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Elasticity in Elastics-An in-vitro study
Supradeep Kumar Kamisetty1, Chakrapani Nimagadda1, Madhoom Ponnachi Begam2
1Department of Orthodontics & Dentofacial Orthopaedics, St. Joseph Dental College, Eluru, Andhra Pradesh, India.
Journal of International Oral Health : JIOH
|May 31, 2014
Summary
Orthodontic elastics, both latex and non-latex, exhibit force decay over time. Non-latex elastics showed greater force degradation compared to latex, impacting clinical force transmission.
Area of Science:
- Orthodontics
- Biomaterials Science
- Dental Materials
Background:
- Orthodontic tooth movement relies on applied forces, with elastics playing a key role in correcting discrepancies.
- Force decay in latex elastics is a significant clinical challenge, affecting treatment predictability.
- Non-latex elastics offer an alternative for latex-sensitive patients, though their performance requires evaluation.
Purpose of the Study:
- To compare the in-vitro performance of latex and non-latex orthodontic elastics.
- To evaluate force decay and mechanical properties of different elastic types from various manufacturers.
Main Methods:
- Samples of latex and non-latex elastics (light, medium, heavy) from three manufacturers were tested.
- Properties analyzed included cross-sectional area, internal diameter, initial force, breaking force, and 48-hour force relaxation.
- Statistical analysis used independent t-tests, ANOVA, and Tukey-HSD tests at p < 0.05.
Main Results:
- Non-latex elastics generally had a greater cross-sectional area than latex elastics.
- No significant difference in internal diameter was observed across all elastic types.
- Force degradation over 48 hours averaged 65-75% of initial values, with non-latex elastics showing greater degradation.
Conclusions:
- Clinical selection of elastics should consider patient history and specific mechanical properties.
- Force decay is a critical factor in elastic performance, necessitating careful material choice.
- Further research into elastic material science is needed to optimize orthodontic treatment.
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