Magic split is designed to test bone density after incision (Fig.1).  Since it is sharp and blade-shaped (Fig.2), it is used as a scalpel to penetrate the mucosa at the crest of #14 and tapped in for ~ 7 mm from the gingival margin.

第一次骨诊断

1. 用手力推动可进入   -不具备抵抗外力              超软质骨
2. 轻轻敲击可进入       -皮质骨可被推压              软质骨
3. 轻轻敲击无法进入   -皮质骨无法被推移变形  硬质骨

Magic Split

Xin Wei, DDS, PhD, MS 1st edition 11/07/2016, last revision 03/04/2018