DIFFERENCES IN THE EFFECT OF TWO NICKEL TITANIUM ROTARY FILES PREPARATION TOWARD THE CHANGES ON ROOT CANAL CURVATURE Andree Darkim1, Wiena Widyastuti2*, Selviana Wulansari2, E. Arlia Budiyanti3
1Postgraduate student, Department of Conservative Dentistry, Trisakti University
2Lecturer of Postgraduate Program of Conservative Dentistry, Trisakti University
3Department of Pediatric Dentistry, Trisakti University