Can laser welding stop corrosion of new generation magnetic attachment systems?

Akın, Hakan; Çoşkun, Mehmet; Topcuoglu, Tolga; Özdemir, Ali Kemal

doi:10.1179/143307511x12922272563987

Cited by 7 publications

(9 citation statements)

References 20 publications

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“…In addition, 72 hours, 7 days, 28 days, 42 days, and 60 days of immersion period have been performed. Furthermore, magnets have been immersed in corrosive environments for 14 days to determine corrosion performance of laser‐welded new generation magnets . Therefore, in this study, an immersion period of 14 days was used.…”

Section: Discussionsupporting

confidence: 59%

“…The pH of human saliva is 6.2 to 7.6, and the pH of foods and beverages can range from 2.0 to 11.0 . In the literature, although lactic acid, and NaCl solutions are usually selected as corrosive media, there is no consensus for the length of the immersion period. Noar et al evaluated corrosion performance of the magnets from 1 to 7 hour immersion periods.…”

Section: Discussionmentioning

confidence: 99%

“…By using Nd:YAG laser under argon atmosphere, a shield ring made of stainless steel (SUS 447J1 or SUS 316L) or titanium is welded in the boundary between the cup and disc yokes in the laser‐welding technique . Consistent with the results of Boeckler et al and Akin et al, corrosion is not completely stopped despite laser welding. The laser‐welding zone broke down, and corrosion reached the magnet.…”

Section: Discussionmentioning

confidence: 99%

“…Several studies, including retention properties, cytotoxicity tests, and corrosion tests, have been conducted ,. Nevertheless, no solid data about magnetic flux density exists regarding a magnetic attachment.…”

mentioning

confidence: 99%

“…3,11 Several studies, including retention properties, cytotoxicity tests, and corrosion tests, have been conducted. 2,7,8,[13][14][15] Nevertheless, no solid data about magnetic flux density exists regarding a magnetic attachment. Therefore, the purpose of this study was to analyze the static magnetic flux density of different types of new generation magnetic attachments in the single position and the attractive position and to determine the effect of two corrosive environments on magnetic flux density.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Magnetic Flux Density of Different Types of New Generation Magnetic Attachment Systems

Akin

2014

Journal of Prosthodontics

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Section: Discussionsupporting

confidence: 59%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Magnetic Flux Density of Different Types of New Generation Magnetic Attachment Systems

Akin

2014

Journal of Prosthodontics

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Effect of corrosive environments and thermocycling on the attractive force of four types of dental magnetic attachments

Akin¹,

Özdemir²

2013

Journal of Dental Sciences

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Corrosion behaviours of the dental magnetic keeper complexes made by different alloys and methods

Song

Liu

et al. 2016

Int J Oral Sci

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The keeper and cast dowel–coping, as a primary component for a magnetic attachment, is easily subjected to corrosion in a wet environment, such as the oral cavity, which contains electrolyte-rich saliva, complex microflora and chewing behaviour and so on. The objective of this in vitro study was to examine the corrosion resistance of a dowel and coping-keeper complex fabricated by finish keeper and three alloys (cobalt–chromium, CoCr; silver–palladium–gold, PdAu; gold–platinum, AuPt) using a laser-welding process and a casting technique. The surface morphology characteristics and microstructures of the samples were examined by means of metallographic microscope and scanning electron microscope (SEM). Energy-dispersive spectroscopy (EDS) with SEM provided elements analysis information for the test samples after 10% oxalic acid solution etching test. Tafel polarization curve recordings demonstrated parameter values indicating corrosion of the samples when subjected to electrochemical testing. This study has suggested that massive oxides are attached to the surface of the CoCr–keeper complex but not to the AuPt–keeper complex. Only the keeper area of cast CoCr–keeper complex displayed obvious intergranular corrosion and changes in the Fe and Co elements. Both cast and laser-welded AuPt–keeper complexes had the highest free corrosion potential, followed by the PdAu–keeper complex. We concluded that although the corrosion resistance of the CoCr–keeper complex was worst, the keeper surface passive film was actually preserved to its maximum extent. The laser-welded CoCr– and PdAu–keeper complexes possessed superior corrosion resistance as compared with their cast specimens, but no significant difference was found between the cast and laser-welded AuPt–keeper complexes. The Fe-poor and Cr-rich band, appearing on the edge of the keeper when casting, has been proven to be a corrosion-prone area.

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Can laser welding stop corrosion of new generation magnetic attachment systems?

Cited by 7 publications

References 20 publications

Magnetic Flux Density of Different Types of New Generation Magnetic Attachment Systems

Magnetic Flux Density of Different Types of New Generation Magnetic Attachment Systems

Effect of corrosive environments and thermocycling on the attractive force of four types of dental magnetic attachments

Corrosion behaviours of the dental magnetic keeper complexes made by different alloys and methods

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