Presurgical phase and treatment allocation
PD
PLAQUE
The three treatment groups were randomly allocated by a predetermined computer-generated randomization list.Consort checklist diagramCriteria to confirm eligibility to surgical intervention included: 1) Persistent interproximal PD > 6 mm (distance from base of pocket to gingival margin); 2) CAL > 5 mm (distance from base of pocket to cemento-enamel junction (CEJ); and 3) interproximal DBF > 3 mm. The baseline data for the following clinical and radiographic parameters were recorded with the aid of an acrylic stent: (i) plaque index (PI); (ii) gingival index (GI); (iii) PD; and (iv) CAL. Clinical measurements were recorded using a graduated UNC-15 periodontal probe.