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Analysis of dental abfractions by optical coherence tomography

Demjan, Enikö and Mărcăuţeanu, Corina and Bratu, Dorin and Sinescu, Cosmin and Negruţiu, Meda and Ionita, Ciprian and Topală, Florin and Hughes, Michael and Bradu, Adrian and Dobre, George and Podoleanu, Adrian Gh. (2010) Analysis of dental abfractions by optical coherence tomography. In: Lasers in Dentistry XVI. Proceedings of SPIE . SPIE. ISBN 978-0-8194-7945-7. (doi:10.1117/12.842819) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:49420)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
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Aim and objectives. Abfraction is the pathological loss of cervical hard tooth substance caused by biomechanical overload. High horizontal occlusal forces result in large stress concentrations in the cervical region of the teeth. These stresses may be high enough to cause microfractures in the dental hard tissues, eventually resulting in the loss of cervical enamel and dentin. The present study proposes the microstructural characterization of these cervical lesions by en face optical coherence tomography (eFOCT). Material and methods: 31 extracted bicuspids were investigated using eFOCT. 24 teeth derived from patients with active bruxism and occlusal interferences; they presented deep buccal abfractions and variable degrees of occlusal pathological attrition. The other 7 bicuspids were not exposed to occlusal overload and had a normal morphology of the dental crowns. The dental samples were investigated using an eFOCT system operating at 1300 nm (B-scan at 1 Hz and C-scan mode at 2 Hz). The system has a lateral resolution better than 5 μm and a depth resolution of 9 μm in tissue. OCT images were further compared with micro - computer tomography images. Results. The eFOCT investigation of bicuspids with a normal morphology revealed a homogeneous structure of the buccal cervical enamel. The C-scan and B-scan images obtained from the occlusal overloaded bicuspids visualized the wedge-shaped loss of cervical enamel and damage in the microstructure of the underlaying dentin. The high occlusal forces produced a characteristic pattern of large cracks, which reached the tooth surface. Conclusions: eFOCT is a promising imaging method for dental abfractions and it may offer some insight on the etiological mechanism of these noncarious cervical lesions.

Item Type: Book section
DOI/Identification number: 10.1117/12.842819
Uncontrolled keywords: Abfractions, Bruxism, En face optical coherence tomography, Occlusal overload, Abfraction, Abfractions, Bruxism, Cervical lesions, Computer tomography images, Dental crowns, Dental hard tissues, Depth resolution, Homogeneous structure, Imaging method, Lateral resolution, Micro-structural characterization, Microfractures, Noncarious cervical lesion, Occlusal forces, Occlusal overload, Tooth surface, Biomechanics, Enamels, Investments, Morphology, Stress concentration, Tissue, Tomography, Dentistry
Subjects: Q Science > QC Physics
R Medicine > R Medicine (General) > R857.O6 Optical instruments
R Medicine > RK Dentistry
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User: Giles Tarver
Date Deposited: 16 Jul 2015 14:19 UTC
Last Modified: 27 Nov 2023 14:28 UTC
Resource URI: (The current URI for this page, for reference purposes)

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