Oral Biology Flashcards
6 cards from real MFDS 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 flashcards as text
Dead tracts in dentine are caused by:
Answer: Degeneration of odontoblast processes
Dead tracts result from the death and retraction of odontoblast processes, leaving empty tubules that appear dark in ground sections.
Which cells phagocytose bone and hard tissue in the periapical region during root resorption?
Answer: Odontoclasts
Odontoclasts (also termed dentinoclasts or cementoclasts) are multinucleate cells analogous to osteoclasts that resorb dental hard tissues.
The incremental lines of von Ebner in dentine represent:
Answer: Daily growth increments
The lines of von Ebner are daily incremental lines in dentine reflecting the circadian rhythm of odontoblast secretion.
Which type of cementum covers the apical third of the root and contains cells?
Answer: Cellular mixed stratified cementum
Cellular mixed stratified cementum is found predominantly at the apical third and furcation areas and contains cementocytes entrapped during rapid deposition.
The principal fibres of the periodontal ligament that run obliquely and are most numerous are the:
Answer: Oblique fibres
Oblique fibres are the most numerous principal fibre group of the periodontal ligament, running from cementum to alveolar bone to resist axial forces.
Which salivary gland produces the most serous secretion relative to its total output?
Answer: Parotid
The parotid gland is purely serous and contributes approximately 25% of total salivary volume but nearly all the amylase-rich serous component.