Each system has its unique design and advantages and no one system is truly better. The most common feature in the majority of the rotary files, is the radial land, which is illustrated by brackets in Figure 1. By adding mass peripherally, the radial land prevents uncontrolled cutting into the canal walls. This minimizes transportation and contributes to the strength of the instrument. The files cut with a planning, rather than a scraping action, resulting in a more centered canal.
Quantec instruments have several unique design features.
First, the peripheral strengthening feature inherent in the radial land has been accentuated. The lands are wider than those of the Profile and a double radial land has been incorporated to reduce friction. Secondly, the Quantec files have a slightly positive cutting angle which allows the flutes to cut rather than scrape the dentin unlike the Profiles which plane. Thirdly, the helical angle increases from 30 at the tip, to 45 near the shank. This assists in rapidly channeling debris out of the canal.