Eligibility criteria
carious lesions, incisors, non-carious cervical lesions, pain, fluorosis, bruxism
ENDODONTICALLY TREATED TEETH, PERIODONTAL DISEASES, ADVERSE REACTION, TOOTH SENSITIVITY
Patients were selected according to the following inclusion criteria: absence of carious lesions; good oral soft tissue health; absence of unsatisfactory and/or fractured restorations; absence of periodontal diseases; absence of non-carious cervical lesions and exposed dentinal tissue in the incisal areas; no history of adverse reaction to peroxides; shade of canines and incisors teeth should be at least A2 (according to Vita Classical Shade Guide, Bad Sackingen, Germany); absence of teeth with spontaneous pain; aged between 18-30 years.The exclusion criteria were: presence of proximal and/or vestibular restorations in the incisor and/or canine teeth; teeth with fixed orthodontic appliances and with resinous residues after bracket debonding; pregnancy; breastfeeding; smoking; routine alcohol use; previous dental bleaching treatments; teeth with fluorosis, enamel stains; endodontically treated teeth; bruxism habits; experiencing tooth sensitivity before this study; unacceptance of the research consent form and/or unavailability/lack of commitment to the research (
