ABSTRACT
Aims: To compare the apical extrusion of Enterococcus faecalis after instrumentation with three different Ni-Ti rotary instruments- An in vitro study. Settings and Design: In vitro study Methods and Material: Forty freshly extracted mandibular premolars were mounted in bacteria collection apparatus and root canals were contaminated with a suspension of Enterococcus faecalis. The contaminated teeth were divided into 4 groups of 10 teeth each according to rotary system used for instrumentation: Group1: Hyflex files, Group 2: GTX files, Group 3: Protaper files and Group 4: control group (no instrumentation). Bacteria extruded after preparations were collected into vials and microbiological samples were incubated in BHI broth for 24 hrs. The colony forming units were determined for each sample. Statistical Analysis Used: Statistical analysis was done using one way ANOVA followed by post hoc independent “t” test. Results: GTX files extruded least amount of bacteria followed by Hyflex files. Maximum extrusion of E. faecalis was seen in rotary Protaper group. Conclusion: Least amount of extrusion was seen with GTX files followed by Hyflex files and then rotary Protaper system.
Subject(s)
Bicuspid , Dental Pulp Cavity/microbiology , Enterococcus faecalis/isolation & purification , Humans , Root Canal Preparation/instrumentation , Root Canal Preparation/methods , Root Canal Therapy/instrumentation , Root Canal Therapy/methods , Tooth Apex/microbiology , Tooth Apex/surgeryABSTRACT
Dilaceration refer to an angulation or sharp bend or curve in the root or crown of formed tooth. It is usually occur due to trauma that lead to white or yellow brown discoloration, crown dilaceration, root dilacerations, crown duplication, root duplication, odontoma like malformation etc. This paper elaborated a useful clinical considerations for diagnosis and treatment planning of a severely dilacerated root of malformed tooth having turner’s hypoplasia.