Force decay of intermaxillary orthodontic elastics: in vitro study

Hubert Kardach; Aneta Olszewska; Ewa Firlej; Agnieszka Bogdanowicz; Ewelina Golusińska-Kardach; Anna Szponar-Żurowska; Barbara Biedziak

doi:10.20883/jms.316

Authors

Hubert Kardach Division of Facial Malformation, Department of Dental Surgery, Poznan University of Medical Sciences, Poland https://orcid.org/0000-0002-6204-4266
Aneta Olszewska Division of Facial Malformation, Department of Dental Surgery, Poznan University of Medical Sciences, Poland https://orcid.org/0000-0003-1286-6779
Ewa Firlej Division of Facial Malformation, Department of Dental Surgery, Poznan University of Medical Sciences, Poland https://orcid.org/0000-0002-4070-1210
Agnieszka Bogdanowicz Division of Facial Malformation, Department of Dental Surgery, Poznan University of Medical Sciences, Poland https://orcid.org/0000-0001-8364-1935
Ewelina Golusińska-Kardach Department of Dental Surgery, Poznan University of Medical Sciences, Poland https://orcid.org/0000-0002-9520-2670
Anna Szponar-Żurowska Division of Facial Malformation, Department of Dental Surgery, Poznan University of Medical Sciences, Poland https://orcid.org/0000-0002-9226-1704
Barbara Biedziak Division of Facial Malformation, Department of Dental Surgery, Poznan University of Medical Sciences, Poland https://orcid.org/0000-0002-6150-9957

DOI:

https://doi.org/10.20883/jms.316

Keywords:

force decay, orthodontic elastics, artificial saliva, elastomeric

Abstract

Introduction. Orthodontic elastics are widely used in orthodontic treatment. It’s been proved that they have advantages such as low cost, ease of use, but also disadvantages, mainly force decay in time and increased entrapment of biofilm. Amount of the force is of extreme significance. This force can be altered by physical or chemical factors.
Material and Methods. Latex elastics in 3 different diameters were selected for this study. Each elastic was stretched and placed on hooks that are at specified distances that equal 3 times the diameter of each elastic. The forces produced by stretching was measured using tension gauge and the measurement were taken at specific time intervals of 0h, 3h, 12h, 24h. The same process was repeated for elastics in dry and artificial environment.
Results. Elastics in the dry environment showed progressive force decay cause by stretching over time. Just after 3 hours force decay between 6,07% and 8,75% was observed. The biggest loss of force between 13,61 — 16,13 % was measured after 24 hours. Compared to the dry environment, an even more significant force decay was observed in the artificial saliva. After first 3 hours force loss was between 4,99% — 9,22%. The biggest force decay was observed after 24 hours and it was 5 % higher compared to dry environment.
Conclusions. 1) The artificial saliva environment and time of exposure to it, have a negative effect on the properties of elastomeric. 2) To maintain the effective orthodontic strength of elastics, they should be replaced every 12 hours.

Downloads

Download data is not yet available.

References

Lacerda Dos Santos R, Pithon MM, Romanos MT. The influence of pH levels on mechanical and biological properties of nonlatex and latex elastics. The Angle Orthodontist. 2012;82:709–714.

Stoner MM. Extraction treatment. In: Graber TM, editor. Orthodontic concepts and techniques, volume 1. Philadelphia: W. B. Saunders; 1969.

Andreasen GF, Bishara SE. Comparison of alastik chains with elastics involved with intra‑arch molar to molar forces. Angle Orthod. 1970;40:151–8.

Bishara SE, Andreasen GF. A comparison of time related forces be tween plastic alastiks and latex elastics. Angle Orthod. 1970;40: 319–28.

Buchmann N, Senn C, Ball J, Brauchli L. Influence of initial strain on the force decay of currently available elastic chains over time. Angle Orthod. 2012;82:529–35.

Ash JL, Nikolai RJ. Relaxation of orthodontic elastomeric chains and modules in vitro and in vivo. J Dent Res. 1978;57:685–90.

de Souza RA, de Araujo Magnani MB, Nouer DF, da Silva CO, Klein MI, Sallum EA, et al. Periodontal and microbiologic evalu- ation of 2 methods of a archwire ligation: Ligature wires and elas- tomeric rings. Am J Orthod Dentofacial Orthop. 2008;134: 506–12.

Sauget PS, Stewart KT, Katona TR. The effect of pH levels on nonlatex vs latex interarch elastics. The Angle Orthodontist. 2011;81:1070–1074.

Beattie S, Monaghan P. An in vitro study simulating effects of daily diet and patient elastic band change compliance on orthodontic latex elastics. The Angle Orthodontist. 2004;74:234–239.

Pithon MM, Souza RF, Freitas LMA et al. Mechanical properties intermaxillary latex and latex‑free elastics. Journal of the World Federation of Orthodontists. 2013;2:15–18.

Loriato LB, Machado AW, Pacheco W. Clinical and biomechanical aspects of elastics in Orthodontics. Dental Press Journal of Orthodontics. 2006;5:43–55.

Fernandes DJ, Fernandes GM, Artese F et al. Force extension relaxation of medium force orthodontic latex elastics. The Angle Orthodontist. 2011;81:812–819.

Loch J, Krawiec H. Zachowanie korozyjne stopów kobaltu w roztworze sztucznej śliny. Archives of Foundry Engineering. 2013;13:101–106.

Kumar K, Shetty S, Krithika MJ, et al. Effect of commonly used beverage, soft drink, and mouthwash on force delivered by elastomeric chain: a comparative in vitro study. Journal of International Oral Health. 2014;3:7–10.

Pithon MM, Mendes JL, da Silva CA et al. Force decay of latex and non‑latex intermaxillary elastics: a clinical study. European Journal of Orthodontics. 2016;1:39–43.

Force decay of intermaxillary orthodontic elastics: in vitro study

Authors

DOI:

Keywords:

Abstract

Downloads

References

Downloads

Published

Issue

Section

License

How to Cite

Make a Submission

keyfacts