Least reliable sign of pulpal disease in primary teeth:

Q. Which of the following is the least reliable sign of pulpal disease in primary teeth?
 A. Electronic pulp test
B. Spontaneous pain
C. Internal resorption
D. Furcal radiolucency
E. Swelling

The correct Answer is A. Electronic pulp test

Electronic pulp testing is very unreliable in primary teeth because the A fibers that are more easily stimulated by electricity appear late in pulpal maturity.

The accuracy of the pulp testing may also be affected by the patient's ability to describe their response to the stimuli, to which, pediatric patients are typically not as able to describe their experiences in a clinically relevant way.

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