Corrosion of orthodontic bracket bases

Maijer, R.; Smith, Dennis C.

doi:10.1016/0002-9416(82)90287-1

Cited by 113 publications

(79 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Most orthodontic brackets are made of austenitic stainless steel, which forms chrome-carbide compounds that precipitate at temperatures between 600 o C and 800 o C. This process leads to disintegration of the metal alloy and weakens its structure. In addition to chromium loss via carbide precipitation, corrosion strength also decreases (9). The recycling process is concluded by electrochemical polishing of the brackets to eliminate irregularities or excessive surface roughness and prevent the trend to opacity or corrosion resulting from the process.…”

Section: Braz Dent J (2006) 17(1): 44-48mentioning

confidence: 99%

Shear bond strength of new and recycled brackets to enamel

et al. 2006

View full text Add to dashboard Cite

The purpose of this study was to evaluate in vitro the shear bond strength of recycled orthodontic brackets. S2C-03Z brackets (Dental Morelli, Brazil) were bonded to the buccal surfaces of 50 extracted human premolars using Concise Orthodontic chemically cured composite resin (3M, USA). The teeth were randomly assigned to 5 groups (n=10), as follows. In group I (control), the bonded brackets remained attached until shear testing (i.e., no debonding/rebonding). In groups II, III and IV, the bonded brackets were detached and rebonded after recycling by 90-μm particle aluminum oxide blasting, silicon carbide stone grinding or an industrial process at a specialized contractor company (Abzil-Lancer, Brazil), respectively. In group V, the bonded brackets were removed and new brackets were bonded to the enamel surface. Shear bond strength was tested in an Instron machine at a crosshead speed of 0.5 mm/min. Data were analyzed statistically by ANOVA and Tukey's test at 5% significance level. There was no statistically significant difference (p>0.05) between the control brackets (0.52 kgf/mm 2 ), brackets recycled by aluminum oxide blasting (0.34 kgf/mm 2 ) and new brackets attached to previously bonded teeth (0.43 kgf/mm 2 ). Brackets recycled by the specialized company (0.28 kgf/mm 2 ) and those recycled by silicon carbide stone grinding (0.14 kgf/mm 2 ) showed the lowest shear strength means and differed statistically from control brackets (0.52 kgf/ mm 2 ) (p<0.05). In conclusion, the outcomes of this study showed that bracket recycling using 90-μm aluminum oxide particle airabrasion was efficient and technically simple, and might provide cost reduction for orthodontists and patients alike.

show abstract

Section: Braz Dent J (2006) 17(1): 44-48mentioning

confidence: 99%

Shear bond strength of new and recycled brackets to enamel

et al. 2006

View full text Add to dashboard Cite

show abstract

“…It was not until the introduction and continuing development of enamel etching [42], biocompatible metals [43], and biomechanical concepts [44] that active mobilization of impacted teeth (especially group by group) became possible. In addition, the precision of radiographic diagnosis had been enhanced by the introduction and ongoing improvement of three-dimensional imaging techniques [45], creating better conditions for selective mobilization of teeth [46].…”

Section: Discussionmentioning

confidence: 99%

A Simultaneous Mobilization Of Four Impacted Upper Incisors In A Case Of An Adolescent Patient With Cleidocranial Dysplasia (CCD)

Te¹,

Kj²,

Yc³

et al. 2014

Dentistry

View full text Add to dashboard Cite

Introduction: Cleidocranial dysplasia (CCD) is often attended by a considerable number of supernumerary teeth combined with impaction of sometimes all permanent teeth. To help these patients obtain an esthetically pleasing and functional dentition, eruption of an appropriate number of permanent teeth should ideally be brought about, while all other teeth should be removed. The simultaneous traction of several neighboring teeth into the same direction is associated with biomechanical challenges. This report illustrates how these difficulties were solved in a specific treatment case.

show abstract

“…4,6,9,[16][17][18] However, there were no in vitro studies proving the incorporation of these metals into tooth enamel. A search for articles published until the second week of September 2011 in all languages was performed in the Ovid, VHL, Scopus, and PubMed databases.…”

Section: Discussionmentioning

confidence: 99%

“…5,6 In patients with poor oral hygiene, there is frequently plaque accumulation on the vestibular surface of teeth, around the brackets, leading to a process of enamel demineralization. 7,8 In these cases, the presence of acidogenic microorganisms also favors biodegradation of the brackets, with the consequent release of metal ions 9 that may be incorporated into the tooth enamel during a possible remineralization cycle.…”

Section: Introductionmentioning

confidence: 99%

Incorporation of metal and color alteration of enamel in the presence of orthodontic appliances

Maia

Filho

Araújo

et al. 2012

The Angle Orthodontist

View full text Add to dashboard Cite

Objective: To test the null hypothesis that it is not possible to incorporate metal ions arising from orthodontic appliance corrosion into tooth enamel with resulting tooth color change. Materials and Methods: This in vitro study used atomic absorption spectrophotometry to evaluate the presence of nickel, chromium, and iron ions in tooth enamel in three groups: a group submitted to cyclic demineralization and remineralization processes with solutions in which orthodontic appliances were previously immersed and corroded, releasing metallic ions; a control group; and another group, submitted to cycling only, without the presence of orthodontic appliances. The influence of the incorporation of these metals on a possible alteration in color was measured with a portable digital spectrophotometer using the CIE LAB system. Results: At the end of the experiment, a significantly higher concentration of chromium and nickel (P , .05) was found in the group in which corrosion was present, and in this group, there was significantly greater color alteration (P # .001).Conclusions: There was chromium and nickel incorporation into enamel and tooth color change when corrosion of orthodontic appliances was associated with cycling process. The null hypothesis is rejected. (Angle Orthod. 2012;82:889-893.)

show abstract

Corrosion of orthodontic bracket bases

Cited by 113 publications

References 10 publications

Shear bond strength of new and recycled brackets to enamel

Shear bond strength of new and recycled brackets to enamel

A Simultaneous Mobilization Of Four Impacted Upper Incisors In A Case Of An Adolescent Patient With Cleidocranial Dysplasia (CCD)

Incorporation of metal and color alteration of enamel in the presence of orthodontic appliances

Contact Info

Product

Resources

About