Time-dependent force depreciation of intraoral orthodontic elastics of variable force and lumen sizes – An in vitro study

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Original Article

Author Details : Mridu Sethi, Piush Kumar, Monis Raza*, Payal Sharma, Ankit Kumar Shahi

Volume : 8, Issue : 1, Year : 2024

Article Page : 23-28

https://doi.org/10.18231/j.jco.2024.004

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Abstract

Objective: To evaluate force decay of elastics of different dimensions and different force values over 48-hours.
Materials and Methods: Steps included extension and immersion of elastics in artificial saliva and measurement of force levels at a specified point of time. A model with vertical pins placed at in the oral cavity. The initial force measurement was done using Universal testing machine before the elastics were engaged onto the pins 37?C in artificial saliva. The reading was taken after this in the Universal testing machine for the samples. The elastics were then placed back into the static simulation for the next 23 hours and again into the dynamic simulation for the next 1 hour.
Results: Statistically significant difference (P<0> Conclusion: Elastics with higher force and smaller lumen size show comparatively higher loss of force than the lighter elastics with larger internal diameter. The maximum force loss of a particular elastic happens within the first 24 hours of elastic stretch.
Clinical Significance: The study would help provide information about how an elastic's lumen size and initial force are interdependent, giving clinicians a better understanding of how to prescribe the right elastics for the force they need to apply for treatment.

Keywords: Elastics, Force decay, Lumen size

How to cite : Sethi M, Kumar P, Raza M, Sharma P, Shahi A K, Time-dependent force depreciation of intraoral orthodontic elastics of variable force and lumen sizes – An in vitro study. J Contemp Orthod 2024;8(1):23-28

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