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Related Experiment Videos

Time analysis for screw application: traditional lag technique versus self-tapping lag technique

J V Gonzalez1, B M Trout, R M Stuck

  • 1Department of Orthopaedic Surgery, Loyola Medical Center, Maywood, IL, USA.

The Journal of Foot and Ankle Surgery : Official Publication of the American College of Foot and Ankle Surgeons
|January 16, 1998
PubMed
Summary

This study compared surgical screw insertion times. A self-tapping lag screw significantly reduced procedural time compared to a traditional cortical screw, irrespective of surgeon experience.

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Area of Science:

  • Orthopedic surgery
  • Biomedical engineering
  • Podiatric medicine

Background:

  • Traditional cortical screws require overdrilling and tapping, potentially increasing procedural time.
  • Self-tapping lag screws are designed to simplify insertion by eliminating these steps.

Purpose of the Study:

  • To compare the procedural time of a 2.7-mm fully threaded cortical screw versus a 2.4-mm self-tapping lag screw.
  • To evaluate the impact of physician experience on screw insertion time.

Main Methods:

  • Four board-certified physicians and four residents performed screw insertions.
  • Screws were placed through two 8-mm layers of Last-a-foam.
  • Participants were timed over four weekly sessions, with four screws of each type placed per week.

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Main Results:

  • A statistically significant difference in insertion time was observed between the two screw types.
  • The self-tapping lag screw demonstrated shorter procedural times compared to the cortical screw.
  • Physician experience did not significantly alter the observed time differences.

Conclusions:

  • The self-tapping lag screw offers a more time-efficient alternative to traditional cortical screws.
  • This finding holds true across varying levels of physician experience.
  • The results suggest potential benefits for operative efficiency in orthopedic and podiatric procedures.