Microleakage along glass-fibre posts cemented with three different materials after cyclic loading: a pilot study.

Area of Science:

• Restorative Dentistry
• Biomaterials Science
• Dental Materials

Background:

• Dental post-endodontic restorations are crucial for tooth function.
• Microleakage around posts can compromise restoration longevity.
• Evaluating cement performance under stress is essential.

Purpose of the Study:

• To compare microleakage of glass-fibre posts cemented with three different dental cements after cyclic loading.
• To assess the influence of cyclic loading on post-cement interface integrity.
• To determine the optimal cement for glass-fibre post cementation regarding microleakage.

Main Methods:

• In vitro evaluation of microleakage along glass-fibre posts.
• Fifty obturated root canals prepared for post space.
• Cementation with Harvard, Fuji PLUS, and Variolink II cements.
• Cyclic loading applied to specimens.
• Coronal microleakage assessed using a fluid transport system.

Main Results:

• Variolink II showed a significantly higher failure rate post-loading (p = 0.009).
• In non-failed samples, Variolink II exhibited significantly less fluid transport than zinc phosphate and glass ionomer cements (p = 0.04 and p = 0.006).
• Variolink II demonstrated significantly less fluid movement compared to Harvard and Fuji PLUS cements.

Conclusions:

• Variolink II cement may offer superior sealing properties against microleakage despite a higher failure rate under cyclic loading.
• Further research is needed to optimize cement formulations for enhanced durability and sealing.
• Clinical recommendations should consider the trade-off between sealing ability and mechanical resistance for post-endodontic restorations.