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
Which cells are responsible for forming dentine?
Answer: Odontoblasts
Odontoblasts are the specialised cells derived from neural crest cells that synthesise and secrete the organic matrix of dentine.
What is the predominant inorganic component of enamel?
Answer: Hydroxyapatite
Hydroxyapatite [Ca10(PO4)6(OH)2] constitutes approximately 96% of the dry weight of mature enamel.
Which type of collagen predominates in the pulp and dentine matrix?
Answer: Type I
Type I collagen is the major fibrillar collagen of dentine and pulp, providing tensile strength to the matrix.
Hertwig's epithelial root sheath is derived from which structure?
Answer: Enamel organ
Hertwig's epithelial root sheath forms from the fusion of the inner and outer enamel epithelium at the cervical loop of the enamel organ.
Which zone of the dental pulp is immediately deep to the odontoblast layer?
Answer: Cell-free zone of Weil
The cell-free zone of Weil (also called the subodontoblastic zone) lies immediately beneath the odontoblast layer and is characterised by a relative absence of cell bodies.
Perikymata are surface features found on which dental tissue?
Answer: Enamel
Perikymata are the external manifestations of the striae of Retzius, appearing as transverse ridges on the enamel surface.