The interaction between lining materials and composite resin restorative materials

Area of Science:

• Dental Materials Science
• Restorative Dentistry
• Biomaterials

Background:

• Dental restorations require protective lining materials.
• Composite resins are widely used restorative materials.
• Liner-composite interactions can affect restoration longevity.

Purpose of the Study:

• To investigate the in vitro effects of four dental lining materials (Dycal, Procal, Cavitec, Poly F cement) on two composite resins (Adaptic, Concise).
• To assess the impact of these liners on composite surface roughness, hardness, and color, with and without an intermediate bonding resin.

Main Methods:

• In vitro evaluation of four lining materials and two composite resins.
• Assessment of surface roughness, hardness, and color changes.
• Comparison of results with and without an intermediate bonding resin.

Main Results:

• Liner-composite interactions varied significantly.
• Procal and Dycal showed minimal interaction, especially with an intermediate resin.
• Cavitec exhibited adverse reactions with the composites.
• Poly F increased surface roughness but not color.

Conclusions:

• Lining material composition, particularly methyl salicylate, influences composite resin interactions.
• Careful selection of lining materials is crucial for maintaining composite restoration integrity.
• Intermediate resins can mitigate some adverse effects of lining materials.