Development And Growth of Teeth

Dental lamina is active up to_______________? A. 1 year B. 2 years C. 3 yearsD. 4 years

Ectodermal cells in tooth bud are responsible for_______________? A. Determination of shape of crown and root B. Formation of periodontal ligament C. Formation of cementum D. Formation of pulp

In considering the process of eruption, the pre-functional eruptive stage of a tooth begins when the_____________? A. Bud stage begins B. Cap stage begins C. Bell stage beginsD. Dental lamina begins forming

Hertwig’s epithelial root sheath is made up of_______________? A. Outer and inner enamel epithelium B. Stratum intermedium C. Stellate reticulum D. Hyaline layer of Hopewell-smill

Following is derivative of dental lamina____________? A. Epithelial rests of Malassez B. Enamel pearlsC. Rests of serrae D. All of the above

Accessory canals result from____________? A. Defects in cementogenesis B. Dividing epithelial bridgesC. Break in Hertwig’s root sheath D. Adherent epithelial rests

A supernumerary tooth results from a deviation during_____________? A. Initiation B. Differentiation C. Apposition D. Calcification

Blood supply of ameloblast for most of its life cycle comes form_______________? A. Dental papilla B. Reduced enamel organC. Dental Sac D. Dental pulp

The successors of deciduous teeth develops form_______________? A. Successional lamina B. Dental lamina C. Stellate reticulum D. Neutral ectodermal cells

Outer and inner enamel epithelium first seen in____________? A. Bud stage B. Advanced bell stageC. Cap stage D. Bell stage