Microleakage of endodontically treated tooth with post and core restoration materials using exposed and non-exposed intracanal post techniques
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Abstract
Objectives: This in vitro study aimed to investigate coronal microleakage of endodontically treated teeth restored with prefabricated fiber post and resin core materials using two different techniques at different water-exposing time periods.
Materials and methods: Eighty extracted human premolars were endodontically treated and randomly divided into eight groups of ten specimens each. The specimens of groups 1-4 were restored with prefabricated fiber post and core using exposed intracanal post technique, while the specimens of groups 5-8 were restored using non-exposed intracanal post technique. All specimens were thermocycled at different number of cycles representing water-exposing time periods of 1, 2, 4 weeks, and 6 months. After immersion in 2% Methylene blue for 48 hours, the specimens were subsequently cut into two halves longitudinally. The longitudinal sections were used for the measurement of dye infiltration along the interface using image analysis software. Mann-Whitney U-test and Kruskal Wallis test were performed to determine significant differences among microleakage of each group at a significant level of 0.05.
Results: Microleakage was measured with significant difference at the water-exposing time period of 6 months comparing two types of the post-core restoration technique (p = 0.02). Using exposed intracanal post technique, the specimens showed significant microleakage between the water-exposing time periods of 1 week and 6 months (p = 0.01); whereas, no significant difference of coronal microleakage was found among all groups using non-exposed intracanal post technique at different water-exposing time periods.
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References
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