The cells that form secondary dentin are_______________? A. Cementoblasts B. FibroblastsC. Odontoblasts D. Osteoblasts

Which of the areas of the tooth is most sensitive during cavity preparation ? A. Enamel (anterior teeth) B. Enamel (Posterior teeth) C. DentinD. Dentinoenamel junction

Transmission of stimulus across dentin is______________? A. Direct activation of nerve endings B. Correlated with the innervation density of the dentinC. Stimulus induced fluid flow D. There is no transmission of stimulus across dentin

During the formation of primary teeth_______________? A. Enamel forms more cervically than dentin B. Enamel forms faster than dentinC. Dentin forms faster than enamel D. Processes of their cells remain in content with each other

Compared to the inter tubular dentin, peritubular dentin is characterized by which of the following ? A. Greater stainability B. Lasser content of inorganic saltsC. greater content of inorganic salts D. Greater content of large collagen fibres

All factors govering dentine permeability EXCEPT_______________? A. Smear layerB. Fluid convection C. Length of dentinal tubules D. Diffusion coefficient

The average diameter of coronal dentinal tubules near the pulp is____________? A. 0.2-0.5 micronsB. 2-3 microns C. 0.2-0.3 microns D. 7 microns

All of the following is true about dentinal tubules except______________? A. Inner pulpal layer contains more dentinal tubules than outer dentin layerB. The diameter of dentin tubules ranges from 5 to 7μm C. The diameter of dentinal tubule is more…

S shape of dentinal tubules is due to______________? A. Incremental deposition B. Peritubular dentinC. Crowding of odontoblasts D. Due to excess amount of organic component

Dentin formed through out the life is______________? A. Sclerotic dentinB. Secondary dentin C. Reparative dentin D. All of the above