A comparison of different ligation methods on friction

Area of Science:

• Orthodontics
• Biomaterials Science
• Dental Mechanics

Background:

• Sliding mechanics in orthodontics often involve high friction.
• Elastomeric modules are commonly used for ligation, but their frictional properties can be suboptimal.
• A novel polymeric coated elastomeric module was developed to address friction reduction.

Purpose of the Study:

• To evaluate the frictional properties of a novel coated elastomeric module.
• To compare the coated module's performance against conventional ligation methods and self-ligating brackets.
• To assess the stability and durability of the polymeric coating under simulated oral conditions.

Main Methods:

• Six ligation methods were tested: uncoated, coated, conventional silver, easy-to-tie, silicone-impregnated, and standard silver modules.
• Standard stainless steel brackets and 0.019 x 0.025-in archwires were used.
• Frictional resistance was measured, and two self-ligating bracket systems (Speed and Damon 2) were included for comparison.

Main Results:

• Damon 2 self-ligating brackets exhibited the lowest friction, followed by the coated modules.
• Coated modules demonstrated 50% less friction compared to all other tested ligation methods, excluding Damon 2.
• The coating's frictional properties remained stable after repeated testing and a week of storage in simulated saliva.

Conclusions:

• The polymeric coated elastomeric module significantly reduces friction in orthodontic ligation.
• The coating proved resistant to simulated oral environmental factors.
• The study highlights the potential of coated modules as a low-friction alternative in orthodontic treatment.