(2) Cold
RITTER, COLD
Thermal stimuli from the microbrush sprayed immediately with ethyl chloride ice spray (Walter Ritter, Hamburg, Germany) were applied for 1 s to the teeth that had already been tested for air-blast and scored equal to or greater than 1. The Schiff sensitivity score was used to assess the subjects’ response to cold stimuli, following the standard suggested by Schiff et al