Does immediate dentin sealing influence the polymerization of impression materials?

Area of Science:

• Dental Materials Science
• Restorative Dentistry
• Polymer Chemistry

Background:

• Immediate dentin sealing (IDS) is a technique used in restorative dentistry to improve the bond between the tooth and the restoration.
• The oxygen-inhibition layer formed during resin polymerization can interfere with subsequent dental procedures, such as impression taking.

Purpose of the Study:

• To evaluate the interaction between resin materials used in IDS and different dental impression materials.
• To assess the effectiveness of glycerin jelly and alcohol in eliminating the oxygen-inhibition layer and preventing material interaction.

Main Methods:

• Thirty-five human molars were used, with dentin surfaces exposed.
• Teeth were divided into groups based on impression material (Express XT or Impregum) and IDS treatment (Clearfil SE Bond or Protect Liner F, with or without glycerin jelly or alcohol).
• Interactions between resin and impression materials were photographed and analyzed.

Main Results:

• Unpolymerized impression material adhered to resin materials in certain groups, indicating interaction.
• Glycerin jelly and alcohol treatments prevented interactions between Clearfil SE Bond and Express XT, and between Protect Liner F and Impregum.
• These treatments were less effective in preventing interactions between Clearfil SE Bond and Impregum, and between Protect Liner F and Express XT.

Conclusions:

• Resin materials used in IDS can interact with impression materials, potentially affecting clinical outcomes.
• While glycerin jelly and alcohol can mitigate some interactions, they are not universally effective for all material combinations.
• Further research is needed to optimize IDS techniques and material selection to prevent adverse interactions.