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A comparison of two methods of extracting upper nonvital molars

PURPOSE:To study the feasibility of extraction of upper nonvital molars using minimally invasive instruments.METHODS:Three hundred teeth with nonvital pulps were randomly divided into two groups.One hundred fifty teeth in the experimental group were extracted with minimally invasive instruments,while 150 teeth in the control group were extracted with routine instruments.The operation time,intraoperative and postoperative complications were recorded to assess the effects of the methods.Student’s t test and Chi-square test in SPSS13.0 software package were used for statistical analysis.RESULTS:The operation time of the experimental group was significantly shorter than that of the control group(P0.05),the intraoperative and postoperative complication incidence rate of the experimental group was significantly lower than that of the control group(P0.05).CONCLUSIONS:The minimally invasive tooth extraction is superior to the routine tooth extraction in extraction of upper nonvital molars.