牙龈和牙周侧方囊肿是一个可能具有破坏作用的实体。牙龈囊肿能向内扩张并穿行到牙骨质表面;从牙周韧带发生的病变能表现为牙龈肿胀。本文报告三例已确诊的、各有特点的牙龈囊肿。其中两例发生在同一患者的邻近部位。两例是五十岁的妇女。有单一病变的患者主诉六个月以来在下颌左侧单尖牙、第一双尖牙区出现反复肿胀。临床检查表现为一 Gingival and periodontal cysts are a potentially damaging entity. Gingival cysts can expand inwardly and pass through to the cementum surface; lesions that develop from the periodontal ligament can manifest as swollen gingiva. This article reports three cases of proven gingival cysts that have their own characteristics. Two of these cases occurred in the vicinity of the same patient. Two cases are women in their fifties. Patients with a single lesion complained of unilateral canines on the left mandible for six months and repeated swelling in the first bicuspid area. Clinical examination showed one