Romanian Biotechnological Letters Vol. 23, No. 6, 2018 Copyright © 2018 University of Bucharest Printed in Romania. All rights reserved ORIGINAL PAPER Romanian Biotechnological Letters, Vol. 23, No. 6, 2018 14107 Laser’s applications in minimally invasive dental procedures – new trends in modern dentistry DOI: 10.26327/RBL2017.77 Received for publication, July, 2, 2017 Accepted, October, 20, 2017 M. MELEȘCANU IMRE 1 , A. CELIBIDACHE 4 , A.M.C. ȚÂNCU 1 , M. PANTEA 2 , I. SUCIU 3 , P. PERLEA 3 1 Department of Prosthodontics – Complete Dentures, Faculty of Dentistry,” Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania 2 Department of Prosthodontics – Fixed Prosthodontics and Occlusology, Faculty of Dentistry,” Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania 3 Department of Endodontics – Faculty of Dentistry,” Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania 4 Private practice, Romania Corresponding author: A.M.C. Țâncu: amctancu@yahoo.com / +40722664355 Abstract The present paper highlights the multiple uses and advantages of dental lasers in modern dentistry. Especially developed for this medical field, dental lasers are surgical and therapeutic high technology devices, which are increasingly used in the daily dentists’ practice. The dental lasers use four classes of wavelengths which are absorbed in soft or hard tissues, thus providing precise tissue specificity. They are used at a large scale thanks to their minimally invasive particularity. In this context, the present paper presents three clinical cases in which dental lasers are applied using different laser light power, exposure time and absorption of the wavelengths in soft or hard tissues thus highlighting the benefits for every presented case. Key words: lasers, minimally invasive procedures, advanced dental treatment 1. Introduction Modern dentistry is minimally invasive; the use of dental lasers successfully contributes to reaching this aim. The popularity of dental lasers has grown a lot in the last few years and the advantages of laser therapy became well known in the area of dentistry, as scientific literature reports its benefits and, also, as courses in the field of dental lasers for undergraduate and postgraduate programs are organized. Modern dental lasers, developed exclusively for this field, are therapeutic and surgical devices that can be used in periodontology, implantology, prosthodontics, restorative odontology, endodontics, oromaxillary surgery, pedodontics, orthodontics. The current paper presents clinical aspects related to the use of lasers in modern dentistry, highlighting the advantages of these procedures. 2. Materials and method Lasers has multiple and various applications in nowadays dentistry; differences between procedures depend on the laser light power and the exposure time of the oral tissues, but also on the absorption of the wavelengths in soft or hard tissues. Laser light has four types of interaction with the targeted tissues which depends on the optical properties of that specific tissue – absorption, transmission of laser energy, reflection, scattering of the laser energy. Lasers are divided in four big classes of wavelengths that are used in dentistry, under different