Optical Fiber Lightening for Fluorescence Signal Detection with Thermal Stability in Dentistry

Joo Beom Eom, In Hee Shin, Hyeong Ju Park, Byeong-Il Lee

Bio-Photonics Research Center, Korea Photonics Technology Institute, Gwangju, Korea.

DOI: 10.4236/jbise.2015.83019                

Abstract

Dental caries diagnosis system has been made with a fiber lighting, camera module and band pass filter. By simply aligning a 405 nm LED (Light Emitting diode) chips directly connected polymer fibers, a compact lighting for dental fluorescence imaging could be implemented. Special designed fiber holder with proper hole diameter was fabricated to directly connect polymer fibers with 1 mm fiber diameter and increased coupling efficiency between fibers and LEDs. Fibers connected to fiber holder were polished by polishing machine to reduce insertion loss of the fiber. Experimentally, an optical insertion loss of the fiber bundle of up to 0.8 dB was achieved. Further, LED array module was packaged with equally spaced LED chips with fiber holder on metal. Fiber lightening was fabricated with directly coupled between LED array module and fiber bundle by UV epoxy without focusing lens in order to lower the lightening temperature of intraoral camera in the human mouth. The measured temperature of fabricated fiber lightening was about 25 degree celcius. To achieve a fluorescence image and dental caries diagnosis, the proper optical filter, camera module, 405 nm fiber bundle lighting and software were investigated. The performance of the fluorescence intraoral camera with fiber lightening is confirmed by fluorescence image of human tooth.

Keywords

Fluorescence, LEDs, Dental Caries, Fiber Lightening

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	de Paula, A.B., Campos, J.A., Diniz, M.B., Hebling, J. and Rodrigues, J.A. (2011) In Situ and In Vitro Comparison of Laser Fluorescence with Visual Inspection in Detecting Occlusal Caries Lesions. Lasers in Medical Science, 26, 1-5. http://dx.doi.org/10.1007/s10103-009-0731-y
[2]	Bader, J.D. and Shugars, D.A. (2004) A Systematic Review of the Performance of a Laser Fluorescence Device for Detecting. Journal of the American Dental Association, 135, 1413-1426.
[3]	Amaechi, B.T. (2009) Emerging Technologies for Diagnosis of Dental Caries: The Road So Far. Journal of Applied Physics, 105, Article ID: 102047. http://dx.doi.org/10.1063/1.3116632
[4]	Stookey, G.K., Isaacs, R.L., Zandona, A.G.F., Ando, M., Gonzalez, C., Mau, M.S., Kelly, S.A. and Analoui, M. (1999) Clinical Validation of the Use of Fluorescence for the Early Detection of Dental Caries. Proceeding of SPIE 3593, Lasers in Dentistry V, 154. http://dx.doi.org/10.1117/12.348343
[5]	Pretty, I.A. (2006) Caries Detection and Diagnosis: Novel Technologies. Journal of Dentistry, 34, 727-739. http://dx.doi.org/10.1016/j.jdent.2006.06.001
[6]	Ando, M., Hall, A.F., Eckert, G.J., Schemehorn, B.R., Analoui, M. and Stookey, G.K. (1997) Relative Ability of Laser Fluorescence Techniques to Quantitate Early Mineral Loss in Vitro. Caries Research, 31, 125-131. http://dx.doi.org/10.1159/000262387
[7]	Lussi, A., Imwinkelried, S., Pitts, N., Longbottom, C. and Reich, E. (1999) Performance and Reproducibility of a Laser Fluorescence System for Detection of Occlusal Caries in Vitro. Caries Research, 33, 261-266. http://dx.doi.org/10.1159/000016527
[8]	Qin, Y.L., Luan, X.L., Bi, L.J., Lü, Z., Sheng, Y.Q., Somesfalean, G., Zhou, C.N. and Zhang, Z.G. (2007) Real-Time Detection of Dental Calculus by Blue-LED-Induced Fluorescence Spectroscopy. Journal of Photochemistry and Photobiology B: Biology, 87, 88-94.
[9]	Amaechi, B.T., Chedjieu, I. and Loza-no-Pineda, J. (2013) Clinical Evaluation of an Enhanced White Light and Fluorescence Device for Early Detection of Caries Lesions. The Journal of Clinical Dentistry, 24, 43-48.
[10]	McGrady, M.G., Ellwood, R.P., Taylor, A., Maguire, A., Good-win, M., Boothman, N. and Pretty, I.A. (2012) Evaluating the Use of Fluorescent Imaging for the Quantification of Dental Fluorosis. BMC Oral Health, 12, 47.
[11]	Hibst, R., Paulus, R. and Lussi, A. (2001) Detection of Occlusal Caries by Laser Fluorescence: Basic and Clinical Investigations. Medical Laser Application, 16, 205-213. http://dx.doi.org/10.1078/1615-1615-00024
[12]	Zezell, D.M., Ribeiro, A.C., Bachmann, L., Gomes, A.S., Rousseau, C. and Girkin, J. (2007) Characterization of Natural Carious Lesions by Fluorescence Spectroscopy at 405-nm Excitation Wavelength. Journal of Biomedical Optics, 12, Article ID: 064013.
[13]	Buchalla, W., Lennon, A.M. and Attin, T. (2004) Comparative Fluorescence Spectroscopy of Root Caries Lesions. European Journal of Oral Sciences, 112, 490-496.