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[In vitro study of amalgam corrosion].

C Paganelli1, S Salgarello, M Mensi

  • 1Clinica Odontoiatrica, Università degli Studi di Brescia, p.le Spedali Civili 1, 25123 Brescia.

La Medicina Del Lavoro
|August 29, 2002
PubMed
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This study investigated dental alloy corrosion in various clinical settings. Localized corrosion, such as pitting and crevice corrosion, is more common than free surface corrosion in the oral cavity.

Area of Science:

  • Dental Materials Science
  • Corrosion Engineering
  • Biomaterials

Background:

  • Dental alloys are crucial for restorations, but their susceptibility to corrosion in the oral environment is a concern.
  • Understanding corrosion mechanisms is vital for improving the longevity and biocompatibility of dental materials.

Purpose of the Study:

  • To evaluate factors influencing dental alloy corrosion under diverse clinical conditions.
  • To assess the impact of different amalgam types and solution parameters on corrosion behavior.
  • To identify prevalent corrosion types in the oral cavity for dental alloys.

Main Methods:

  • Utilized a standardized 6-hole corrosion cell.
  • Adhered to the ASTM G5-95 protocol for corrosion testing.
  • Simulated various clinical conditions and solution parameters relevant to dental amalgams.

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Main Results:

  • Free surface corrosion is generally uncommon for most dental alloys in the oral cavity.
  • Localized corrosion, specifically pitting and crevice corrosion, is more likely to occur.
  • Clinical factors significantly influence amalgam corrosion, detectable through localized corrosion phenomena.

Conclusions:

  • Localized corrosion is a primary concern for dental alloys in vivo.
  • Cathodic/anodic surface behavior coupling plays a critical role in amalgam corrosion.
  • Further research into localized corrosion mechanisms can enhance dental restoration durability.