Laser-tissue interaction of pump-probe elastography (PPE) on human teeth

F. Wäger; C. Freymüller; F. Müller; J. Jörissen; S. Kiderlen; M. Domke; S. Rink-Notzon; A. Liebermann; F. Dohnal; A. Buchner; H. Huber; R. Sroka

doi:10.1117/12.3009502

12 March 2024 Laser-tissue interaction of pump-probe elastography (PPE) on human teeth

F. Wäger, C. Freymüller, F. Müller, J. Jörissen, S. Kiderlen, M. Domke, S. Rink-Notzon, A. Liebermann, F. Dohnal, A. Buchner, H. Huber, R. Sroka

Author Affiliations +

Proceedings Volume 12844, Optical Elastography and Tissue Biomechanics XI; 128440G (2024) https://doi.org/10.1117/12.3009502
Event: SPIE BiOS, 2024, San Francisco, California, United States

Conference Poster

Abstract

The utilization of lasers in dentistry expands greatly in recent years. For instance, fs-lasers are effective for both drilling and caries prevention, while cw-lasers are useful for adhesive hardening. A cutting-edge application of lasers in dentistry is the debonding of veneers. While there are pre-existing tools for this purpose, there is still potential for improvement. Initial efforts to investigate laser assisted debonding mechanisms with measurements of the optical and mechanical properties of teeth and prosthetic ceramics are presented. Preliminary tests conducted with a laser system used for debonding that is commercially available showed differences in the output power set at the systems console to that at specified distances from the handpiece. Furthermore, the optical properties of the samples (human teeth and ceramics) were characterised. The optical properties of the ceramics should closely resemble those of teeth in terms of look and feel, but they also influence the laser assisted debonding technique and thus must be taken into account. In addition first attempts were performed to investigate the mechanical properties of the samples by means of pump-probe-elastography under a microscope. By analyzing the sample surface up to 20 ns after a fs-laser pulse impact, pressure and shock waves could be detected, which can be utilized to determine the elastic constants of specific materials. Together such investigations are needed to shape the basis for a purely optical approach of debonding of veneers utilizing acoustic waves.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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F. Wäger, C. Freymüller, F. Müller, J. Jörissen, S. Kiderlen, M. Domke, S. Rink-Notzon, A. Liebermann, F. Dohnal, A. Buchner, H. Huber, and R. Sroka "Laser-tissue interaction of pump-probe elastography (PPE) on human teeth", Proc. SPIE 12844, Optical Elastography and Tissue Biomechanics XI, 128440G (12 March 2024); https://doi.org/10.1117/12.3009502

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