All ceramic table tops analyzed using swept source optical coherence tomography

Eniko Tunde Stoica; Corina Marcauteanu; Cosmin Sinescu; Meda Lavinia Negrutiu; Florin Topala; Virgil Florin Duma; Adrian Bradu; Adrian Gh. Podoleanu

doi:10.1117/12.2191909

22 March 2016 All ceramic table tops analyzed using swept source optical coherence tomography

Eniko Tunde Stoica, Corina Marcauteanu, Cosmin Sinescu, Meda Lavinia Negrutiu, Florin Topala, Virgil Florin Duma, Adrian Bradu, Adrian Gh. Podoleanu

Author Affiliations +

Proceedings Volume 9670, Sixth International Conference on Lasers in Medicine; 967011 (2016) https://doi.org/10.1117/12.2191909
Event: Sixth International Conference on Lasers in Medicine, 2015, Bucharest, Romania

Abstract

Erosion is the progressive loss of tooth substance by chemical processes that do not involve bacterial action. The affected teeth can be restored by using IPS e.max Press “table tops”, which replace the occlusal surfaces. In this study we applied a fast in-house Swept Source Optical Coherence Tomography (SS OCT) system to analyze IPS e.max Press “table tops”. 12 maxillary first premolars have been extracted and prepared for “table tops”. These restorations were subjected to 3000 alternating cycles of thermo-cycling in a range from -10°C to +50°C; mechanical occlusal loads of 200 N were also applied. Using SS OCT we analyze the marginal seal of these restorations, before and after applying the mechanical and thermal strain. The characteristics of the SS OCT system utilized are presented. Its depth resolution, measured in air is 10 μm. The system is able to acquire entire volumetric reconstructions in 2.5 s. From the dataset acquired high resolution en-face projections were also produced. Thus, the interfaces between all ceramic “table tops” and natural teeth were analyzed on the cross-sections (i.e., the B-scans) produced and also on the volumetric (tri-dimensional (3D)) reconstructions, several open interfaces being detected. The study therefore demonstrates the utility of SS OCT for the analysis of lithium disilicate glass ceramic “table tops”.

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Eniko Tunde Stoica, Corina Marcauteanu, Cosmin Sinescu, Meda Lavinia Negrutiu, Florin Topala, Virgil Florin Duma, Adrian Bradu, and Adrian Gh. Podoleanu "All ceramic table tops analyzed using swept source optical coherence tomography ", Proc. SPIE 9670, Sixth International Conference on Lasers in Medicine, 967011 (22 March 2016); https://doi.org/10.1117/12.2191909

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KEYWORDS

Optical coherence tomography

Teeth

Ceramics

Interfaces

Lithium

Cements

Chemical analysis

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