近年，无托槽隐形矫治在正畸临床应用得日益广泛，而正畸医师在进行方案设计时常需面对减数与非减数这一大方向的重要抉择。本文从无托槽隐形矫治提供间隙的方法，选择减数与非减数方案的重要性和依据，以及具体临床策略几方面进行论述，强调应通过切牙、磨牙的定位以及数字化矫治模拟进行减数与非减数方案的精准判断。“,”Clear aligner (CA) treatment achieves therapeutic goals through digital dental models and tooth movement planning. In recent years, with the increasingly wider clinical application of CA, orthodontists are frequently faced with the important choice of tooth extraction or non-extraction in treatment planning. This article addresses the approaches of providing spaces, the importance and criteria of choosing extraction or non-extraction plans, and the strategy of using digital treatment simulation.