Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.
Comparison of different focusing fiber tips for improved oral diode laser surgery†
Version of Record online: 5 NOV 2012
Copyright © 2012 Wiley Periodicals, Inc.
Lasers in Surgery and Medicine
Volume 44, Issue 10, pages 815–823, December 2012
How to Cite
Stock, K., Stegmayer, T., Graser, R., Förster, W. and Hibst, R. (2012), Comparison of different focusing fiber tips for improved oral diode laser surgery. Lasers Surg. Med., 44: 815–823. doi: 10.1002/lsm.22091
- Issue online: 21 DEC 2012
- Version of Record online: 5 NOV 2012
- Manuscript Accepted: 2 OCT 2012
- Dornier MedTech Laser GmbH
- diode laser;
- oral surgery;
- fiber tips;
- soft tissue;
- cutting efficacy
Background and Objectives
State of the art for use of the fiber guided diode laser in dental therapy is the application of bare fibers. A novel concept with delivery fiber and exchangeable fiber tips enables the use of tips with special and optimized geometries for various applications. The aim of this study is the comparison of different focusing fiber tips for enhanced cutting efficacy in oral surgery.
Material and Methods
For this purpose various designs of tip geometry were investigated and optimized by ray tracing simulations. Two applicators, one with a sphere, and another one with a taper, were realized and tested on porcine gingiva (diode laser, 940 nm, 5 W/cw; 7 W/modulated). The cutting depth and quality were determined by light microscope. Histological sections of the cuts were prepared by a cryo-microtome and microscopically analyzed to determine the cut depths and thermal damage zones.
The simulations show that, using a sphere as fiber tip, an intensity increase of up to a factor of 16.2 in air, and 13.2 in water compared to a bare 200 µm fiber can be achieved. Although offering high focusing factor in water, the cutting quality of the sphere was rather poor. This is probably caused by a derogation of the focusing quality due to contamination during cutting and light scattering. Much better results were achieved with conically shaped fiber tips. Compared to bare fibers they exhibit improved handling properties with no hooking, more regular and deeper cuts (5 W/cw: 2,393 ± 468 µm, compared to the cleaved bare fiber 5 W/cw: 711 ± 268 µm). The thermal damage zones of the cuts are comparable for the various tips and fibers.
In conclusion the results of our study show that cutting quality and efficiency of diode laser on soft tissue can be significantly improved using conically shaped fiber tips. Lasers Surg. Med. 44: 815–823, 2012. © 2012 Wiley Periodicals, Inc.