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Related Experiment Videos

A comparison of placement methods using a two-in-one dentin pin.

D L Healey1, N P Chandler

  • 1University of Otago, School of Dentistry, Dunedin, New Zealand.

The Journal of Prosthetic Dentistry
|December 1, 1991
PubMed
Summary

Standard handpieces and manual pin placement yielded the greatest retention for dental pins. Reduction handpieces offered the most consistent results, with all methods proving clinically acceptable for pin channel preparation.

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Area of Science:

  • Dental materials science
  • Biomaterials engineering
  • Prosthodontics

Background:

  • Dental post and core procedures are crucial for restoring endodontically treated teeth.
  • Effective retention of intraradicular posts is essential for long-term restoration success.
  • Various methods for post space preparation and post insertion exist, each with potential impacts on retention.

Purpose of the Study:

  • To evaluate the influence of different handpiece speeds and pin seating techniques on the retention of dental posts.
  • To compare the retentive strength achieved through standard versus reduction speed handpieces.
  • To assess the impact of manual versus motor-driven pin placement on post stability.

Main Methods:

  • Experimental investigation comparing post channel preparation using a standard handpiece (6000 rpm) and a reduction speed handpiece.

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  • Evaluation of pin seating techniques, including manual placement with a hand driver and motor-driven insertion.
  • Quantitative assessment of post retention for each preparation and placement combination.

    • Main Results:

    • The highest retention values were observed when using a standard handpiece at 6000 rpm combined with manual pin placement.
    • The reduction speed handpiece demonstrated the most consistent retention values across tested conditions.
    • All tested combinations of preparation and placement methods resulted in clinically acceptable outcomes.

    Conclusions:

    • Preparation with a standard handpiece at 6000 rpm and manual seating provides maximal post retention.
    • Reduction speed handpieces offer superior consistency in post retention.
    • All evaluated techniques are viable for clinical application, ensuring acceptable post stability.