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Biomedical implications of dental ceramic defects investigated by numerical simulation, radiographic, microcomputer tomography and time domain optical coherence tomography

Sinescu, C., Negrutiu, M.L., Ionita, C., Marsavina, L., Negru, R., Topala, F., Petrescu, E., Rominu, R., Fabriky, M., Bradu, Adrian, and others. (2011) Biomedical implications of dental ceramic defects investigated by numerical simulation, radiographic, microcomputer tomography and time domain optical coherence tomography. In: SPIE Proceedings Series. 8172. Spie-Int Soc Optical Engineering ISBN 978-0-8194-8798-8. (doi:10.1117/12.896716) (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://dx.doi.org/10.1117/12.896716

Abstract

Imagistic investigation of the metal-ceramic crowns and fixed partial prostheses represent a very important issue in nowadays dentistry. At this time, in dental office, it is difficult or even impossible to evaluate a metal ceramic crown or bridge before setting it in the oral cavity. The possibilities of ceramic fractures are due to small fracture lines or material defects inside the esthetic layers. Material and methods: In this study 25 metal ceramic crowns and fixed partial prostheses were investigated by radiographic method (Rx), micro computer tomography (MicroCT) and optical coherence tomography (OCT) working in Time Domain, at 1300 nm. The OCT system contains two interferometers and one scanner. For each incident analysis a stuck made of 100 slices was obtain. These slices were used in order to obtain a 3D model of the ceramic interface. After detecting the presence and the positions of the ceramic defects the numerical simulation method was used to estimate the biomechanical effect of the masticatory forces on fractures propagations in ceramic materials. Results: For all the dental ceramic defects numerical simulation analysis was performed. The simulation of crack propagation shows that the crack could initiate from the upper, lower or both parts of the defect and propagates through the ceramic material where tensile stress field is present. RX and MicroCT are very powerful instruments that provide a good characterization of the dental construct. It is important to observe the reflections due to the metal infrastructure that could affect the evaluation of the metal ceramic crowns and bridges. The OCT investigations could complete the imagistic evaluation of the dental construct by offering important information when it is need it. © 2011 SPIE.

Item Type: Conference or workshop item (Proceeding)
DOI/Identification number: 10.1117/12.896716
Uncontrolled keywords: Fractures, Materials defects, Metal ceramic crowns and bridges, Micro computer tomography, Optical coherence tomography, Radiographic method, 3D models, Biomechanical effects, Ceramic defects, Dental ceramic, Fracture lines, Incident analysis, Material defect, Metal ceramic crowns and bridges, Metal infrastructure, Micro CT, Microcomputer tomography, Numerical simulation method, Oral cavity, Radiographic method, Time domain, Time domain optical coherence tomography, Biomechanics, Characterization, Computerized tomography, Crack propagation, Cracks, Dental materials, Dental prostheses, Fracture, Investments, Mathematical models, Metal working, Metals, Numerical methods, Prosthetics, Three dimensional, Time domain analysis, Tomography, Ceramic materials
Subjects: Q Science > QC Physics
R Medicine > R Medicine (General) > R857.O6 Optical coherence tomography
R Medicine > RK Dentistry
Divisions: Faculties > Sciences > School of Physical Sciences > Applied Optics Group
Depositing User: Giles Tarver
Date Deposited: 16 Jul 2015 13:18 UTC
Last Modified: 29 May 2019 14:48 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49401 (The current URI for this page, for reference purposes)
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