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Related Experiment Videos

Comparison of endodontic file tip quality.

K C Keate1, M Wong

  • 1U.S. Army Dental Activity, Fort Hood, TX.

Journal of Endodontics
|October 1, 1990
PubMed
Summary

Mallefer endodontic files exhibit superior tip angulation and manufacturing quality compared to Kerr files. File type also influences quality, with K-type and Flex-type showing better results than Hedstrom files.

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Area of Science:

  • Dental materials science
  • Biomaterials engineering
  • Manufacturing quality control

Background:

  • Endodontic files are critical instruments in root canal therapy.
  • Manufacturing quality and adherence to specifications are essential for predictable clinical outcomes.
  • Variations in file design and manufacturing processes may impact performance and safety.

Purpose of the Study:

  • To evaluate tip angulation and visual manufacturing characteristics of endodontic files.
  • To compare the quality of files from different manufacturers (Kerr and Mallefer).
  • To assess compliance with ANSI/ADA Specification Nos. 28 and 58 for tip angulation.

Main Methods:

  • One hundred eighty endodontic files (K-type, Hedstrom, Flex-type) from two manufacturers were examined.
  • Photomicrographs at 115x magnification were analyzed by two evaluators.
  • Tip angulation and four visual characteristics (symmetry, surface regularity, tip, and shoulder configuration) were assessed.
  • Chi-square statistical analysis was employed.

Main Results:

  • Mallefer files demonstrated better conformity to tip angle specifications and superior manufacturing quality compared to Kerr files.
  • Kerr Hedstrom files showed less compliance with tip angle specifications than Kerr K-type or K-Flex files.
  • K-type and Flex-type file tips were better manufactured than Hedstrom file tips.
  • Manufacturer certification status did not correlate with compliance or machining quality.

Conclusions:

  • Mallefer appears to be a higher-quality manufacturer regarding endodontic file tip angulation and overall manufacturing precision.
  • File design (K-type, Flex-type vs. Hedstrom) significantly impacts manufacturing quality.
  • Clinical performance implications of these manufacturing differences warrant further investigation.

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