Failure morphology of all-ceramic prostheses.
The aim of this study is to investigate the internal morphology of all-ceramic prostheses before seating. Micro X-ray CT was used to inspect three dimensionally the locations and sizes of pores within experimentally fabricated all-ceramic crowns as well as measure the veneer and core thickness. Scanning electron microscopy (SEM) was used to examine the fracture sites of clinically failed prostheses. Micro X-ray CT analysis revealed the distribution patterns of pores within the all-ceramic prostheses, and SEM fractographic analysis indicated a strong relationship between the existence of pores and crack propagation. Therefore, micro X-ray CT is a useful tool for nondestructive inspection of the internal morphology of all-ceramic prostheses to identify the critical defects before seating.
Department of Surgery, Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.
Xin
X
Wu
Masafumi
M
Nakagawa
Fumio
F
Teraoka
D003442:Crowns; D003776:Dental Porcelain; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis; D003801:Dental Veneers; D019544:Equipment Failure Analysis; D006801:Humans; D008855:Microscopy, Electron, Scanning; D016062:Porosity; D055114:X-Ray Microtomography
D003776:Dental Porcelain