Physical properties of different orthodontic cements

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Orthodontic Technology

Background:

• Orthodontic cements are crucial for bracket adhesion and appliance stability.
• Understanding cement properties is vital for successful long-term clinical outcomes.
• Traditional cements and resin-modified glass ionomer cements (RMGICs) are commonly used in orthodontics.

Purpose of the Study:

• To compare the water absorption, solubility, and compressive strength of commonly used orthodontic cements.
• To identify the most suitable cements for the oral environment based on mechanical and physical properties.
• To evaluate Adhesor®, Ketac™ Cem, Ortho Band Paste LC™, Glass Ionomer Band Cement, and Transbond™ Plus.

Main Methods:

• Compressive strength was assessed using a universal testing machine.
• Water absorption and solubility were determined by measuring weight changes after immersion in distilled water for 1, 7, and 30 days.
• Statistical analysis was performed to compare cement properties.

Main Results:

• Adhesor® and Ketac™ Cem exhibited significantly higher solubility values compared to other cements after 1, 7, and 30 days of water immersion (p < 0.001).
• Traditional orthodontic cements demonstrated higher water solubility and absorption.
• Transbond™ Plus showed the highest compressive strength, while Adhesor® had the lowest.

Conclusions:

• Resin-modified glass ionomer cements (RMGICs) possess superior mechanical and physical properties compared to traditional orthodontic cements.
• RMGICs exhibit lower water solubility and absorption, and higher compressive strength, indicating better suitability for the oral environment.
• Transbond™ Plus is recommended for its high compressive strength, whereas Adhesor® is least suitable due to low compressive strength and high solubility.