Microleakage of endodontically treated teeth restored with three different esthetic post and cores.
10.4047/jkap.2009.47.1.53
- Author:
Ji Geun PARK
1
;
Ji Man PARK
;
Eun Jin PARK
Author Information
1. Department of Dental Prosthodontics, School of Medicine, Ewha Womans University, Korea. prosth@ewha.ac.kr
- Publication Type:Original Article
- Keywords:
Fiber post;
Zirconia post;
CAD/CAM milled zirconia post and core;
Thermocycling;
Microleakage
- MeSH:
Ceramics;
Hot Temperature;
Humans;
Incisor;
Methylene Blue;
Resin Cements;
Software;
Tooth;
Tooth Cervix;
Zirconium
- From:The Journal of Korean Academy of Prosthodontics
2009;47(1):53-60
- CountryRepublic of Korea
- Language:Korean
-
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 degrees C and dyed in 2 percent methylene blue at 37 degrees 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)
