Corrosion of silver soldered orthodontic wires

Berge, Morten; Gjerdet, Nils Roar; Erichsen, Egil S.

doi:10.3109/00016358209041118

Cited by 45 publications

(29 citation statements)

References 3 publications

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“…• The workpiece must be cooled down gradually to avoid mechanical stresses and crystallization defects resulting from differing thermal expansion coefficients of wire and solder [22]. • The surfaces must be carefully polished after the soldering process, since pores, inhomogeneities and poorly trimmed surfaces encourage susceptibility to corrosion [2,5,6]. • Prior to insertion of an orthodontic appliance, the dental technician should control the quality of each solder joint according to the criteria set out above and repair or replace any displaying defective solders.…”

Section: Discussionmentioning

confidence: 99%

“…The quality of a solder joint depends on its mechanical stability [12,20,31,32], the degree of contact [8], the alloying properties of the materials to be soldered [11,22,31,32], the extent of entrapments and holes in the soldering area [1,8,31,32], and corrosion resistance [2,8]. It has frequently been shown that silver solder connections of steel alloys are susceptible to corrosion due to galvanic reactions and overheating [2,6,9,25,29]. Besides undesirable functional impairment, corrosion products may give rise to biological effects [15,16,26], although the extent of clinically relevant damage to health is as yet largely unknown [10].…”

Section: Introduction and Issuementioning

confidence: 99%

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Orthodontic Soldering Techniques: Aspects of Quality Assurance in the Dental Laboratory

Heidemann¹,

Witt²,

Feeg³

et al. 2002

Journal of Orofacial Orthopedics/Fortschritte der Kieferorthop�

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Section: Discussionmentioning

confidence: 99%

Section: Introduction and Issuementioning

confidence: 99%

Orthodontic Soldering Techniques: Aspects of Quality Assurance in the Dental Laboratory

Heidemann¹,

Witt²,

Feeg³

et al. 2002

Journal of Orofacial Orthopedics/Fortschritte der Kieferorthop�

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show abstract

“…Silver soldering has been shown to increase nickel release from stainless steel arch wires. 13 The RME appliance, because it is made of stainless steel and includes several silversoldering seams, may have leaked nickel to an extent that exceeded the individual threshold of our patient. Whether the allergic reaction would have occurred similarly to that seen with standard fixed appliances can only be speculated upon.…”

Section: Discussionmentioning

confidence: 99%

Face and Neck Dermatitis from a Stainless Steel Orthodontic Appliance

Ehrnrooth

Kerosuo

2009

The Angle Orthodontist

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Although nickel is the most common cause of contact allergy, nickel-containing orthodontic appliances seldom cause adverse reactions that result in discontinuation of treatment. We report on an eruption of dermatitis in the face and neck of an adult female patient after placement of a rapid maxillary expansion appliance (RME). Because the patient suspected nickel allergy, her tolerance to the appliance material was tested intraorally before treatment by cementing bands on four teeth for a week. No visible adverse reactions were seen during the test. One week after cementation of the RME appliance, the patient reported strong itching of the face and a red rash. Clinical examination showed itchy papular erythema on the face and neck. No intraoral reactions or symptoms were present. The RME appliance was removed, and symptoms disappeared in 4 to 5 days. The patient was referred for a nickel patch test, which gave a strong positive result. Adverse patient reactions of potential allergic origin should be diagnosed carefully, and their possible impact on further treatment should be evaluated accordingly.

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“…6 However, even though the brackets in group B are fabricated with a more resistant alloy, they present a welded area between the body and base of the brackets, which tends to increase susceptibility to corrosion. 3,19,21,24 Comparisons with in vitro studies are necessary, yet limited, because of variations in methodology. The first variable is the immersion solution; the most often solutions used are 0.05% or 0.9% saline solution or artificial saliva with different compositions.…”

Section: Discussionmentioning

confidence: 99%

Nickel, Chromium and Iron Levels in the Saliva of Patients with Simulated Fixed Orthodontic Appliances

Souza

Menezes

2008

The Angle Orthodontist

106

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Objective: To assess the in vivo release of nickel, chromium, and iron ions into saliva by different metallic brackets. Materials and Methods: Thirty volunteers wore removable appliances with bonded brackets and were divided according to the brand of brackets: group A, 3M/Unitek (AISI 303); group B, American Orthodontics (AISI 316L); and group C, Dentaurum (AISI 316L). The appliances were worn for 60 days, and saliva samples were collected at the following time points: T1, before placement of the appliance; T2, after 10 minutes; T3, 24 hours; T4, 7 days; T5, 30 days; and T6, 60 days after insertion of the removable appliance. Saliva samples were analyzed for nickel, chromium, and iron by atomic absorption spectrophotometry. Statistical analysis was performed by nonparametric tests (Friedman, Mann-Whitney, Kruskal-Wallis). Results: Saliva evaluation revealed a large variation in concentration of these ions between individuals. The results also appeared to indicate an increase in nickel and chromium ions immediately after placement of the appliance (T2), but this was statistically significant only for groups B and C. There was no increase in iron levels. A tendency for increases in nickel and chromium concentrations was verified immediately after placement of the appliance, but these values are probably reduced because of biofilm formation regardless of the bracket used. Conclusion: Nickel and chromium ion concentrations increased immediately after placement of the appliance in the mouth for all study groups. There were no significant differences in the nickel, chromium, and iron levels released by the three groups of appliances at all study periods.

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Corrosion of silver soldered orthodontic wires

Cited by 45 publications

References 3 publications

Orthodontic Soldering Techniques: Aspects of Quality Assurance in the Dental Laboratory

Orthodontic Soldering Techniques: Aspects of Quality Assurance in the Dental Laboratory

Face and Neck Dermatitis from a Stainless Steel Orthodontic Appliance

Nickel, Chromium and Iron Levels in the Saliva of Patients with Simulated Fixed Orthodontic Appliances

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