The effects of sodium fluoride and stannous fluoride on the surface roughness of intraoral magnet systems

Obatake, Robert M.; Collard, Stephen M.; Martin, Jack W.; Ladd, G. David

doi:10.1016/0022-3913(91)90522-x

Cited by 9 publications

(3 citation statements)

References 8 publications

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“…An overdenture with a magnetic attachment has many advantages, such as resistance of the denture to detachment, high esthetics, and a low burden on the teeth. Magnetic attachments are useful not only in prosthodontics but also for maxillofacial prosthetics (3,(13)(14)(15)(16)(17)(18)(19). Despite several case reports on the use of magnetic attachments, the influence of permanent magnets on living cells remains unclear.…”

Section: Discussionmentioning

confidence: 99%

A static magnetic field inhibits the expression of platelet-derived growth factor-AA in human oral squamous cell carcinoma

et al. 2018

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Magnetic attachments are commonly used for overdentures. The deleterious effects of exposure to magnetic flux on human health have not been substantiated so far; nevertheless, there is a need to understand the extent of magnetic field exposure in the oral area resulting from the use of magnetic attachments. The purpose of this study was to investigate the influence of a magnetic field on oral squamous cell carcinoma. Tumor cells cultured on a magnetic plate were compared with those not cultured on a magnetic plate (controls). The cells were seeded at a density of 1 × 10 cells/well and cultured for 6 days. The influence of the magnetic field on cytokine production was examined by cytokine array analysis. Secretion of platelet-derived growth factor-AA (PDGF-AA) was measured by enzyme-linked immunosorbent assay and Western blotting. The expression of PDGF-AA messenger RNA was examined by real-time polymerase chain reaction, whereas nuclear factor-kappa B activity was measured by luciferase assay. The results indicated that the magnetic field inhibited the secretion of PDGF-AA, thereby inhibiting PDGF-AA-induced expression, thus reducing the risk of cancer recurrence.

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Section: Discussionmentioning

confidence: 99%

A static magnetic field inhibits the expression of platelet-derived growth factor-AA in human oral squamous cell carcinoma

et al. 2018

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“…For example, corrosion was analyzed visually by examining the surface of the specimen, by determining the surface roughness and the loss of weight, or by indirect, electrochemical measurement of the electron flow and the release of elements. 13,14 Other authors used changes in the magnetic flux density or in the retention force for determining the amount of corrosion. 15,16 Added option is the direct, quantitative measurement and identification of released elements with the help of different analytical methods.…”

Section: Discussionmentioning

confidence: 99%

Corrosion Resistance of indigenously Fabricated Dental Magnets for Application in Prosthodontics

Nadiger¹,

Guttal²

2017

International Journal of Prosthodontics and Restorative Dentistry

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Aim: The aim of the study is to evaluate the corrosion resistance of the indigenously fabricated dental magnet. Materials and methods: 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. Results: The mean values for Nd, Fe, and B were 329, 532, and 316 µg/cm 2 respectively. According to the ISO standards, the tested product values of ions leached out should be within the value of 200 µg/cm 2. 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. Conclusion: Within the limitations of the study, the indigenously fabricated dental magnet had negligible corrosion in comparison with the control group. Clinical significance: 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 abutmentfriendly benefits of magnetic attachment will help retain the removable prostheses effectively.

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“…In the past, metallic corrosion was tested in different ways. For example, corrosion was analyzed visually by examining the surface of the specimen, by determining the surface roughness and the loss of weight, or by indirect, electrochemical measurement of the electron flow and the release of elements 19–22 . Other authors used changes in the magnetic flux density or in the retention force for determining the amount of corrosion 23,24 .…”

mentioning

confidence: 99%

Corrosion of Dental Magnet Attachments for Removable Prostheses on Teeth and Implants

Boeckler¹,

Ehring²,

Morton³

et al. 2009

Journal of Prosthodontics

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The analysis of the corrosion behavior of modern magnetic attachments for use on teeth and dental implants according to ISO 10271:2001 showed that metal ions had dissolved on all specimens. In the case of one product, the magnet corroded. For this product, an improvement of the capsulation would be desirable. None of the products reached the limit specified in ISO 22674:2006. All products seem to be suitable for dental application. Further studies in regard to the specific biocompatibility and possible cytotoxic effects on mucosa and tissue would be desirable.

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The effects of sodium fluoride and stannous fluoride on the surface roughness of intraoral magnet systems

Cited by 9 publications

References 8 publications

A static magnetic field inhibits the expression of platelet-derived growth factor-AA in human oral squamous cell carcinoma

A static magnetic field inhibits the expression of platelet-derived growth factor-AA in human oral squamous cell carcinoma

Corrosion Resistance of indigenously Fabricated Dental Magnets for Application in Prosthodontics

Corrosion of Dental Magnet Attachments for Removable Prostheses on Teeth and Implants

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