Root canal filling evaluation using optical coherence tomography

Meda L. Negrutiu; Cosmin Sinescu; Florin Topala; Luminita Nica; Ciprian Ionita; Corina Marcauteanu; Luciana Goguta; Adrian Bradu; George Dobre; Mihai Rominu; Adrian Gh. Podoleanu

doi:10.1117/12.854842

18 May 2010 Root canal filling evaluation using optical coherence tomography

Meda L. Negrutiu, Cosmin Sinescu, Florin Topala, Luminita Nica, Ciprian Ionita, Corina Marcauteanu, Luciana Goguta, Adrian Bradu, George Dobre, Mihai Rominu, Adrian Gh. Podoleanu

Author Affiliations +

Proceedings Volume 7715, Biophotonics: Photonic Solutions for Better Health Care II; 77151T (2010) https://doi.org/10.1117/12.854842
Event: SPIE Photonics Europe, 2010, Brussels, Belgium

Abstract

Endodontic therapy consists in cleaning and shaping the root canal system, removing organic debris and sealing the intra-canal space with permanent filling materials. The purpose of this study was to evaluate various root canal fillings in order to detect material defects, the marginal adaptation at the root canal walls and to assess the quality of the apical sealing. 21 extracted single-root canal human teeth were selected for this study. We instrumented all roots using NiTi rotary instruments. All canals were enlarged with a 6% taper size 30 GT instrument, 0,5 mm from the anatomical apex. The root canals were irrigated with 5% sodium hypochlorite, followed by 17% ethylenediaminetetraacetic acid (EDTA). After the instrumentation was completed, the root canals were obturated using a thermoplasticizable polymer of polyesters. In order to assess the defects inside the filling material and the marginal fit to the root canal walls, the conebeam micro-computed tomography (CBμCT) was used first. After the CBμCT investigation, time domain optical coherence tomography working in en face mode (TDefOCT) was employed to evaluate the previous samples. The TDefOCT system was working at 1300 nm and was doubled by a confocal channel at 970 nm. The results obtained by CBμCT revealed no visible defects inside the root-canal fillings and at the interfaces with the root-canal walls. TDefOCT investigations permit to visualize a more complex stratificated structure at the interface filling material/dental hard tissue and in the apical region.

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Meda L. Negrutiu, Cosmin Sinescu, Florin Topala, Luminita Nica, Ciprian Ionita, Corina Marcauteanu, Luciana Goguta, Adrian Bradu, George Dobre, Mihai Rominu, and Adrian Gh. Podoleanu "Root canal filling evaluation using optical coherence tomography", Proc. SPIE 7715, Biophotonics: Photonic Solutions for Better Health Care II, 77151T (18 May 2010); https://doi.org/10.1117/12.854842

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KEYWORDS

Optical coherence tomography

Teeth

Human-machine interfaces

Interfaces

Confocal microscopy

Tissues

Image resolution

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