Clinical assessment
JJ
COLD
Patients were assessed at baseline and at 2 and 4 weeks. The assessment was conducted by three authors of the study (JJ, HK and DK). At each assessment, the tooth surface was exposed to three different stimuli: air-blast, cold, and application of an acidic solution. Each stimulus was applied according to a standardized protocol, with a gap of 5 min according to Sowinski et al.