AbstractUsing a split‐mouth technique in 20 patients, a comparison was made of the linear and scalloped incisions an used in the reverse bevel technique. Forty full thickness periodontal flap procedures were evaluated. The PII and GI were recorded and gingival fluid collected at operation and at weeks 1, 2, 3, 4 and 12 after operation. Pocket depths and attachment levels were noted and gingival contour assessed, using the Contour Index, pre‐operatively and 12 weeks after operation. Pain experience during the first week after operation was evaluated. No significant changes in PII occurred throughout the study. The GI and gingival fluid flow showed comparable trends. More inflammation was present after the linear incision during the first 2 weeks after operation. Clinically, satisfactory results were achieved for both scalloped and linear incision procedures as shown by the improvement in gingival contour, reduction in pocket depth, slight gain in attachment, lack of gingivitis and low plaque sco