The basic unit of the tooth enamel is the:
(A.) Enamel rod
(B.) Enamel tuft
(C.) Enamel spindle
(D.) Enamel lamellae
Mini Boards Reviews for the National + Local Anesthesia Dental Hygiene Boards
Answer: (A.) Enamel rod
Enamel consists of small fish-shaped rods (prisms) that are lined up next to each other, collectively forming the enamel. Those rods extend from the DEJ (dentino-enamel junction) to the enamel surface.
Enamel tufts are defects caused by the hypomineralization of enamel rods near the DEJ.
Enamel lamellae are dentin cracks and defects that are present at the enamel.
Enamel spindles are the dentinal tubules near the DEJ created by odontoblasts that cross the basement membrane.
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