The present invention relates to a self-locking orthodontic appliance using magnetism to close-up, comprising: an orthodontic appliance body, having an arch wire slot to accommodate the arch wire a slider, engaged with the orthodontic appliance body and moved between an opened position and a closed position of the orthodontic appliance body and a positioning mechanism, comprising a guide pin on one of the orthodontic appliance and the slider, and a positioning part on one of the orthodontic appliance and the slide wherein the positioning mechanism is made of magnetic material, and the guide pin and the positioning part are engaged and fixed to each other by the magnetism and fix the slider on the opened position or the closed position of the orthodontic appliance body. The present invention may open and close the slider accurately, and provide convenient operation to the user.本發明有關於一種利用磁性閉合之自鎖齒列矯正裝置,包含:齒列矯正器主體,其具有弓線槽用以容納弓線;滑蓋,其係與齒列矯正器主體相互嚙合,並且在齒列矯正器本體之打開位置及閉合位置之間移動;以及定位機構,包含位於齒列矯正器主體與滑蓋之其中之一上的導銷、以及位於齒列矯正器主體與滑蓋之其中一個上的定位部;其中,定位機構係由磁性材料所構成,且藉由導銷與定位部彼此磁性吸引固定以將滑蓋固定於齒列矯正器本體之打開位置或閉合位置。本發明可利用磁力準確掌握滑蓋的開啟與關閉,且便於使用者操作。100‧‧‧自鎖齒列矯正裝置10‧‧‧齒列矯正器主體11‧‧‧弓線槽12‧‧‧定位槽13‧‧‧凹座14‧‧‧底座20‧‧‧滑蓋30‧‧‧定位機構31‧‧‧導銷32‧‧‧定位部321‧‧‧第一凹部322‧‧‧第二凹部
