The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)
- Volume 39 Issue 3
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- Pages.260-272
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- 2001
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- 0301-2875(pISSN)
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- 2005-3789(eISSN)
In vitro study of compressive fracture strength of Empress 2 crowns cemented with various luting agents
- Kim Min-Ho (Department of Prosthodontics, College of Dentistry, Seoul National University) ;
- Yang Jae-Ho (Department of Prosthodontics, College of Dentistry, Seoul National University) ;
- Lee Sun-Hyung (Department of Prosthodontics, College of Dentistry, Seoul National University) ;
- Chung Hun-Young (Department of Prosthodontics, College of Dentistry, Seoul National University) ;
- Chang Ik-Tae (Department of Prosthodontics, College of Dentistry, Seoul National University)
- Published : 2001.06.01
Abstract
All-ceramic restorations have had a more limited life expectancy than metal ceramic restorations because of their low strength. Their relatively lower strength and resistance to fracture have restricted the use of all-ceramic crowns to anterior applications where occlusal loads are lower. But there has been increasing interest in all-ceramic restorations because patients are primarily concerned with improved esthetics. Many efforts have been made to in prove the mechanical properties of dental ceramics. This study was designed to elucidate the influence of the luting agent on the strength of the Empress 2 crown (staining technique) cemented on human teeth. Seventy extracted human permanent molar teeth were chosen. Teeth were prepared for Empress 2 crowns with milling machine on a surveyor. A dental bur was placed in the mandrel that was positioned so that the long axis of the bur was perpendicular to the surveyor base. Dimensions of the Empress 2 crown preparation were