Microleakage of endodontically treated teeth restored with posts

Area of Science:

• Dental Materials Science
• Prosthodontics
• Biomaterials Engineering

Background:

• Microleakage around dental posts can compromise restoration longevity and lead to secondary caries.
• The choice of post material (stainless-steel vs. carbon-fiber) and luting cement influences the seal quality.
• Understanding cement performance is crucial for predictable clinical outcomes in post-endodontic restorations.

Purpose of the Study:

• To compare the microleakage of stainless-steel and carbon-fiber post systems.
• To evaluate the influence of different luting cements on microleakage.
• To determine the optimal cement type for minimizing microleakage in post systems.

Main Methods:

• A fluid filtration system was employed to quantify microleakage under 15 psi pressure.
• Stainless-steel and carbon-fiber posts were cemented using four different materials: zinc phosphate, glass ionomer, C & B Metabond, and Panavia-21.
• Microleakage was measured and statistically analyzed to identify significant differences.

Main Results:

• A significant difference in microleakage was observed between the various cements (p < 0.001).
• Zinc phosphate cement exhibited the highest microleakage, while C & B Metabond demonstrated the least.
• No significant difference in microleakage was found between stainless-steel and carbon-fiber posts.

Conclusions:

• The type of luting cement is a critical factor in preventing microleakage around dental posts.
• Dentin-bonding resin cements (C & B Metabond and Panavia-21) significantly reduce microleakage compared to non-dentin-bonding cements.
• Both stainless-steel and carbon-fiber posts benefit from the use of dentin-bonding resin cements for improved marginal integrity.