摘要被动就位是种植修复成功的重要条件，对无牙颌种植固定修复尤为关键。精准被动就位的获得是通过对整个修复体制作流程的精细控制，采用口内焊接技术，直接在口内连接金属支架与种植上部配件，可以保证种植修复体获得精准稳定的被动就位。本文从被动就位的定义、必要性、影响因素以及临床控制方法等方面进行阐述，以期为无牙颌种植修复体取得精准被动就位提供参考。

abstractsPassive fit is a key prerequisite for successful implant-supported restorations, especially for full-arch implant-supported fixed restoration. The precise passive fit comes from the fine control of the entire manufacturing process of resorations. Intraoral welding directly connects the metal framework and the upper abutment in the mouth, which can ensure precise and stable passive fit. This article will explain the definition, necessity, influencing factors and clinical control methods of passive fit, in order to provide guidance for achieving precise passive fit in implant-supported full-arch prostheses.