本文通过对支托间隙斜度的数理分析,讨论了支托间隙斜度与支托力作用点的关系。发现当支托力作用点在牙齿边缘时,支托间隙斜度可按徐普等(1992)的观点进行设计;当支托力作用点向牙齿面中央移动时,支托间隙斜度应相应减少;如果支托的力作用点正好在牙齿中央,则支托间隙底应与基牙长轴垂直。 In this paper, by mathematical analysis of the  support gap slope, the relationship between  support gap slope and 作 support force point is discussed. It is found that when  support force point at the edge of the tooth,  support gap slope can be Xu Pu et al (1992) point of view to design; when  support force point to the center of the tooth surface,  support The slope of the gap should be reduced accordingly. If the force application point of the  bracket is exactly at the center of the tooth, the bottom of the  bracket should be perpendicular to the long axis of the abutment.