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Proceedings Paper

Evaluation of Tizian overlays by means of a swept source optical coherence tomography system
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Paper Abstract

The teeth affected by pathologic attrition can be restored by a minimally invasive approach, using Tizian overlays. In this study we prove the advantages of a fast swept source (SS) OCT system in the evaluation of Tizian overlays placed in an environment characterized by high occlusal forces. 12 maxillary first premolars were extracted and prepared for overlays. The Tizian overlays were subjected to 3000 alternating cycles of thermo-cycling (from -10°C to +50°C) and to mechanical occlusal overloads (at 800 N). A fast SS OCT system was used to evaluate the Tizian overlays before and after the mechanical and thermal straining. The SS (Axsun Technologies, Billerica, MA) has a central wavelength of 1060 nm, sweeping range of 106 nm (quoted at 10 dB) and a 100 kHz line rate. The depth resolution of the system, measured experimentally in air was 10 μm. The imaging system used for this study offers high spatial resolutions in both directions, transversal and longitudinal of around 10 μm, a high sensitivity, and it is also able to acquire entire tridimensional (3D)/volume reconstructions as fast as 2.5 s. Once the full dataset was acquired, rendered high resolutions en-face projections could be produced. Using them, the overlay (i.e., cement) abutment tooth interfaces were remarked both on B-scans/two-dimensional (2D) sections and in the 3D reconstructions. Using the system several open interfaces were possible to detect. The fast SS OCT system thus proves useful in the evaluation of zirconia reinforced composite overlays, placed in an environment characterized by high occlusal forces.

Paper Details

Date Published: 22 March 2016
PDF: 6 pages
Proc. SPIE 9670, Sixth International Conference on Lasers in Medicine, 96700X (22 March 2016); doi: 10.1117/12.2191905
Show Author Affiliations
Corina Marcauteanu, Univ. of Medicine and Pharmacy Victor Babes Timisoara (Romania)
Cosmin Sinescu, Univ. of Medicine and Pharmacy Victor Babes Timisoara (Romania)
Meda Lavinia Negrutiu, Univ. of Medicine and Pharmacy Victor Babes Timisoara (Romania)
Eniko Tunde Stoica, Univ. of Medicine and Pharmacy Victor Babes Timisoara (Romania)
Florin Topala, Univ. of Medicine and Pharmacy Victor Babes Timisoara (Romania)
Virgil Florin Duma, Aurel Vlaicu Univ. of Arad (Romania)
Politehnica Univ. of Timisoara (Romania)
Univ. of West Timisoara (Romania)
Adrian Bradu, Univ. of Kent (United Kingdom)
Adrian Gh. Podoleanu, Univ. of Kent (United Kingdom)


Published in SPIE Proceedings Vol. 9670:
Sixth International Conference on Lasers in Medicine
Darinca Carmen Todea; Adrian Gh. Podoleanu; Virgil-Florin Duma, Editor(s)

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