Methods: in this group, we applied the skinsofttissueexpansion to repair the tissue defect of head face neck.
方法：采用国产硅橡胶扩张器行皮肤扩张术，修复耳鼻和头面颈部软组织缺损。
2
Objective to observe the quantity of drainage fluid after operation and to evaluate the application of negative pressure drainage in skinsofttissueexpansion.
目的通过术后引流量的观察，对负压引流在皮肤软组织扩张术中的应用作出评价。
3
Conclusion The stress of skinsoft-tissueexpansion can induce epidermal stem cells to proliferate and differentiate, which probably is an important biological basis for skinsoft-tissueexpansion.