TY - JOUR AU - Vaudt, J; Bitter, K; Neumann, K; Kielbassa, A M TI - Ex vivo study on root canal instrumentation of two rotary nickel-titanium systems in comparison to stainless steel hand instruments JO - Int Endod J VL - 42 PY - 2009 DO - 10.1111/j.1365-2591.2008.01489.x L3 - PubMed-ID: 19125977 SP - 22 EP - 33 ER -