A total of 15 (female) patients, between 31 and 70 years, who were systemically and periodontally healthy and applied to the periodontology clinic for treatment, were included in our study. Criteria for inclusion in the study are having ≥15 permanent teeth excluding third molars, not using any orthodontic appliance, not being pregnant or breastfeeding, not having any uncontrolled chronic and/or auto-immune disease, and not smoking.

Free gingival graft for the treatment of a total of 21 teeth with gingival recession in the lower jaw incisors area, no bone dehiscence, and the amount of attached gingiva being at least 0.5 mm and at most 1.5 mm and modified apically positioned flap methods were randomly selected (coin toss) and applied by a single investigator (MY). Surgical methods were performed on a minimum of 1 and a maximum of 2 teeth in the treated areas.

Clinical periodontal parameters (plaque index (PI), pocket probing depth (PPD), bleeding on probing (BOP), gingival recession (GR) and clinical attachment level (CAL)) were recorded and evaluated at baseline, third months, first and second years. Periodontal measurements (keratinized tissue width (KTW), attached gingiva width (AGW)) recorded and evaluated at baseline, third months, first and second years.

Patient selection were selected according to selected criteria.

The width of the attached gingiva was calculated by measuring the distance from the crest of the gingival margin to the mucogingival junction and then subtracting the probing depth of the gingival sulcus from this distance on the particular tooth.

The width of the keratinized tissue was calculated by measuring the distance from the crest of the gingival margin to the mucogingival junction

Measurement of the depth of a sulcus or periodontal pocket determined by measuring distance from a gingival margin to the base of the sulcus or pocket with a calibrated periodontal probe.