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Dental Anatomy - 3 Questions
Dentinal fluid is:1). Pure water2). Extracellular fluid / transudate of plasma from pulp via odontoblasts3). Saliva4). Intracellular fluid
Dentinal fluid is the basis of the hydrodynamic theory of sensitivity. Fluid movement in tubules stimulates mechanoreceptors near the pulp. Normally, there is an outward flow.
Which is NOT present in odontoblasts?1). Golgi saccules2). Rough endoplasmic reticulum3). Desmosome-like junctions4). Numerous processes forming striated border
Odontoblasts are protein-synthesizing cells with abundant RER, Golgi, and mitochondria. They have one main process (Tomes' fiber) and are connected by junctional complexes. A striated border is characteristic of intestinal absorptive cells, not odontoblasts.
Cause of interglobular dentin increased in rickets:1). Vitamin D deficiency leads to failure of calcospherite fusion2). Fluoride excess3). Calcium excess4). Vitamin A deficiency
Vitamin D deficiency leads to hypomineralization due to a low calcium-phosphate product. Globular mineralization fails, increasing interglobular dentin.
MCQ