As indicated by data of settlement observation underpinning with tree rootpile prevented the unequal settlement of building effectively.
沉降观测资料表明，采用树根桩托换技术有效地制止了建筑物的不均匀沉降。
2
Objective To note that the traditional pile of metal casting is still the important methods for root and crown restoration.
目的说明传统的铸造金属桩核仍是修复残根残冠的重要方法。
3
Methods:Two kinds of pile nuclear crown prosthesis were made and the break of pile nuclear and root canal, the fall off of the pile and cervical margin were compared.