Differences in the Prolonged Effectiveness Between Two Denture Adhesives With Different Rheological Characteristics

Area of Science:

• Materials Science
• Biomaterials Engineering
• Geriatric Dentistry

Background:

• Denture adhesives improve denture stability and user confidence.
• Understanding the long-term effectiveness of different denture adhesives is crucial for patient satisfaction.

Purpose of the Study:

• To compare the long-term effectiveness of two marketed denture adhesives with distinct material science characteristics.
• To evaluate in vitro material properties and in vivo performance, including denture movement and subjective stability.

Main Methods:

• In vitro analysis of adhesion strength, viscosity, viscoelastic properties, and temporal adhesion changes.
• In vivo study with 12 participants evaluating denture movement and subjective stability (stableness, duration, wobble, slippage) over seven hours.
• Randomized crossover design comparing adhesive A and adhesive B.

Main Results:

• In vitro: No significant differences in adhesion strength or viscosity; significant differences in storage moduli, loss moduli, and loss tangents.
• In vitro: Adhesive B showed significantly higher temporal adhesion strength in later cycles.
• In vivo: Adhesive B was preferred for "duration of stableness"; no significant differences in denture movement or other subjective evaluations; both adhesives improved stability over time.

Conclusions:

• Both denture adhesives demonstrate sufficient long-lasting clinical effectiveness.
• Despite differing in vitro material characteristics, both adhesives enhance denture stability and subjective quality of life.
• Further research is needed to assess performance under more challenging oral conditions.