An investigation into the mechanical and aesthetic properties of new generation coated nickel-titanium wires in the as-received state and after clinical use.

Bradley, T Gerard; Berzins, David W; Valeri, Nicholas; Pruszynski, Jessica; Eliades, Theodore; Katsaros, Christos (2014). An investigation into the mechanical and aesthetic properties of new generation coated nickel-titanium wires in the as-received state and after clinical use. European journal of orthodontics, 36(3), pp. 290-296. Oxford University Press 10.1093/ejo/cjt048

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BACKGROUND/OBJECTIVES The purpose of this study was to compare the mechanical, structural, and aesthetic properties of two types of aesthetic coated nickel-titanium (NiTi) wires compared with comparable regular NiTi wires in the as-received state and after clinical use. MATERIALS/METHODS Sixty one subjects were randomly assigned to four groups (N = 61), two groups of coated wires and two groups of comparable, non-coated controls (n = 15/group). The period in the mouth ranged from 4 to 12 weeks after insertion. In total, 121 wires (61 retrieved and 60 as-received) were used in the study. The percentages of coating retention and loss were extrapolated from scans. A brief survey of five questions with three choices was given to all patients. Differential scanning calorimetry (DSC) and three-point bending tests were done on as-received and used wires. RESULTS The surface characterization by the percentage of resin remaining indicated that most wires in both test groups lost a significant amount of coating. A patient survey indicated that this was a noticeable feature for patients. DSC analysis of the wires indicated that the metallurgical properties of the coated wires were not similar to the uncoated wires in the as-received condition. Three-point bending results indicate a wide variation in test results with large standard deviations among all the groups. LIMITATIONS The extent of coating loss requires investigating, as do the biological properties of the detached coating. CONCLUSIONS Both wires lost a significant amount of aesthetic coating after varying periods in the mouth. The metallurgical testing of these findings may indicate that these wires perform differently in the mouth.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > School of Dental Medicine > Department of Orthodontics

UniBE Contributor:

Katsaros, Christos

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0141-5387

Publisher:

Oxford University Press

Language:

English

Submitter:

Eveline Carmen Schuler

Date Deposited:

25 Nov 2014 15:01

Last Modified:

27 Apr 2018 11:02

Publisher DOI:

10.1093/ejo/cjt048

PubMed ID:

23873791

BORIS DOI:

10.7892/boris.60577

URI:

https://boris.unibe.ch/id/eprint/60577

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