The aim of the study is to evaluate the corrosion resistance of the indigenously fabricated dental magnet.

The Teflon-encased Neodymium-Iron-Boron (Nd–Fe–B) magnet was put to test to comply with the standardized conditions. The corrosion behavior was examined using the statistical immersion analysis according to the International Organization for Standardization (ISO) 10271:2001: “Dental metallic materials corrosion test methods.” In this method, the maximum ion release after 7 days was evaluated. The test specimen (magnet) was dipped in corrosive solution for 7 days in polypropylene test tube. Both the control and test magnets were dipped in artificial saliva. The pH of artificial saliva was adjusted to 6.75. After 7 days, the eluate solution was subjected to inductively coupled plasma spectroscopy evaluation to trace the amount of metal ions leached out from the magnets.

The mean values for Nd, Fe, and B were 329, 532, and 316 µg/cm² respectively. According to the ISO standards, the tested product values of ions leached out should be within the value of 200 µg/cm². The release of corrosion products stayed significantly under the limit as specified by the ISO standard 22674:2006 for all the specimens in the test groups.

Within the limitations of the study, the indigenously fabricated dental magnet had negligible corrosion in comparison with the control group.

Magnetic attachments have most commonly been used for the retention of mandibular overdentures. Patients with magnet-retained overdentures have reported a high degree of satisfaction with their dentures. Due to the lack of indigenous fabrication and high costs of imported magnet has led to restricted use of magnets in developing countries. Indigenously developed dental magnets can reduce the cost and make them affordable to our native population. The abutment-friendly benefits of magnetic attachment will help retain the removable prostheses effectively.

Guttal SS, Nadiger RK. Corrosion Resistance of indigenously Fabricated Dental Magnets for Application in Prosthodontics. Int J Prosthodont Restor Dent 2017;7(2):48-52.