head JofIMAB
Journal of IMAB - Annual Proceeding (Scientific Papers)
Publisher: Peytchinski Publishing Ltd.
ISSN: 1312-773X (Online)
Issue: 2021, vol. 27, issue1
Subject Area: Dental Medicine
DOI: 10.5272/jimab.2021271.3523
Published online: 15 January 2021

Original article

J of IMAB. 2021 Jan-Mar;27(1):3523-3528
Raya Grozdanova-UzunovaORCID logo, Elka RadevaORCID logo Corresponding Autoremail, Dimitar KosturkovORCID logo, Evgeniya PopovaORCID logo, Tsonko UzunovORCID logo,
Department of Conservative Dentistry, Faculty of Dental Medicine, Medical University, Sofia, Bulgaria.

Purpose: The aim of our in vitro study is to investigate the thermal changes on the outer root surface that occur after irradiation with a high intensive diode laser with two types of optical fibers.
Material and Methods: The root canals of 24 extracted single-rooted and multi-rooted teeth (59 root canals) were prepared with Pro Taper Gold to F3 and treated with 810 nm diode laser for 8 s with circular movements from apex to orifices. Teeth are divided into two groups. A quartz light guide is used in the first group, and in the second group, the root canals are treated with an organically modified quartz light guide. The temperature changes were detected with FLIR - Т 330 Infrared Thermal Camera and the data was processed with FLIR Reporter 9 Professional software.
Results: In 90% of cases, the temperature rise on the outer root surface is up to 8°C. In the first group with quartz fiber, the minimum increase in temperature is 2°C, the maximum is 11°C (in the cases with four root canals). When using the organically modified quartz fiber, the registered minimum increase in temperature is 1.2°C and maximum increase of 9.2°C (in cases with curved canals).
Conclusion: Temperature changes on the outer root surface using an 810 nm diode laser are biocompatible. There is no statistically significant difference between the temperatures measured in the two types of optical fibers used - quartz and organically modified quartz light.

Keywords: diode laser, light guide, outer root surface, thermal changes,

pdf - Download FULL TEXT /PDF 3511 KB/
Please cite this article as: Grozdanova-Uzunova R, Radeva E, Kosturkov D, Popova E, Uzunov T. Comparative study of the thermal effect of two kinds of optic fibres of high intensive 810 nm diode laser (in vitro study). J of IMAB. 2021 Jan-Mar;27(1):3523-3528. DOI: 10.5272/jimab.2021271.3523

Corresponding AutorCorrespondence to: Assoc. Prof. Elka Radeva, DMD, PhD., Department of Conservative Dentistry, Faculty of Dental Medicine, Medical University – Sofia; 1, St. Georgi Sofijski Str., 1431 Sofia, Bulgaria; E-mail: eliradeva@abv.bg

1. Convissar RA. Principles and Practice of Laser Dentistry. 2nd Edition. Mosby. 2015. Laser fundamentals, pp.14-20. [Internet]
2. Valente NA,Mang T, Hatton M, Mikulski L, Andreana S. Effects of Two Diode Lasers With and Without Photosensitization on Contaminated Implant Surfaces: An Ex Vivo Study. Photomed Laser Surg. 2017 Jul;35(7):347-356. [PubMed] [Crossref]
3. Coluzzi DJ, Convissar RA. Atlas of Laser Applications in Dentistry. 1st Edition. Quintessence Pub Co. January 30, 2007. pp.1-7.
4. Renk KF. Basics of Laser Physics. For Students of Science and Engineering. Springer, Berlin, Heidelberg. 2012.Laser principle, 17-35 p. [Crossref]
5. Saydjari Y, Kuypers T, Gutknecht N. Laser Application in Dentistry: Irradiation Effects of Nd:YAG 1064 nm and Diode 810 nm and 980 nm in Infected Root Canals-A Literature Overview. Biomed Res Int. 2016;2016:8421656. [PubMed ] [Crossref ]
6. Al-Karadaghi TS, Gutknecht N, Jawad HA, Vanweersch L, Franzen R. Evaluation of Temperature Elevation During Root Canal Treatment with Dual Wavelength Laser: 2780 nm Er,Cr:YSGG and 940 nm Diode. Photomed Laser Surg. 2015 Sep;33(9):460-6. [PubMed ] [Crossref ]
7. Beer F, Farmakis ET, Kopic J, Kurzmann C, Moritz A. Temperature Development on the External Root Surface During Laser-Assisted Endodontic Treatment Applying a Microchopped Mode of a 980 nm Diode Laser. Photomed Laser Surg. 2017 Apr;35(4):206-212. [PubMed ] [Crossref ]
8. El-Zohairy A, Serageldin RF. Synopsis is Using Dental Diode Laser in Endodontic. EC Dental Science. 2016 Nov; 5(4):1139-1144. [Internet ]
9.Haidary D, Franzen R, Gutknecht N. Root Surface Temperature Changes During Root Canal Laser Irradiation with Dual Wavelength Laser (940 and 2780 nm): A Preliminary Study.Photomed Laser Surg.2016 Aug;34(8):336-44. [PubMed ] ]Crossref ]
10. George R, Walsh LJ. Laser Fiber-optic Modifications and Their Role in Endodontics. J Laser Dent. 2012; 20(1):24-30.
11. Moritz A, Schoop U. Lasers in Endodontics. In: Oral Laser Application. Moritz A. (Ed.) 1st Edition. Quintessence Publishing, Germany. 2006. Chapter 06. pp.241-313.
12. Alfredo E, Marchesan  MA, Sousa-Neto MD, Brugnera-Junior A, Silva-Sousa YTC. Temperature variation at the external root surface during 980-nm diode laser irradiation in the root canal. J Dent. 2008 Jul;36(7):529-34. [PubMed] [Crossref]
13. Todea CDM. Laser application in conservative dentistry. TMJ. 2004; 54(4):392-405.
14. Moritz A, Gutknecht N, Goharkhay K, Schoop U, Wernisch J, Sperr W. In vitro irradiation of infected root canals with a diode laser: Results of microbiologic, infrared spectrometric, and stain penetration examinations. Quintessence Int. 1997 Mar;28(3):205-9. [PubMed ]
15. Grozdanova R. [Thermodiagnostics of focal infection in the maxillo-facial region.] [Disertation] Medical University, Sofia, Bulgaria. 2012. pp.191-209. [in Bulgarian]
16. da Costa Ribeiro A, Nogueira GE, Antoniazzi JH, Moritz A, Zezell DM. Effects of diode laser (810 nm) irradiation on root canal walls: thermographic and morphological studies. J Endod. 2007 Mar;33(3):252-5. [PubMed ] [Crossref ]
17. Gutknecht N, Franzen R, Meister J, Vanweersch L, Mir M. Temperature evolution on human teeth root surface after diode laser assisted endodontic treatment. Lasers Med Sci. 2005 Sep;20(2):99-103. [PubMed] [Crossref]
18. Gutknecht N. Lasers in Endodontics. J Laser Health Academy. 2008; No.4:1-4.
19. Coluzzi DJ. Fundamentals of Lasers in Dentistry: Basic Science, Tissue Interaction, and Instrumentation. J Laser Dent. 2008; 16(Spec. issue):4-10.
20. Valente NA, Calascibetta A, Patianna G, Mang T, Hatton M, Andreana S.. Thermodynamic Effects of 3 Different Diode Lasers on an Implant-Bone Interface: An Ex-Vivo Study With Review of the Literature. J Oral Implantol. 2017 Apr;43(2):94-99. [PubMed] [Crossref].

Received: 26 September 2019
Published online: 15 January 2021

back to Online Journal