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Related Experiment Videos

Retrieval of silver cones using different techniques.

M Hülsmann1

  • 1Department of Operative Dentistry, University of Gottingen, Federal Republic of Germany.

International Endodontic Journal
|November 1, 1990
PubMed
Summary
This summary is machine-generated.

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Hand instruments effectively retrieved over half of silver cones. Specialized tools like the Canal-Finder-System and ultrasonic devices aided in difficult cases but did not guarantee complete silver cone removal.

Area of Science:

  • Endodontics
  • Dental Materials Science

Background:

  • Silver cones were historically used as root canal filling materials.
  • Challenges exist in removing intact or fractured silver cones from root canals.
  • Effective retrieval techniques are crucial for successful endodontic retreatment.

Purpose of the Study:

  • To compare the efficacy of three different techniques for silver cone retrieval.
  • To evaluate hand instrumentation, the Canal-Finder-System, and ultrasonic devices for silver cone removal.

Main Methods:

  • A sequential retrieval approach was used on 91 silver cones in 41 teeth.
  • Techniques included hand instrumentation (files, spoon excavators, forceps), the Canal-Finder-System, and ultrasonic devices.
  • The sequence of application was consistent: hand instruments, then Canal-Finder-System, followed by ultrasonics.

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Main Results:

  • Hand instruments successfully removed 57% (52/91) of silver cones.
  • The Canal-Finder-System retrieved 21% (19/39) of the remaining cones.
  • Ultrasonic devices removed an additional 11% (10/39) of the remaining cones.
  • 9% (8/91) of cones were neither bypassed nor removed.

Conclusions:

  • Silver cone retrieval is often achievable with basic hand instruments, especially spoon excavators.
  • The Canal-Finder-System and ultrasonic devices are valuable adjuncts for challenging retrievals.
  • No single technique guarantees complete silver cone removal in all instances.