effects of clinical use and sterilization on surface topography and surface roughness of three commonly used types of orthodontic archwires
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2015
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Abstract
Aim: To evaluate the changes in surface topography and roughness of stainless steel (SS), nickel-titanium and beta-titanium (β-Ti) archwires after clinical use and sterilization.
Settings and Design: Thirty wires each of SS, nitinol, and β-Ti (3M Unitek) were tested in as received, as received and autoclaved, and clinically retrieved then autoclaved conditions.
Materials and Methods: A sterilization protocol of 134°C for 18 min was performed using an autoclave. Surface topography of specimens from each subgroup was examined using an environmental scanning electron microscope (ESEM model Quanta 200, The Netherlands) at ×100, ×1000, and ×2500 magnifications. Surface roughness was measured using arithmetic mean roughness (Ra) values obtained from optical profilometric scanning (Taylor Hobson, Leicester, UK).
Statistical Analysis: Data were analyzed by one-way analysis of variance and Tukey's post-hoc procedures.
Results: Scanning electron microscope images revealed an increase in surface irregularities in SS and nitinol wires after clinical use. There was a significant increase in Ra values of SS orthodontic wires after intra-oral exposure (P = 0.0002).
Conclusion: Surface roughness of SS wires increased significantly after clinical use. Autoclave sterilization did not affect considerably on surface characteristics of any archwire.
| Reference Key |
isac2015indianeffects
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| Authors | ;Joji Isac;B S Chandrashekar;S Mahendra;C M Mahesh;Bala Mohan Shetty;A V Arun |
| Journal | Applied and environmental microbiology |
| Year | 2015 |
| DOI |
10.4103/0970-9290.167628
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