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Journal of Dental Specialities


Effect of pre-stretching of surgical stainless steel wires on their ultimate load bearing strength - a prospective study


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Author Details: Pankaj Kukreja, Mohit Mangla, Lily Rajput, Kumar Rakshak Anand, Sanjeev Kumar, Heena Agarwal

Volume : 4

Issue : 1

Online ISSN : 2393-9834

Print ISSN : 2320-7302

Article First Page : 36

Article End Page : 38


Abstract

Aim: To evaluate the effect of different percentage elongations on the ultimate tensile strength of 24 and 26 gauge stainless steel wires.
Materials and Methods: 5 sets of wires were taken from a single spool of 26 gauge and 24 gauge obtained from a single manufacturer. They were pre-stretched to different percentages of 0%, 2.5%, 5%, 7.5%, 10% and 12.5%. The wires were cut to a standard length of 20 cm each and were subjected to tensile stretching forces at a uniform rate of 20mm/minute in Universal Testing Machine (UTM). The ultimate load was evaluated in each of the wires.
Results: The mean ultimate load for 24 gauge wire was noted to be the highest (62.84± 0.38) in 10% elongation and the least (57.44± 0.32) in 12.5%. Whereas in 26 gauge, mean ultimate load was noted to be highest (62.64 ± 0.16) in 5 % elongation and least (58.39 ± 0.26) in 10% elongation.
Conclusion: We can do pre-stretching of 24 gauge wire upto 10 % for maximum ultimate strength and for 26 gauge upto 5% for maximum ultimate strength.

Keywords:
Ultimate Tensile Strength, Universal Testing Machine, Stainless Steel Wire