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Sensor-based laser ablation for tissue specific cutting: an experimental study

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Abstract

The interaction of laser light and tissue causes measurable phenomenons. These phenomenons can be quantified and used to control the laser drilling within a feedback system. Ten halves of dissected minipig jaws were treated with an Er:YAG laser system controlled via a feedback system. Sensor outputs were recorded and analyzed while osteotomy was done. The relative depth of laser ablation was calculated by 3D computed tomography and evaluated histologically. The detected signals caused by the laser–tissue interaction changed their character in a dramatic way after passing the cortical bone layer. The radiological evaluation of 98 laser-ablated holes in the ten halves showed no deeper ablation beyond the cortical layer (mean values: 97.8%). Histologically, no physical damage to the alveolar nerve bundle was proved. The feedback system to control the laser drilling was working exactly for cortical ablation of the bone based on the evaluation of detected and quantified phenomenon related to the laser–tissue interaction.

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Acknowledgements

The sensor-controlled laser is an interdisciplinary project funded by the VW-Stiftung (AZ: I/73 770, 773-775).

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Authors and Affiliations

  1. Department of oral and Maxillofacial Surgery, University Erlangen-Nuremberg, Glueck str. 11, 91054, Erlangen, Germany

    Stephan Rupprecht, Joerg Wiltfang, Friedrich Wilhelm Neukam & Andreas Schlegel

  2. Bayerisches Laserzentrum gGmbH, Erlangen, Germany

    Katja Tangermann-Gerk

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  1. Stephan Rupprecht
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  2. Katja Tangermann-Gerk
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  3. Joerg Wiltfang
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  4. Friedrich Wilhelm Neukam
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  5. Andreas Schlegel
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Correspondence to Stephan Rupprecht.

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Rupprecht, S., Tangermann-Gerk, K., Wiltfang, J. et al. Sensor-based laser ablation for tissue specific cutting: an experimental study. Lasers Med Sci 19, 81–88 (2004). https://doi.org/10.1007/s10103-004-0301-2

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  • DOI: https://doi.org/10.1007/s10103-004-0301-2

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