Holographic interferometric and correlation-based laser speckle metrology for 3D deformations in dentistry

Markus Dekiff; Björn Kemper; Elke Kröger; Cornelia Denz; Dieter Dirksen

doi:10.1117/12.2252307

6 April 2017 Holographic interferometric and correlation-based laser speckle metrology for 3D deformations in dentistry

Markus Dekiff, Björn Kemper, Elke Kröger, Cornelia Denz, Dieter Dirksen

Proceedings Volume 10127, Practical Holography XXXI: Materials and Applications; 101270B (2017) https://doi.org/10.1117/12.2252307
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

The mechanical loading of dental restorations and hard tissue is often investigated numerically. For validation and optimization of such simulations, comparisons with measured deformations are essential. We combine digital holographic interferometry and digital speckle photography for the determination of microscopic deformations with a photogrammetric method that is based on digital image correlation of a projected laser speckle pattern. This multimodal workstation allows the simultaneous acquisition of the specimen’s macroscopic 3D shape and thus a quantitative comparison of measured deformations with simulation data. In order to demonstrate the feasibility of our system, two applications are presented: the quantitative determination of (1) the deformation of a mandible model due to mechanical loading of an inserted dental implant and of (2) the deformation of a (dental) bridge model under mechanical loading. The results were compared with data from finite element analyses of the investigated applications. The experimental results showed close agreement with those of the simulations.

Citation Download Citation

Markus Dekiff, Björn Kemper, Elke Kröger, Cornelia Denz, and Dieter Dirksen "Holographic interferometric and correlation-based laser speckle metrology for 3D deformations in dentistry", Proc. SPIE 10127, Practical Holography XXXI: Materials and Applications, 101270B (6 April 2017); https://doi.org/10.1117/12.2252307

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