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Ex vivo surface and mechanical properties of coated orthodontic archwires

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Ex vivo surface and mechanical properties of coated orthodontic archwires. / Elayyan, Firas; Silikas, Nick; Bearn, David (Lead / Corresponding author).

In: European Journal of Orthodontics, Vol. 30, No. 6, 12.2008, p. 661-667.

Research output: Contribution to journalArticle

Harvard

Elayyan, F, Silikas, N & Bearn, D 2008, 'Ex vivo surface and mechanical properties of coated orthodontic archwires' European Journal of Orthodontics, vol 30, no. 6, pp. 661-667. DOI: 10.1093/ejo/cjn057

APA

Elayyan, F., Silikas, N., & Bearn, D. (2008). Ex vivo surface and mechanical properties of coated orthodontic archwires. European Journal of Orthodontics, 30(6), 661-667. DOI: 10.1093/ejo/cjn057

Vancouver

Elayyan F, Silikas N, Bearn D. Ex vivo surface and mechanical properties of coated orthodontic archwires. European Journal of Orthodontics. 2008 Dec;30(6):661-667. Available from, DOI: 10.1093/ejo/cjn057

Author

Elayyan, Firas; Silikas, Nick; Bearn, David (Lead / Corresponding author) / Ex vivo surface and mechanical properties of coated orthodontic archwires.

In: European Journal of Orthodontics, Vol. 30, No. 6, 12.2008, p. 661-667.

Research output: Contribution to journalArticle

Bibtex - Download

@article{4a5d77cb370e4ef8a28a67132c09dc79,
title = "Ex vivo surface and mechanical properties of coated orthodontic archwires",
abstract = "This study examined the mechanical and physical properties of retrieved coated nickel-titanium (NiTi) archwires compared with unused samples. Ultraesthetic (TM) 0.016 inch coated archwires (G&H&REG; Wire Company) were investigated. Ten as-received wires were subjected to a three-point bending test using conventional and self-ligating bracket systems. Surface roughness of the coating was measured with a contact stylus profilometer. Optical and scanning electron microscopes were used to assess surface topography. Ten archwires were used in vivo for a period of between 4 and 6 weeks. Retrieved archwires were subjected to the same tests. The percentage of the remaining coating was calculated using digital photography. Coated archwires were used in vivo for a mean period of 33 days. Differences between the mean values of the as-received and retrieved archwires were determined using t-tests.In the three-point bending test, with conventional elastomeric ligation, retrieved wires produced a lower unloading force (P < 0.001). Both retrieved and as-received coated archwires produced zero values of unloading force when deflected for 4 mm. When tested using a self-ligating bracket system, retrieved and as-received coated archwires produced the same amount of force (P > 0.05). With surface profilometry, all measured roughness parameters (except R-sm) had greater surface roughness for the retrieved coated archwires (P < 0.05). Under microscopy, retrieved coated archwires showed discolouration, ditching, and delamination. Only 75 per cent of the coating was present in retrieved coated archwires.Retrieved coated archwires produced lower unloading force values than as-received coated archwires with conventional ligation. Surface roughness of coated archwires increased after use. Coated archwires have a low aesthetic value, with 25 per cent of the coating lost within 33 days in vivo.",
keywords = "Archwires, Roughness, Friction",
author = "Firas Elayyan and Nick Silikas and David Bearn",
year = "2008",
month = "12",
doi = "10.1093/ejo/cjn057",
volume = "30",
pages = "661--667",
journal = "European Journal of Orthodontics",
issn = "0141-5387",
publisher = "Oxford University Press",
number = "6",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Ex vivo surface and mechanical properties of coated orthodontic archwires

AU - Elayyan,Firas

AU - Silikas,Nick

AU - Bearn,David

PY - 2008/12

Y1 - 2008/12

N2 - This study examined the mechanical and physical properties of retrieved coated nickel-titanium (NiTi) archwires compared with unused samples. Ultraesthetic (TM) 0.016 inch coated archwires (G&H&REG; Wire Company) were investigated. Ten as-received wires were subjected to a three-point bending test using conventional and self-ligating bracket systems. Surface roughness of the coating was measured with a contact stylus profilometer. Optical and scanning electron microscopes were used to assess surface topography. Ten archwires were used in vivo for a period of between 4 and 6 weeks. Retrieved archwires were subjected to the same tests. The percentage of the remaining coating was calculated using digital photography. Coated archwires were used in vivo for a mean period of 33 days. Differences between the mean values of the as-received and retrieved archwires were determined using t-tests.In the three-point bending test, with conventional elastomeric ligation, retrieved wires produced a lower unloading force (P < 0.001). Both retrieved and as-received coated archwires produced zero values of unloading force when deflected for 4 mm. When tested using a self-ligating bracket system, retrieved and as-received coated archwires produced the same amount of force (P > 0.05). With surface profilometry, all measured roughness parameters (except R-sm) had greater surface roughness for the retrieved coated archwires (P < 0.05). Under microscopy, retrieved coated archwires showed discolouration, ditching, and delamination. Only 75 per cent of the coating was present in retrieved coated archwires.Retrieved coated archwires produced lower unloading force values than as-received coated archwires with conventional ligation. Surface roughness of coated archwires increased after use. Coated archwires have a low aesthetic value, with 25 per cent of the coating lost within 33 days in vivo.

AB - This study examined the mechanical and physical properties of retrieved coated nickel-titanium (NiTi) archwires compared with unused samples. Ultraesthetic (TM) 0.016 inch coated archwires (G&H&REG; Wire Company) were investigated. Ten as-received wires were subjected to a three-point bending test using conventional and self-ligating bracket systems. Surface roughness of the coating was measured with a contact stylus profilometer. Optical and scanning electron microscopes were used to assess surface topography. Ten archwires were used in vivo for a period of between 4 and 6 weeks. Retrieved archwires were subjected to the same tests. The percentage of the remaining coating was calculated using digital photography. Coated archwires were used in vivo for a mean period of 33 days. Differences between the mean values of the as-received and retrieved archwires were determined using t-tests.In the three-point bending test, with conventional elastomeric ligation, retrieved wires produced a lower unloading force (P < 0.001). Both retrieved and as-received coated archwires produced zero values of unloading force when deflected for 4 mm. When tested using a self-ligating bracket system, retrieved and as-received coated archwires produced the same amount of force (P > 0.05). With surface profilometry, all measured roughness parameters (except R-sm) had greater surface roughness for the retrieved coated archwires (P < 0.05). Under microscopy, retrieved coated archwires showed discolouration, ditching, and delamination. Only 75 per cent of the coating was present in retrieved coated archwires.Retrieved coated archwires produced lower unloading force values than as-received coated archwires with conventional ligation. Surface roughness of coated archwires increased after use. Coated archwires have a low aesthetic value, with 25 per cent of the coating lost within 33 days in vivo.

KW - Archwires

KW - Roughness

KW - Friction

UR - http://www.scopus.com/inward/record.url?scp=60049092681&partnerID=8YFLogxK

U2 - 10.1093/ejo/cjn057

DO - 10.1093/ejo/cjn057

M3 - Article

VL - 30

SP - 661

EP - 667

JO - European Journal of Orthodontics

T2 - European Journal of Orthodontics

JF - European Journal of Orthodontics

SN - 0141-5387

IS - 6

ER -

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