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pubmed-article:7817958pubmed:abstractTextThe level of kinetic frictional forces generated during in vitro translation at the bracket-wire interface were measured for two sintered stainless steel brackets as a function of two slot sizes, four wire alloys, and five to eight wire sizes. The two types of sintered stainless steel brackets were tested in both 0.018-inch and 0.022-inch slots. Wires of four different alloy types, stainless steel (SS), cobalt chromium (Co-Cr), nickel-titanium (Ni-Ti), and beta-titanium (beta-Ti), were tested. There were five wire sizes for the 0.018-inch slot and eight wire sizes for the 0.022-inch slot. The wires were ligated into the brackets with elastomeric ligatures. Bracket movement along the wire was implemented by means of a mechanical testing instrument, and time dependent frictional forces were measured by a load cell and plotted on an X-Y recorder. For most wire sizes, lower frictional forces were generated with the SS of Co-Cr wires than with the beta-Ti or Ni-Ti wires. Increase in wire size generally resulted in increased bracket-wire friction. There were no significant differences between manufacturer for the sintered stainless steel brackets. The levels of frictional force in 0.018-inch brackets ranged from a low of 46 gm with 0.016-inch Co-Cr wire to a high of 157 gm with 0.016 x 0.025-inch beta-Ti wire. In comparing the data from a previous study by Kapila et al. 1990 performed at OUHSC with the same apparatus, the friction of sintered stainless steel brackets was approximately 40% to 45% less than the friction of the conventional stainless steel brackets.lld:pubmed
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pubmed-article:7817958pubmed:pagination20-7lld:pubmed
pubmed-article:7817958pubmed:dateRevised2008-11-21lld:pubmed
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pubmed-article:7817958pubmed:year1995lld:pubmed
pubmed-article:7817958pubmed:articleTitleRelative kinetic frictional forces between sintered stainless steel brackets and orthodontic wires.lld:pubmed
pubmed-article:7817958pubmed:affiliationDepartment of Orthodontics, University of Oklahoma, College of Dentistry, Oklahoma City.lld:pubmed
pubmed-article:7817958pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:7817958pubmed:publicationTypeComparative Studylld:pubmed