Temperature variation in metal ceramic technology analyzed using time domain optical coherence tomography

Cosmin Sinescu; Florin Ionel Topala; Meda Lavinia Negrutiu; Virgil-Florin Duma; Adrian Gh. Podoleanu

doi:10.1117/12.2045848

14 January 2014 Temperature variation in metal ceramic technology analyzed using time domain optical coherence tomography

Cosmin Sinescu, Florin Ionel Topala, Meda Lavinia Negrutiu, Virgil-Florin Duma, Adrian Gh. Podoleanu

Author Affiliations +

Proceedings Volume 8925, Fifth International Conference on Lasers in Medicine: Biotechnologies Integrated in Daily Medicine; 89250T (2014) https://doi.org/10.1117/12.2045848
Event: Fifth International Conference on Lasers in Medicine, 2013, Timisoara, Romania

Abstract

The quality of dental prostheses is essential in providing good quality medical services. The metal ceramic technology applied in dentistry implies ceramic sintering inside the dental oven. Every ceramic material requires a special sintering chart which is recommended by the producer. For a regular dental technician it is very difficult to evaluate if the temperature inside the oven remains the same as it is programmed on the sintering chart. Also, maintaining the calibration in time is an issue for the practitioners. Metal ceramic crowns develop a very accurate pattern for the ceramic layers depending on the temperature variation inside the oven where they are processed. Different patterns were identified in the present study for the samples processed with a variation in temperature of +30 °C to +50 °C, respectively - 30 0°C to -50 °C. The OCT imagistic evaluations performed for the normal samples present a uniform spread of the ceramic granulation inside the ceramic materials. For the samples sintered at a higher temperature an alternation between white and darker areas between the enamel and opaque layers appear. For the samples sintered at a lower temperature a decrease in the ceramic granulation from the enamel towards the opaque layer is concluded. The TD-OCT methods can therefore be used efficiently for the detection of the temperature variation due to the ceramic sintering inside the ceramic oven.

Citation Download Citation

Cosmin Sinescu, Florin Ionel Topala, Meda Lavinia Negrutiu, Virgil-Florin Duma, and Adrian Gh. Podoleanu "Temperature variation in metal ceramic technology analyzed using time domain optical coherence tomography", Proc. SPIE 8925, Fifth International Conference on Lasers in Medicine: Biotechnologies Integrated in Daily Medicine, 89250T (14 January 2014); https://doi.org/10.1117/12.2045848

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