Journal of the Korean Academy of Esthetic Dentistry (대한심미치과학회지)

Korean Academy of Esthetic Dentistry (대한심미치과학회)
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Factors affecting fracture of full contour monolithic zirconia dental prosthesis in laboratory process

구치부 심미수복, 풀지르코니아 크라운의 파절원인과 그 해결방안

  • Published : 2014.11.09
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Abstract

There are several factors affected fractures of full contour zirconia (FCZ) dental prosthesis in laboratory process. First, residual moisture can cause zirconia cracks. Complete dry is requisite before zirconia sintering to prevent zirconia cracks. Second, slow cooling rate is essential to prevent cracks during zirconia sintering process. Cracks in bridge pontic area, thick dental implant prosthesis can be prevented by slow cooling rate such as 3 degree Celsius per minute during zirconia sintering. Third, slow heating rate and slow cooling rate during staining and glazing procedure is necessary to inhibit thermal shock of sintered dental zirconia. Lower preheat temperature of porcelain furnace is recommended. Finally, using diamond disc to open embrasure can lead cracks.

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References

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