الفهرس | Only 14 pages are availabe for public view |
Abstract The purpose of this study was to compare beween Pro -Taper , Race , K3 and NRT rotary nickel titanium systems as regard to the amount of debris extruded apically and the cleanliness of root canal dentin wall after instrumentation with the four selected system . Forty human maxillary central incisors with completely formed apices and straight canals were selected . Standard access cavities ere prepared . |