利用体外培养人ＴＭＪ滑膜细胞，对其超微结构进行了研究，发现ＴＭＪ滑膜部分细胞胞膜表面分布少量微绒毛。透射电镜发现滑膜细胞可根据细胞器结构和分布将细胞分为两大类，一类为Ａ型细胞富含溶酶体，可能具有吞噬功能，另一类为Ｂ型细胞含有丰富的粗面内质网和分泌颗粒，这些结构特点与沿膜细胞的功能有直接关系． The human TMJ synovial cells were cultured in vitro, and their ultrastructure was studied. A few microvilli were found on the membrane surface of TMJ synovial cells. Transmission electron microscopy showed synovial cells can be divided into two groups according to the structure and distribution of organelles, cells of type A are rich in lysosomes, may have phagocytosis, and the other is type B cells that are rich in in-plane The cytoplasmic and secreted granules are structurally related to the function of the membrane cells along the membrane.