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

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Bibliographic Details
Title:	Sensor-based laser ablation for tissue specific cutting: an experimental study.
Authors:	Rupprecht, Stephan¹ stephan.rupprecht@mkg.imed.uni-erlangen.de, Tangermann-Gerk, Katja², Wiltfang, Joerg¹, Neukam, Friedrich¹, Schlegel, Andreas¹, Neukam, Friedrich Wilhelm (AUTHOR)
Source:	Lasers in Medical Science. Sep2004, Vol. 19 Issue 2, p81-88. 8p.
Subjects:	Lasers, Tissues -- Models, Medical lasers, Tomography, Medical radiography, Medical sciences, Mandible surgery, Animal experimentation, Comparative studies, Computed tomography, Research methodology, Medical cooperation, Osteotomy, Research, Signal processing, Swine, Three-dimensional imaging, Evaluation research, Equipment & supplies
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. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
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. [ABSTRACT FROM AUTHOR]
ISSN:	02688921
DOI:	10.1007/s10103-004-0301-2