Atr Technika Endo Motor Manual
Libeniger Sa
Introduction. WaveOne is a single endodontic instrument thatreciprocates with a dedicated motor to shape root canal systems. The presentstudy assessed the centering ability of this simplified protocol along withthe effect of experience in simulated plastic canals. Methods. Oneexperienced operator shaped two groups of simulated canals. Groups 1 and 3each comprised 30 blinded L-shaped canals or S-shaped canals, respectively.Photographs were taken before and after shaping and digitally assessedcentering after superimposition of the pictures. Time of shaping, number ofpasses, canal aberrations, and instrument degradation were recorded. In group2 shaping was done on 30 blinded L-shaped canals by 30 different studentswith no prior experience with WaveOne. Results. All three groups yieldedsatisfactory, reproducible shaping. Centering ratios were low and homogeneousin all groups, with no significant differences between the experiencedoperator and the students. Apical transportation values were very low ([lessthan or equal to] 0.138 mm) with no instances of blockage or separation. Theaverage shaping time was short (43 to 101,6 sec). Conclusions. Within thelimits of the study, the WaveOne instrument had excellent centering abilitywith a low risk of fracture or blockage and a short shaping time, regardlessof the operator's level of experience.
Nickel-titanium (Ni-Ti) rotary files are an important adjunct inclinical endodontics [3]. They produce smooth-tapered canal preparations withreproducible results, even when performed by novice students [22]. Comparedto manual stainless steel instrumentation, inexperienced operators achievedbetter canal preparations with rotary NiTi instruments but rotary preparationwas associated with significantly more fractures [23]. Most studies comparingexperienced and novice operators found differences in shaping ability andefficiency [22, 24]. Therefore, practice and experience are indispensable forsafe application of this technique [25]. However, no significant differenceswere found in the present study, suggesting that there is a very shortlearning curve for the reciprocation technique and that it is suitable forteaching purposes, especially considering that all of the shaping was doneblindly.
aa06259810