Segall R O, del Rio C E, Brady J M, Ayer W A
Oral Surg Oral Med Oral Pathol. 1977 Sep;44(3):463-7. doi: 10.1016/0030-4220(77)90417-0.
Two hundred seventy new files, reamers, and Hedström files from three different manufacturers were evaluated for debris and defects. Statistical analysis of the new instruments showed that one company's instruments were cleaner than the other two but still contained defects. A standard for quality is proposed.
对来自三个不同制造商的270根新锉、扩孔钻和Hedström锉进行了碎屑和缺陷评估。对新器械的统计分析表明，一家公司的器械比其他两家公司的更清洁，但仍存在缺陷。本文提出了质量标准。
