EVALUATION OF APICAL LEAKAGE OF DIFFERENT APICAL DIAMETER TEETH USED MTA COMBINED WITH INTERNAL MATRIX

Aim the aim of this study is to determine the effect of apical foramen diameter, and different application methods on the sealing ability of mta using computerized fluid filtration device. material and methods: 100 extracted human teeth were used for this study. in our study, apical foramen were prepared diameter of 1- 1.4 mm in width for to simulate the open apex with an immature teeth. mta was mixed according to manufacturer's recommendations, and was placed into the root canals which have a different apical foramen diameter. by four different ways (retrograde way, two-phased ortograde way, and ortograde with or without internal matrix way). the teeth were prepared for the microleakage test with computerise fluid-filtration method. measurements of fluid movement were made at intervals of 15-seconds and repeated 8 times and means of these measurements were recorded [ μl / (min * cmh2o * cm2) ]. spss 20 software was used for statistical analysis of apical leakage of data. the data was analysed with one-way anova and post-hoc tukey tests. results: the amount of leakage in groups the internal matrix used together with mta and two stages arranged mta are less than the group placed one step mta. conclusion: in our study, less apical leakage was determined in performed ortograde procedure with internal matrix. when this method is prefered clinically, the cases can be treated by less invasive application and reducing the number of surgery.