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  Indian J Med Microbiol
 

Figure 5: Schematic diagram of keystone flaps: An incision at 90° at either end of the defect meets the curvilinear line of the flap mark out. The width of the flap is approximately double the width of the defect. This curvature or keystone shape is then mobilized. Flap length is governed by the length of the elliptical excision

Figure 5: Schematic diagram of keystone flaps: An incision at 90° at either end of the defect meets the curvilinear line of the flap mark out. The width of the flap is approximately double the width of the defect. This curvature or keystone shape is then mobilized. Flap length is governed by the length of the elliptical excision