Objective To investigate the clinical effect of minimally invasive extraction of anterior toothresidual root after root separation. Methods A total of 400 patients receivinganterior tooth residual root extractionwere collected in the clinic of oral and maxillofacial surgery department between January 2015 and December 2016.The patients were divided into a control group and a study group according to their sequence to see the doctor,withan odd for the study group and an even for the control group. In the stu...