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Integral ceramic superstructure evaluation using time domain optical coherence tomography

Sinescu, Cosmin and Bradu, Adrian and Topala, Florin Ionel and Negrutiu, Meda Lavinia and Duma, Virgil-Florin and Podoleanu, Adrian Gh. (2014) Integral ceramic superstructure evaluation using time domain optical coherence tomography. In: Lasers in Dentistry XX. Proceedings of SPIE . SPIE. ISBN 978-0-8194-9842-7. (doi:10.1117/12.2039618) (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)

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. (Contact us about this Publication)
Official URL
http://www.dx.doi.org/10.1117/12.2039618

Abstract

Optical Coherence Tomography (OCT) is a non-invasive low coherence interferometry technique that includes several technologies (and the corresponding devices and components), such as illumination and detection, interferometry, scanning, adaptive optics, microscopy and endoscopy. From its large area of applications, we consider in this paper a critical aspect in dentistry - to be investigated with a Time Domain (TD) OCT system. The clinical situation of an edentulous mandible is considered; it can be solved by inserting 2 to 6 implants. On these implants a mesostructure will be manufactured and on it a superstructure is needed. This superstructure can be integral ceramic; in this case materials defects could be trapped inside the ceramic layers and those defects could lead to fractures of the entire superstructure. In this paper we demonstrate that a TD-OCT imaging system has the potential to properly evaluate the presence of the defects inside the ceramic layers and those defects can be fixed before inserting the prosthesis inside the oral cavity. Three integral ceramic superstructures were developed by using a CAD/CAM technology. After the milling, the ceramic layers were applied on the core. All the three samples were evaluated by a TD-OCT system working at 1300 nm. For two of the superstructures evaluated, no defects were found in the most stressed areas. The third superstructure presented four ceramic defects in the mentioned areas. Because of those defects the superstructure may fracture. The integral ceramic prosthesis was send back to the dental laboratory to fix the problems related to the material defects found. Thus, TD-OCT proved to be a valuable method for diagnosing the ceramic defects inside the integral ceramic superstructures in order to prevent fractures at this level.

Item Type: Book section
DOI/Identification number: 10.1117/12.2039618
Additional information: Unmapped bibliographic data: C7 - 89290N [EPrints field already has value set] LA - English [Field not mapped to EPrints] J2 - Progr. Biomed. Opt. Imaging Proc. SPIE [Field not mapped to EPrints] AD - School of Dentistry, Victor Babes University of Medicine and Pharmacy of Timisoara, 2 Eftimie Murgu Place, Timisoara 300041, Romania [Field not mapped to EPrints] AD - Applied Optics Group, University of Kent, Canterbury, CT2 7NH, United Kingdom [Field not mapped to EPrints] AD - 3OM Optomechatronics Group, Aurel Vlaicu University of Arad, 77 Revolutiei Ave., Arad 310130, Romania [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints] A4 - The Society of Photo-Optical Instrumentation Engineers (SPIE) [Field not mapped to EPrints] C3 - Progress in Biomedical Optics and Imaging - Proceedings of SPIE [Field not mapped to EPrints]
Uncontrolled keywords: Defects, Dentistry, Fracture, Interferometry, Optical tomography, Prosthetics, Ceramic defects, Ceramic prosthesis, Clinical situations, Devices and components, Low coherence interferometry, Material defect, Mesostructures, Time domain optical coherence tomography, Ceramic materials
Subjects: Q Science > QC Physics
R Medicine > R Medicine (General) > R857.O6 Optical coherence tomography
Divisions: Faculties > Sciences > School of Physical Sciences > Applied Optics Group
Depositing User: Giles Tarver
Date Deposited: 15 Jul 2015 08:53 UTC
Last Modified: 26 Jul 2019 09:19 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49311 (The current URI for this page, for reference purposes)
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