Test of learning and memory: All the rats in each group were given learning and memory praxiology test 35 days after operation.
学习记忆测试：各组大鼠于术后第35天进行学习记忆行为学测试。
The incidence of heart and lung complications during earlier period of post-operation was significantly decreased in test group;
结果全组无死亡，无吻合口瘘发生，管胃组术后早期心肺并发症较对照组明显减少；
The experiment group for 102 cases with 180 roots, applying root length surveyor test its working length, undertake root preparing and filling up, took X ray after operation;
实验组102颗牙180个根管，用根管长度测量仪测量其工作长度，进行根管预备和充填，术后拍片；
The experiment group for 102 cases with 180 roots, applying root length surveyor test its working length, undertake root preparing and filling up, took X ray after operation;
实验组102颗牙180个根管，用根管长度测量仪测量其工作长度，进行根管预备和充填，术后拍片；
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