Comparative study of effectiveness of two different micro power systems in removing the impacted supernumerary tooth in the maxilla

Abstract

Objective To find a more convenient, safe and effective extraction method, via comparing the extraction operation effect of the embedded supernumerary teeth in maxilla by using piezosurgery osteotomy or contra-angle high speed turbines. Methods One hundred and fifty patients (with a total of one hundred and ninety supernumerary teeth) who had accepted the extraction operation of the embedded supernumerary teeth in maxilla at Zhongshan City People′s Hospital from 2013 to 2017 were included. They were divided into two groups randomly. All of the patients had accepted the cone beam computed tomography (CBCT) examination to locate the embedded supernumerary teeth. The experimental group underwent the teeth extraction with piezosurgery osteotomy; while the control group with contra-angle high speed turbines. The postoperative pain (quantitatively analyzed by VAS) , operation time were compared between the two groups. The data were processed and analyzed by SPSS 20.0, and the mean and standard deviation of two groups were analyzed by independent sample t test. Results The average VAS value in the experimental group is 4.2 ± 1.5, while the average VAS value in the control group is 5.2 ± 1.6. The postoperative pain in the experimental group is less than the control group significantly (t=-4.072, P<0.001) . In the groups of patients over 12 years old, the average VAS value in the experimental group is 4.2±1.5, while the average VAS value in the control group is 5.1±1.6. The postoperative pain in the experimental group is less than the control group significantly (t=-2.866, P= 0.005) . The average operation time of the experimental group is (48±6) min while the average operation time of the control group is (51±8) min. The operation time of the experimental group is less than the control group significantly (t=-3.014, P= 0.003) . While in the groups of patients over 12 years old, the average operation time of the experimental group is (46 ± 6) min while the average operation time of the control group is (49 ± 7) min. The difference of operation time between the two groups is not significant (t=-0.901, P= 0.060) . Conclusions Using the CBCT guided piezosurgery osteotomy to remove the impacted supernumerary tooth in the anterior maxilla, can lessen postoperative pain, shorten operation time, and provide more comfortable experience. Key words: Tooth, impacted; Tooth, supernumerary; Tooth extraction, minimally invasive; Cone beam computed tomography; Piezosurgery; Micro Power Systems