In the process of root canal treatment, due to the complicated and variable anatomy of the root canal, complications such as instrument separation and pulp cavity perforation may occur, which will affect the treatment outcome. Our department adheres to the concept of minimally invasive treatment and developed the MR&R root canal treatment complications microprocessor system, which can efficiently remove the separated instrument, and help deliver the MTA bioactive materials to repair perforation, significantly improving the survival rate of a diseased tooth.