This book is a detailed description of various flap designs used in Periodontal surgery. The primary objective of periodontal flap surgery is to gain access to the root surfaces and bone defects so that deposits on root surface can be eliminated and granulation tissue can be removed. The design of the flap is dictated by surgical judgement of the operator and may depend on the objectives of the operation. The degree of access to underlying bone and root surfaces necessary and final position of the flap must be considered in designing the flap. Every clinician before deciding which flap designs to be used requires enormous knowledge and a clear picture of he/she will proceed towards the surgery depending on each patient's specific clinical needs. This book is complete guide on various flap designs and their modifications that can be beneficial to the patient.