Abstract:

BACKGROUND: After long-term exposure to oral complex environments, magnetic attachment keepers may corrode slowly, affected by various factors.
OBJECTIVE: To review the research methods and influencing factors related to corrosion resistance of magnetic attachment keepers.
METHODS: The first author retrieved Ovid, ScienceDirect (2001-01/2011-12) and CNKI (2003-01/2011-12) for articles addressing magnetic attachment, keeper corrosion resistance and corrosion resistance of dental metals. The key words were “magnetic attachment or keeper or dental metal, corrosion or anticorrosion” and “magnetic attachment, keeper, dental alloy, corrosion” in English and Chinese, respectively. Repetitive studies and Meta analysis were excluded, and finally 30 articles were included.
RESULTS AND CONCLUSION: Corrosion electrochemical experiments and the surface morphology are common research methods, and corrosion-gel method can be used as a new user-friendly detection method for horizontal comparative study. The microelectrode technique and the Kelvin probe technology many after all be accepted as a new method of minor localized corrosion. Application forms, the alloy composition of the root cap and keeper itself, production process, whether to add a protective coating as well as the patient’s oral condition can affect the corrosion of the keeper in the oral cavity. However, the current studies are just focused on the keeper itself, and no research pays attention to the corrosion resistance of the composite structure of the keeper-root-cap that should be more explored.