Denture cleanser effect on resilient liners with distinct optical characteristics.

Area of Science:

• Dental Materials Science
• Prosthodontics
• Surface Chemistry

Background:

• Resilient liners are used to improve denture comfort and fit.
• Denture cleansing solutions can affect the physical properties of liners.
• Long-term effects of various cleansing solutions on liners are not fully understood.

Purpose of the Study:

• To assess the impact of denture cleansing solutions on surface roughness and color stability of transparent and white resilient liners.
• To evaluate these effects over the maximum recommended period of use.

Main Methods:

• Two types of resilient liners (transparent and white) were tested.
• Specimens were immersed daily in 0.25%, 0.5%, 1% sodium hypochlorite (SH), or 4% acetic acid solutions for 20 minutes.
• Surface roughness (Ra) and color stability (ΔE) were measured at multiple time points up to 270 days.
• Statistical analysis included three-way ANOVA and repeated measure ANOVA.

Main Results:

• The white liner exhibited greater surface roughness changes than the transparent liner.
• Higher concentrations of SH led to more significant color changes, especially in the transparent liner.
• 0.25% SH demonstrated the least surface roughness and color alteration for both liner types.

Conclusions:

• Denture liner changes are dependent on cleansing solution concentration and exposure duration.
• White resilient liners are more color-stable than transparent ones.
• 0.25% sodium hypochlorite is recommended for daily denture cleansing to minimize material degradation.