Development of a nondestructive compliance test for resilient denture liners

Area of Science:

• Biomaterials Science
• Dental Materials Engineering
• Mechanical Testing

Background:

• Resilient denture liners are crucial for patients with thin mucosa or severe alveolar ridge resorption.
• Evaluating new soft liner materials non-destructively is essential for clinical trials.

Purpose of the Study:

• To evaluate a nondestructive compliance testing technique.
• To characterize long-term, silicone-based resilient denture liner materials.

Main Methods:

• A closed-loop servohydraulic testing system applied a 3 lb force to silicone-based denture liner samples.
• Compliance values were determined by analyzing force and position data using computer software.
• The effect of material thickness (1.1-4.4 mm) on compliance was assessed.

Main Results:

• The testing technique demonstrated significant differences in compliance based on material thickness (p <.0001).
• MPDS-SL exhibited more elastic behavior than Molloplast-B (p <.0001).
• Compliance did not increase beyond 2.2 mm thickness, though MPDS-SL showed a steeper thickness-compliance curve.

Conclusions:

• The compliance testing method is sensitive enough to differentiate between materials and thicknesses.
• The nondestructive nature and sensitivity make this test suitable for clinical evaluation of resilient denture liners.