
    D. Leukoplakia