牙瘤系牙胚发育紊乱,由成牙组织发生的高分化良性肿瘤。现综合5例报告。例1:景××,男,12岁。左下颌反复肿痛3月余就诊于口腔科;发现(?)残根,(?)松动,牙龈充血水肿而拔除(?),并辅以抗生素治疗,但局部肿胀未消退。2月后再次就诊。检查:左下颌体部膨隆,左下颊沟变浅,质硬,压痛不明显。(?)牙槽脊瘘道深1.5cm,(?)未萌出,(?)区见淡黄色硬组织暴露,范围约0.3×0.5cm,X 线片示(?)区2×2cm 大小透光影象,内含密度高而均匀的阻光影团。覆盖于(?)牙胚(牙合)面。治疗。手术摘除。病理:肉眼见离体硬组织团块近似椭圆形,大小1.5×1.5×1 cm,大部被结缔组织包绕,剖面呈实性、坚硬、淡黄色,结构排列紊 Tooth germ lineage development disorders, from the teeth of the well-differentiated benign tumors. Now comprehensive 5 cases report. Example 1: King × ×, male, 12 years old. Repeated swelling and pain in the left mandibular were seen in the stomatology department for more than 3 months. The residual root (?) Was found to be loosened (?), And the gums were edematous and unplugged (?), Supplemented with antibiotics, but the local swelling did not subside. See you again after 2 months. Check: left mandibular body bulging, lower left cheek ditch, hard, tenderness is not obvious. (?) Alveolar fistula deep 1.5cm, (?) Did not erupt, (?) Area to see light yellow hard tissue exposure, the range of about 0.3 × 0.5cm, X-ray showed Image, containing a high density and uniformity of the blockade. Cover the (?) Tooth germ (occlusal) surface. treatment. Surgical removal. Pathology: naked eye see the body of isolated hard tissue mass is approximately oval, size 1.5 × 1.5 × 1 cm, mostly surrounded by connective tissue, section was solid, hard, light yellow, the structure of the order