Participants
bleeding, they:•, tooth malposition, trauma
SYSTEMIC DISEASE, BLEEDING, PERIODONTITIS, MAY, PLAQUE
Study subjects were consecutively recruited from patients attending two specialized periodontal clinics: (1) the Post-Graduate Periodontology Clinic at the Faculty of Odontology, Complutense University (Madrid, Spain) and (2) the specialist Periodontal Clinic—Antonio Bujaldón (Almería, Spain) between October 2016 and May 2021.Adult subjects (≥ 18 years) were included if presenting a minimum of 2 and a maximum of 4 adjacent RT1/RT2 GRs, at least one of them with a depth > 2 mm. RT2 GRs were only considered eligible when the interdental CEJ was not exposed. Subjects were not eligible if they:• suffered from systemic diseases contraindicating elective surgery• were affected by untreated periodontitis• were current smokers (self-reported)• presented inadequate level of self-performed oral hygiene (full-mouth plaque or bleeding scores ≥25%)Local exclusion criteria were furcation involvement, uncorrected trauma from toothbrushing, severe tooth malposition, and history of root coverage procedures.