EFFECT OF BRACKET AND WIRE COMPOSITION ON FRICTIONAL FORCES

被引：73

作者：

IRELAND, AJ

SHERRIFF, M

MCDONALD, F

机构：

[1] Departments of Orthodontics, UMDS, London, Guy's Campus

[2] Departments of Dental Materials Science, UMDS, London, Guy's Campus

来源：

EUROPEAN JOURNAL OF ORTHODONTICS | 1991年 / 13卷 / 04期

关键词：

D O I：

10.1093/ejo/13.4.322

中图分类号：

R78 [口腔科学];

学科分类号：

1003 ;

摘要：

Previous work on friction has considered movement of single teeth along an archwire. The aim of this investigation was to consider friction in buccal segment attachments during overjet reduction involving sliding mechanics. A buccal segment model was constructed to compare friction in steel and ceramic brackets, using steel and nickel titanium wires of two sizes along with a new experimental polymeric wire. The results indicate that friction during overjet reduction is minimized by using larger dimension rectangular wires and by using steel rather than nickel titanium. Comparing steel with ceramic brackets in series, the latter show greater frictional resistance, but only when used with the smaller rectangular wires. The combined effect of environment, ligation, bracket, and archwire significantly reduced the difference. Clinically, there may, therefore, be little to choose between steel and ceramic brackets in the buccal segments, with wire choice as determined by tooth displacement being more important. Comparison of the results with those obtained using single brackets illustrates the problems of interpreting results from friction experiments. The polymeric archwire in its present form was found to be unsuitable for use in orthodontics.

引用

页码：322 / 328

页数：7

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