Surgical interventions
MR
All surgical interventions were carried out by two trained specialists (MR and JGF). Prior to the intervention, the CEJ was identified in the selected teeth; if not readily present, it was reconstructed with adhesive dental materials using the adjacent and contralateral teeth as reference. Conversely, any restorative materials invading the root surface was removed up to the CEJ.The interventions started in all included subjects with a CTG harvesting from the palatal mucosa through the de-epithelized free gingival graft (FGG) technique [- TUN + CTG (test group)- CAF + CTG (control group)Images illustrating interventions by group allocation. 