Self adjusting file

Od početka modernog doba endodoncije, javljali su se brojni koncepti, strategije i tehnike za obradu kanala, te je do danas razvijen veliki broj različitih instrumenata. Zajednička zabluda većine stomatologa u današnje vrijeme jest tendencija da se odnose prema svim korijenskim kanalima kao da imaju jednak okrugli poprečni presjek. To se možda odnosi na pojedine dijelove korijenskih kanala nekih zubi (npr. gornjih sjekutića), no većina korijenskih kanala je izuzetno nepravilna. Samoadaptirajući instrument je primjer potpuno novog koncepta u obradi korijenskih kanala. Prije svega, to je sustav koji ujedinjuje irigaciju i instrumentaciju istovremeno. Poseban dizajn instrumenta za obradu kanala omogućuje njegovo komprimiranje unutar kanala i prilagodbu trodimenzionalnoj konfiguraciji korijenskog kanala, ma koliko ona bila komplicirana, bez straha od pucanja. Pored toga, taj instrument ima sposobnost cirkumferencijalnog uklanjanja dentina što omogućuje bolju adheziju budućeg punjenja uz stjenke kanala. Površina samoadaptirajućeg instrumenta ima hrapavost 2,8 μm ± 10%, što mu daje strugajuća svojstva i zaglađuje stjenke kanala. Ostvaruje vibraciju od 5000 rpm. Sa samoadaptirajućim instrumentom se postiže cilj minimalne redukcije i jednolikost preostale debljine stjenke kanala. Prevencija preko instrumentacije, izvan granice apikalnog foramena, kontinuirana irigacija korijenskog kanala natrijevim hipokloritom i visoka izdržljivost, samo su neke karakteristike koje čine ovaj instrument začetnikom nove moderne ere u endodonciji.Since the beginning of modern day endodontics, there have been numerous concepts, strategies, and techniques for preparing canals. Throughout decades, a staggering array of files has emerged for negotiating and shaping canals. In spite of the design of the file, the number of instruments required, and the surprising multitude of techniques advocated, endodontic treatment has been typically approached with optimism for probable success. The common misconception today is that dentists tend to relate to all root canals as if they had a uniform round cross section. This is true for the upper incisors, but wrong for every other tooth in maxilla and mandible. The Self-adjusting file (SAF) brings a new concept to the table in terms of root canal treatment. First of all, it is a system that combines irrigation and instrumentation at the same time. The special design of the instrument allows its compression inside the canals and three dimensional adjustment, no matter how complicated the configuration of root canal is, without fear of breakage. In addition, this instrument has the ability of circumferential removal of dentin to give better adhesion of the future filling and the canal wall. Surface of the SAF has a roughness of 2.8 μm ± 10 % which gives a file scraping feature and a possibility to smoothen walls of the root canal. It generates a vibration of 5000 rpm. With the SAF, goals like minimal reduction and uniformity of the remaining wall thickness become achievable. The prevention of canal transportation, continuous irrigation with sodium hypochlorite and high durability are just a few specifications that make this system a step towards a whole new era in modern endodontics