Oral Biology and Histology Flashcards
6 cards from real INBDE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Oral Biology and Histology flashcards as text
Which type of dentin is formed in response to irritation or injury?
Answer: Tertiary (reparative) dentin
Tertiary (reparative) dentin is produced by newly differentiated odontoblast-like cells as a protective response to local stimuli such as caries or trauma.
The principal fiber group that resists intrusive forces on a tooth is:
Answer: Oblique fibers
Oblique fibers are the most numerous PDL fibers and are oriented at 45° to resist vertical (intrusive) occlusal forces by converting them into tensile forces on alveolar bone.
Amelogenesis imperfecta primarily affects which aspect of tooth development?
Answer: Enamel matrix formation and/or mineralization
Amelogenesis imperfecta is a hereditary condition affecting the quantity and/or quality of enamel due to defects in enamel matrix proteins or their regulation.
Which enzyme found in saliva initiates carbohydrate digestion?
Answer: Salivary amylase (ptyalin)
Salivary amylase (ptyalin) cleaves alpha-1,4 glycosidic bonds in starch, initiating carbohydrate digestion in the oral cavity.
The zona pellucida of the enamel organ is also known as:
Answer: Stellate reticulum
The stellate reticulum is the star-shaped cell layer of the enamel organ that provides a cushioning effect and nutrition to the inner enamel epithelium.
Cementum is thickest at which region of the root?
Answer: Apical third
Cementum is thickest at the apex (apical third) of the root, where it can be 200–600 μm thick, compensating for passive eruption and wear.