英语语法分析

Retreatment after recurrence still may achieve good effect.

复发再治疗依然可能有效。

Objective To investigate and evaluate the method of the endodontic retreatment therapy failure.

目的对牙髓治疗失败牙再处理和疗效作出评价。

Conclusion: the management and treatment must be strengthen for retreatment and nonlocal patient groups.

结论：必须加强对复治病人和外地病人的管理和治疗。