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Related Experiment Videos

The adhesive amalgam--fact or fiction?

P E Temple-Smithson1, B E Causton, K F Marshall

  • 1Maurice Wohl GDP Centre, KCSMD, Camberwell, London.

British Dental Journal
|April 25, 1992
PubMed
Summary

Dental restorations using Amalgambond and Panavia-Ex showed advantages over pinned restorations, despite requiring technique sensitivity. These materials offer better outcomes, especially when the pulp is compromised.

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Area of Science:

  • Dental Materials Science
  • Restorative Dentistry
  • Biomaterials Engineering

Background:

  • Dental amalgam restorations are widely used but can be susceptible to dislodgement.
  • Retention of amalgam in non-retentive cavities often requires mechanical or chemical aids.
  • Evaluating new bonding agents is crucial for improving restoration longevity and predictability.

Purpose of the Study:

  • To compare the retentive strength and failure modes of amalgam restorations using different systems.
  • To assess the efficacy of Amalgambond and Panavia-Ex compared to traditional methods.
  • To investigate the influence of bonding agents on restoration integrity in compromised pulp situations.

Main Methods:

  • Forty molar and premolar teeth underwent cavity preparation and restoration with amalgam.
  • Restorations were placed using copal varnish (control), a mechanical pin, Amalgambond, or Panavia-Ex.
  • Dislodgement forces, energy, and failure modes were recorded and analyzed.

Main Results:

  • Pinned restorations exhibited significantly higher dislodgement forces.
  • Amalgambond and Panavia-Ex groups showed favorable failure modes and energy requirements, indicating enhanced retention.
  • Operator or technique sensitivity was noted for Amalgambond and Panavia-Ex due to film thickness.

Conclusions:

  • Amalgambond and Panavia-Ex offer significant advantages over pinned amalgam restorations, particularly in teeth with compromised pulps.
  • While pinned restorations are mechanically stronger, newer bonding agents provide better overall performance.
  • Technique sensitivity is a critical factor for successful application of Amalgambond and Panavia-Ex.

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