THE EFFECT OF ENVIRONMENTAL FACTORS ON ELASTOMERIC CHAINS AND NICKEL TITANIUM COIL SPRINGS

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Abstract


It is well known that elastomers exhibit viscoelasticity and as such have their mechanical properties modified by temperature. Nickel titanium archwires are also affected by temperature and have been modified with specific temperature related properties for clinical use. What is less well known is the effect that other environmental factors, such as food, might have on the force delivery properties of both elastomeric materials and nickel titanium coil springs used for space closure. The aim of this work was to determine the effect three common environmental factors coca cola, refined sunflower oil, and pasteurized milk have on elastomeric chain and nickel titanium coil springs. In addition, it was decided to re-examine the effect of temperature at 22 C, 36,6 C, and 55 C on both these space closing materials. Degradation force measurements were made at the following intervals: 0, 1, 7, 14, 21, and 28 days. The results indicated that elastomeric chains were affected by all the test food liquids while nickel titanium springs were more affected by low temperature.


A N Shaddud

Principal contact for editorial correspondence.
Aimanshaddoud@yahoo.com
Peoples’ Friendship University of Russia Moscow 117198, Russia, 10/2 Miklukho- Maklaya

Shaddud Aiman, Postgraduate student of the Department of pediatric dentistry and orthodontics Medical Institute Peoples’ Friendship University of Russia Moscow

T F Kosyreva

Aimanshaddoud@yahoo.com
Peoples’ Friendship University of Russia Moscow 117198, Russia, 10/2 Miklukho- Maklaya

  • Andreasen G. F., Bishara S. 1970 Comparison of Alastik chains with elastics involved with intra-arch molarto-molar forces. American Journal of Orthodontics 40:151—15 8.
  • Fraunhofer J. A., von, Coffelt M. T. P., Orbell G. M. 1992 The effects of artificial saliva and topical fluoride treatments on the degradation of the elastic properties of orthodontic chains. Angle Orthodontist 62: 265—274.
  • Baty D. L., Volz J. E., von Fraunhofer J. A. 1994 Force delivery properties of colored elastomeric modules. American Journal of Orthodontics and Dentofacial Orthopedics 106: 40—46.
  • De Genova D. C., McInnes-Ledoux P., Weinberg R., Shaye R. 1985 Force degradation of orthodontic elastomeric chains —A product comparison study. American Journal of Orthodontics 87: 377—384.
  • Ash J. L., Nikolai R. J. 1978 Relaxation of orthodontic elastomeric chains and modules in vitro and in vivo. Journal of Dental Research 57: 685—690.
  • Han S., Quick D. C. 1993 Nickel-titanium spring properties in a simulated oral environment. Angle Orthodontist 63: 67—72.

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