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http://dx.doi.org/10.4047/jkap.2009.47.1.53

Microleakage of endodontically treated teeth restored with three different esthetic post and cores  

Park, Ji-Geun (Department of Dental Prosthodontics, School of Medicine, Ewha Womans University)
Park, Ji-Man (Department of Dental Prosthodontics, School of Medicine, Ewha Womans University)
Park, Eun-Jin (Department of Prosthodontics, School of Dentistry, Seoul National University)
Publication Information
The Journal of Korean Academy of Prosthodontics / v.47, no.1, 2009 , pp. 53-60 More about this Journal
Abstract
Statement of problem: At present, as the esthetic demands are on the increase, there are many ongoing studies for tooth-colored post and cores. Most of them are about fiber post and prefabricated zirconia post, but few about one-piece milled zirconia post and core using CAD/CAM (computer-aided design/computer-aided manufacturing) technique. Purpose: The objective of this study was to compare microleakage of endodontically treated teeth restored with three different tooth-colored post and cores. Material and methods: Extracted 27 human maxillary incisors were cut at the cementoenamel junction, and the teeth were endodontically treated. Teeth were divided into 3 groups (n=9); restored with fiber post and resin core, prefabricated zirconia post and heat-pressed ceramic core, and CAD/CAM milled zirconia post and core. After the preparation of post space, each post was cemented with dual-polymerized resin cement (Variolink II). Teeth were thermocycled for 1000 cycles between $5-55^{\circ}C$ and dyed in 2% methylene blue at $37^{\circ}C$ for 24 hours. Teeth were sectioned (bucco-lingual), kept the record of microleakage and then image-analyzed using a microscope and computer program. The data were analyzed by one-way ANOVA and Scheffe's multiple range test (${\alpha}=0.05$). Results: All groups showed microleakage and there were no significant differences among the groups (P>.05). Prefabricated zirconia post and heat-pressed ceramic core showed more leakage in dye penetration at the post-tooth margin, but there was little microleakage at the end of the post. Fiber post and resin core group and CAD/CAM milled zirconia post and core group indicated similar microleakage score in each stage. Conclusion: Prefabricated zirconia post and heat-pressed ceramic core group demonstrated better resistance to leakage, and fiber post and resin core group and CAD/CAM milled zirconia post and core group showed the similar patterns. The ANOVA test didn't indicate significant differences in microleakage among test groups. (P>.05)
Keywords
Fiber post; Zirconia post; CAD/CAM milled zirconia post and core; Thermocycling; Microleakage;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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