Material Defects in Ceramic Crowns Identification by Optical Coherence Tomography and MicroCT

Abstract:

Full ceramic crowns are considered revolutionary in developing the concept of aesthetic dentistry. Appreciate their aesthetic appearance particularly raise the cost prices, they do not ensure the risk of fractures and cracks which sometimes face the clinician after their insertion directly into the mouth. As a result of the fracture may occur between disputes team dentist-dental technician. The purpose of this study was to identify flaws of material included in the pottery table analyzing the full ceramic crowns using non-invasive technologies. As materials we use 25 full ceramic crowns (e. max, IVOCLAR) obtained through the technology of pressing were used for this study. Non-invasive methods used for this study were OCT and Micro CT. The OCT technology works in Time Domain, at 1300 nm and scan angle at 18 degrees, and for each sample scans were carried out in areas of maximum voltage. After the scans, we have been obtained through the stack of 500 slicers at a distance of 10 microns each other. A number of 17 samples of the total samples obtained exhibited defects in areas of major stress corresponding to the crown considered. As a result of defects discovered using the technology OCT it has considered necessary for validation them by employing the Micro CT technology. In conclusion, we consider that OCT technology can be considered an early diagnosis method of faults contained in the table structure of the ceramic crowns before inserting them in the oral cavity, by reducing the risks of a prosthetic treatment.

• Periodical: Key Engineering Materials (Volume 614)
• Pages: 124-133
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.614.124
• Online since: June 2014
• Authors: Carla Andreea Madaras, Cosmin Sinescu, Meda Lavinia Negrutiu, Cezar Serban Clonda*, Mihai Rominu, Ciprian Ionita, Aurora Antoniac, Adrian G. Podoleanu
• Keywords: Ceramic, Computed Micro Tomography, Imagistic Methods, Materials Defects, Optical Coherence Tomography

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