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dental anatomy - 3 Questions
Reparative dentin is also called:1). Secondary dentin2). Tertiary dentin3). Primary dentin4). Mantle dentin
Tertiary dentin includes reactionary dentin (formed by surviving odontoblasts) and reparative dentin (formed by new odontoblast-like cells). It is atubular and irregular.
Type of collagen in dentin:1). Type II2). Type I (90%), Type III, V3). Type IV4). Type VII
Type I collagen makes up about 90% of the organic matrix of dentin. Small amounts of type III and V are also present. Type IV collagen is found in the basement membrane.
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.
MCQ