Corrosion of galvanic pairs of dental alloys copper base with silver amalgams in artificial saliva

Quezada-Castillo, Elvar; Aguilar-Castro, Wilder; Quezada-Alván, Bertha

doi:10.1590/s1517-707620190001.0636

Cited by 5 publications

(6 citation statements)

References 20 publications

(19 reference statements)

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“…Here, inhalation of Cu dust has led to a greenish stain on the teeth of the subject; this mechanism is also possible among musicians who use brass instruments, as dissolution and deposition of various metals may occur due to the close contact with the mucosa and the continuous soaking and maceration of the metal surfaces. The deposition of Cu may also give rise to oral galvanism (or galvanic shock), i.e., the occurrence of electric currents between the metals present in the oral cavity (e.g., from amalgam fillings, restorations) and the electrolytes in the saliva [ 27 , 28 ]. The extent of oral galvanism may be influenced by the restoration’s age, the total surface area of the galvanic couple, and the extent of the contamination [ 29 ].…”

Section: Discussionmentioning

confidence: 99%

Copper Accumulation in the Lips of Brass Players: Case Report of a Rare Phenomenon

et al. 2022

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Work-related exposures affecting oral health are important factors of morbidity and decreased quality of life, which may emerge from numerous physical, chemical, or mental occupational exposures. Copper (Cu) is an important trace element, however, it may also cause allergies, depose and accumulate in the body, leading to acute and chronic toxicity. In the present report, we describe a rare phenomenon found during the examination of two professional brass players, after incidentally noting an artefact during magnetic resonance imaging (MRI) scans, which were performed to monitor bone healing after bone augmentation procedures in an unrelated clinical study. During a detailed workup of patient characteristics, data on medical history, lifestyle, professional habits related to playing the instrument, and oral health status were collected. Overall, both patients presented with similar histories, and the differences from the context of this study were not relevant; however, both brass players were using an uncoated Cu mouthpiece for over 15 years. Based on the imaging findings (a shadow in the area of the lips on the MRI images) and the organoleptic evaluation of the lips and mucosa of the individuals (temporary faint green discoloration), it is most likely that the brass players were affected by oxidized Cu accumulation in the lip. In contrast to several professions, musicians are usually not required by law to attend obligatory occupational health check-ups, which may facilitate the occurrence of such exposures in musicians. Clinicians should be on the lookout for brass players involved in the profession for a long time, who may have used the mouthpieces for an extended period of time, in addition to musicians affected by Wilson’s disease. In patients affected by this phenomenon, diagnostics of oral cancer and prosthodontic procedures may be cumbersome, due to the detrimental impact on the utility of MRI imaging from artefact-formation and scattering.

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Section: Discussionmentioning

confidence: 99%

Copper Accumulation in the Lips of Brass Players: Case Report of a Rare Phenomenon

et al. 2022

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“…The peaks corresponding to K, Cl, P and Ca are due to the composition of the solution. Likewise, as it is not possible to detect oxygen and hydrogen by this method, it is expected that oxides and hydroxides are formed with these elements, iron and nickel phosphates and chlorides in minority form and probably copper thiocyanate [14]. The corrosion and EDAX products on the Ti-6Al-4V alloy are shown in Figure 12.…”

Section: Corrosion Productsmentioning

confidence: 99%

“…However, to further lower costs and allow access to dental prostheses to sectors of society with low resources and who cannot access the aforementioned alloys, copper based alloys such as Cu-Al, Cu-Ni appeared on the market and Cu-Zn, in the Latin American countries Brazil and Argentina and very little in the United States, as mentioned in international publications [8][9][10][11][12][13]. In recent years, research has been carried out on individual and combined non-precious dental alloys in order to evaluate their electrochemical behavior in solutions that simulate natural saliva [14][15][16][17][18][19]. However, it is necessary to carry out further studies and tests related to the release of metal ions from these alloys in the oral environment and the physiological effects they produce in users.…”

Section: Introductionmentioning

confidence: 99%

Ion release from non precious dental alloys in the oral cavity

2022

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Dental alloys in the oral cavity release ions by corrosive action of saliva, which are deposited in the lower part of the mouth, others diffuse through the gums and most of them pass to the gastrointestinal system. In the present work, nine dental alloys frequently used in our country by people with low resources (316L stainless steel, low and high copper silver amalgams, Co-Cr and Ni-Cr alloys, Cu and Ti-6Al-4V base alloys). Its open circuit corrosion potential was measured, its potentiodynamic polarization curves were plotted and corrosion products were analyzed by EDAX, finding Hg, Ag, Ni, Co, Cu, Zn and Si ions, which can affect the health of users, so it is recommended that dentists and dental technicians inform patients who suffer from hypersensitivity do not use alloys containing potentially allergic metals.

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“…According to many studies into the oral environment, the presence of chloride and fluorine can change the corrosion resistance of metals [5,[8][9][10][11]. Furthermore, pH variations, bacterial plaque biofilm, temperature disturbances, food intake, and implant micromovement, including other variables, can also reduce the corrosion resistance of these alloys [5,9,10].…”

Section: Introductionmentioning

confidence: 99%

“…As a result of this galvanic current, the less noble metal has its process corrosive increased. In addition, this electrical current flows through the tissues, causing pain and local inflammation [9,11,12].…”

Section: Introductionmentioning

confidence: 99%

Galvanic Corrosion of Ti Dental Implants Coupled to CoCrMo Prosthetic Component

Soares

Elias

Monteiro

et al. 2021

International Journal of Biomaterials

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Dental implant systems are composed of an implant, prosthetic components, and a crown. Since the implants are made of commercially pure Ti (cp Ti) and prosthetic components are often made of Ti and CoCrMo alloys, a galvanic couple between these two devices may lead to galvanic corrosion, ions release, and even loss of the implant. This study aimed to investigate the corrosion resistance and measure the galvanic potential between cp Ti alloys (annealed microstructured cp Ti G4 and cold-worked nanostructured cp Ti G4) and a CoCrMo alloy. The corrosion resistance has been characterized by measuring the open circuit potential, the potentiodynamic polarization, the potentiostatic polarization, and the zero-resistance current. The cp Ti has been tested before and after a surface acid treatment. The samples’ surfaces have been examined by scanning electron microscopy, and their surface roughness has been measured by a 3D optical profilometer. The polarization results showed that the CoCrMo alloy showed lower corrosion resistance than cp Ti. The surface acid treatment improves dental implant corrosion resistance. The galvanic analysis showed that the cp Ti without surface treatment behaved as an anode and after the acid treatment has a cathodic behavior in relation to the CrCoMo alloy. The highest value of galvanic current was cp TiG4 acid etched in contact with CoCrMo, in pH 2 solution. The galvanic couple with the lowest current has been the nanostructured cp Ti in contact with CoCrMo alloy.

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Corrosion of galvanic pairs of dental alloys copper base with silver amalgams in artificial saliva

Cited by 5 publications

References 20 publications

Copper Accumulation in the Lips of Brass Players: Case Report of a Rare Phenomenon

Copper Accumulation in the Lips of Brass Players: Case Report of a Rare Phenomenon

Ion release from non precious dental alloys in the oral cavity

Galvanic Corrosion of Ti Dental Implants Coupled to CoCrMo Prosthetic Component

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