Reciprocial movements of endodontic files - simpler and more certain therapeutic procedure. (English)

Numerous technological solutions in recent years have significantly improved the cleaning and shaping of canals and made canal instrumentation simpler, more efficient and safer. Significantly faster and less stressful canal instrumentation for the therapist is enabled by the specific design of the file working part and a special thermal modification of NiTi alloy with a change in the movement dynamics of the file in the canal. Research has shown that the problem of cyclic fatigue and torsional stress of the file during canal preparation can be solved by changing usual continuous rotation of the file. Dental technology has introduced the technique of reciprocal movements as an alternative to full file rotation. This change in file rotation direction during instrumentation, based on the technique of balanced forces, significantly reduces contact surface with the canal wall, eliminates the effect of screwing, extends the life of the file and further increases safety of instrumentation of different canal systems. An important advantage of changing the usual dynamics of file movements is that the concept of reciprocal movements is based on the use of only one file, which in addition to shortening treatment time also makes this intervention safer and with significantly lower percentage of defects and fractures of NiTi files. The aim of this paper was to present the concept of canal instrumentation with NiTi files with reciprocal movements as well as development, properties and possibility of application of these files in different clinical situations. [ABSTRACT FROM AUTHOR]

Brojna tehnološka rešenja poslednjih godina značajno su unapredila čišćenje i oblikovanje kanala i preparaciju kanala učinila jednostavnijom, efikasnijom i sigurnijom. Specifičnim dizajnom radnog dela instrumenta i posebnom termičkom modifikacijom NiTi legure uz promenu dinamike kretanja turpije u kanalu omogućena je znatno brža i za terapeuta manje stresna obrada kanala. Istraživanja su ukazala da se problemi cikličnog zamora i torzionog naprezanja instrumenta tokom preparacije kanala mogu rešiti promenom uobičajene kontinuirane rotacije turpije. Kao alternativu punoj rotaciji turpije, dentalna tehnologija je predstavila tehniku recipročnih pokreta. Ova naizmenična promena smera rotacije turpije tokom obrade bazira se na tehnici balansiranih sila, značajno smanjuje površinu kontakta sa zidom kanala, isključuje efekat ušrafljivanja, produžava vek instrumentu i dodatno povećava sigurnost instrumentacije različitih kanalskih sistema. Važna prednost promene uobičajene dinamike kretanja turpija je i u tome što koncept recipročnih pokreta bazira na upotrebi samo jednog instrumenta koji osim što skraćuje vreme obrade, ovu intervenciju čini sigurnijom i sa znatno manjim procentom defekata i preloma NiTi instrumenata. Cilj ovog rada je da predstavi koncept preparacije kanala NiTi instrumentima sa recipročnim pokretima i prikaže razvoj, osobine i mogućnost primene ovih turpija u različitim kliničkim situacijama. [ABSTRACT FROM AUTHOR]

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