The low density bone in the middle of the socket is ignored before osteotomy (Fig.2 *, 3 S (soft)).  The soft tissue is removed after osteotomy is done.

昨天庆幸做了切口，在S处开始钻洞，感觉骨质密度低。钻到4毫米后，低速用功螺纹钻头4.5和5.0毫米，稳定性差，S代表什么？

Regraft     Last     Next Xin Wei, DDS, PhD, MS 1st edition 07/17/2020, last revision 07/25/2020