Elastomeric chain force decay in artificial saliva: an in vitro study.

Area of Science:

• Materials Science
• Biomaterials Engineering
• Orthodontics

Background:

• Elastomeric chains are crucial in orthodontic treatment for space closure and tooth movement.
• Their mechanical properties, particularly force decay, can be influenced by the oral environment.

Purpose of the Study:

• To re-evaluate the mechanical properties of orthodontic elastomeric chains.
• To assess force decay after stretching in various artificial saliva solutions and air.

Main Methods:

• Five brands of elastomeric chains were tested.
• Chains were stretched to specific force levels using a test kit.
• Samples were immersed in artificial saliva solutions or air (control), with residual force measured over time using a dynamometer.

Main Results:

• Significant and rapid force decay was observed in all tested elastomeric chains.
• The rate and extent of force decay differed among brands and immersion media.
• Environmental factors, including artificial saliva composition, demonstrably affected chain performance.

Conclusions:

• The mechanical integrity of elastomeric chains is compromised by exposure to artificial saliva.
• Variability in force decay highlights the importance of material selection and environmental considerations in orthodontic applications.