Shock-absorbing behavior of four processed soft denture liners

Area of Science:

• Biomaterials Science
• Dental Materials Engineering
• Prosthodontics

Background:

• Denture use can lead to discomfort and impact on oral tissues.
• Soft denture liners are designed to improve patient comfort and reduce stress on the denture base.

Purpose of the Study:

• To evaluate the cushioning effect of various soft denture liners.
• To compare the shock absorption capabilities of different soft liner materials.

Main Methods:

• A free drop test utilizing an accelerometer was employed.
• The impact force reduction of SuperSoft, Kurepeet-Dough, Molteno Soft, and Molloplast-B was measured.
• Material performance was assessed after 180 days of storage in distilled water.

Main Results:

• All tested soft denture liners reduced impact forces compared to denture base resin.
• A 2.4 mm thickness of soft denture material provided good shock absorption.
• Molloplast-B and Molteno Soft exhibited excellent shock absorption.
• Damping effects increased for all materials after 180 days of water storage.
• Material aging influenced the cushioning properties.

Conclusions:

• Soft denture liners effectively mitigate impact forces, enhancing denture wearability.
• Molloplast-B and Molteno Soft are particularly effective shock-absorbing materials.
• Long-term water storage and aging can modify and potentially improve the cushioning performance of these liners.