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   Apical transportation associated with ProTaper® Universal F1,F2 and F3 instruments in curved canals prepared by undergraduate students  
   
نویسنده brito-júnior m. ,faria-e-silva a.l. ,camilo c.c. ,pereira r.d. ,braga n.m.a. ,sousa-neto m.d.
منبع journal of applied oral science - 2014 - دوره : 22 - شماره : 2 - صفحه:98 -102
چکیده    Objective: this study evaluated apical transportation associated with protaper® universal f1,f2 and f3 rotary files in curved canals prepared by undergraduate students. material and methods: twenty mesial roots of mandibular molars with curvatures ranging between 25° and 35° were selected. mesiobuccal canals were instrumented by twenty students with the protaper® system (dentsply-maillefer,ballaigues,switzerland) according to the manufacturer's instructions. pre-faring was performed with s1 and sx files. a #15 k-file was inserted into the root canal up to the working length (wl),and an initial digital radiograph was taken in a buccolingual direction (baseline). afterwards,the s1,s2,f1,f2,and f3 files were employed up to the wl. other radiographies were taken in the same orientation of the baseline after the use of the f1,f2,and f3 files,with each file inserted into the root canal. the radiographic images were overlapped,and the image j software was used to measure the distance between the rotary files' ends and the #15 k-file's end,characterizing the apical transportation. data were analyzed by repeated measure anova and by the snk post hoc test (p<0.05). results: it was verified that file size affected apical transportation significantly (p<0.001). the f3 file showed higher apical transportation than f1 and f2,while between these last files there was no difference. conclusion: the undergraduate students produced lower apical transportation in curved canals when they did not use the f3 rotary file.
کلیدواژه Root canal preparation; Root canal therapy; Undergraduate medical education
آدرس state university of montes claros,montes claros,mg,brazil,department of restorative dentistry,university of são paulo,ribeirão preto,sp, Brazil, department of dentistry,federal university of sergipe,aracaju,se, Brazil, state university of montes claros,montes claros,mg, Brazil, department of dentistry,united universities of the north of minas,montes claros,mg, Brazil, department of restorative dentistry,state university of montes claros,montes claros,mg, Brazil, department of restorative dentistry,university of são paulo,ribeirão preto,sp, Brazil
 
     
   
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