Which is not true of laser caries detector readings?

Question

Quizplus · Accepted Answer

The laser caries detector does not detect interproximal caries,subgingival caries,or secondary caries under crowns,inlays,or restorations.
A false-positive is possible if plaque or food particles are present in fissures.
Carious tooth structure reveals higher degrees of fluorescence.A clean,healthy tooth exhibits little or no fluorescence.
One should not rely totally on the readings; the laser caries detector is not a stand-alone diagnostic tool.

Which Is Not True of Laser Caries Detector Readings