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Proceedings Paper

Biomedical implications of dental-ceramic defects investigated by numerical simulation, radiographic, microcomputer tomography, and time-domain optical coherence tomography
Author(s): Cosmin Sinescu; Meda Lavinia Negrutiu; Ciprian Ionita; Liviu Marsavina; Radu Negru; Florin Topala; Emanuela Petrescu; Roxana Rominu; Mihai Fabriky; Adrian Bradu; Mihai Rominu; Adrian Gh. Podoleanu
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Paper 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.

Paper Details

Date Published: 30 September 2011
PDF: 5 pages
Proc. SPIE 8172, Optical Complex Systems: OCS11, 817207 (30 September 2011); doi: 10.1117/12.896716
Show Author Affiliations
Cosmin Sinescu, Victor Babes Univ. of Medicine and Pharmacy of Timisoara (Romania)
Meda Lavinia Negrutiu, Victor Babes Univ. of Medicine and Pharmacy of Timisoara (Romania)
Ciprian Ionita, State Univ. of New York at Buffalo (United States)
Liviu Marsavina, Politehnica Univ. of Timisoara (Romania)
Radu Negru, Politehnica Univ. of Timisoara (Romania)
Florin Topala, Victor Babes Univ. of Medicine and Pharmacy of Timisoara (Romania)
Emanuela Petrescu, Victor Babes Univ. of Medicine and Pharmacy of Timisoara (Romania)
Roxana Rominu, Victor Babes Univ. of Medicine and Pharmacy of Timisoara (Romania)
Mihai Fabriky, Victor Babes Univ. of Medicine and Pharmacy of Timisoara (Romania)
Adrian Bradu, Univ. of Kent (United Kingdom)
Mihai Rominu, Victor Babes Univ. of Medicine and Pharmacy of Timisoara (Romania)
Adrian Gh. Podoleanu, Univ. of Kent (United Kingdom)


Published in SPIE Proceedings Vol. 8172:
Optical Complex Systems: OCS11
Gérard Berginc, Editor(s)

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