Carlo Fornaini1,2, Elisabetta Merigo2, Federica Poli1, Chiara Cavatorta3, Jean-Paul Rocca3, Stefano Selleri1, Annamaria Cucinotta1. 1. Department of Engineering and Architecture, University of Parma, Parco Area delle Scienze 181/A, 43124 Parma, Italy. 2. Micoralis Laboratory, Faculty of Dentistry, University of Cote d'Azur, 24 Avenue des Diables Bleus, 06357 Nice, France. 3. Section of Pathologic Anatomy, University Clinic Policlinico of Modena, Via del Pozzo 71 - 41124 Modena, Italy.
Abstract
BACKGROUND AND AIMS: The aim of this ex vivo study was to demonstrate the performances of 1070 nm fiber lasers for the ablation of oral tissues through the evaluation of the histological modifications made by a blind pathologist and the measurement of the thermal elevation during laser irradiation by a sensor based on a fiber Bragg grating. MATERIALS AND METHODS: The source used was a pulsed fiber laser emitting at 1070 nm, with 20 W maximum average output power and 100 ns fixed pulse duration. Different tests were performed by changing the laser parameters, particularly the peak power of the pulses and the repetition rate. RESULTS: The tissue of the measurements demonstrated that the best properties in term of cutting capability and, at the same time, the lower thermal damages to the tissues can be obtained with a peak power of 3 kW, a repetition rate of 50 kHz and a speed of 5 mm/s. CONCLUSIONS: This ex vivo study showed that 1070 nm fiber lasers can be very useful in oral surgery, since they provide a reduced thermal elevation in the irradiated tissues, thus consequently respecting their biological structures. Moreover, this work demonstrates that FBG sensors, based on the optical fiber technology as the laser source considered for the tests, may be good instruments to record thermal elevation when applied to the ex vivo studies on animal models.
BACKGROUND AND AIMS: The aim of this ex vivo study was to demonstrate the performances of 1070 nm fiber lasers for the ablation of oral tissues through the evaluation of the histological modifications made by a blind pathologist and the measurement of the thermal elevation during laser irradiation by a sensor based on a fiber Bragg grating. MATERIALS AND METHODS: The source used was a pulsed fiber laser emitting at 1070 nm, with 20 W maximum average output power and 100 ns fixed pulse duration. Different tests were performed by changing the laser parameters, particularly the peak power of the pulses and the repetition rate. RESULTS: The tissue of the measurements demonstrated that the best properties in term of cutting capability and, at the same time, the lower thermal damages to the tissues can be obtained with a peak power of 3 kW, a repetition rate of 50 kHz and a speed of 5 mm/s. CONCLUSIONS: This ex vivo study showed that 1070 nm fiber lasers can be very useful in oral surgery, since they provide a reduced thermal elevation in the irradiated tissues, thus consequently respecting their biological structures. Moreover, this work demonstrates that FBG sensors, based on the optical fiber technology as the laser source considered for the tests, may be good instruments to record thermal elevation when applied to the ex vivo studies on animal models.
Authors: Edward V Ross; Joseph R McKinlay; Francis P Sajben; Charles H Miller; David J Barnette; Kenneth J Meehan; Norak P Chhieng; Mickey J Deavers; Brian D Zelickson Journal: Lasers Surg Med Date: 2002 Impact factor: 4.025
Authors: Fernanda H Sakamoto; Apostolos G Doukas; William A Farinelli; Zeina Tannous; Michelle Shinn; Steve Benson; Gwyn P Williams; Joseph F Gubeli; H Frederick Dylla; R Rox Anderson Journal: Lasers Surg Med Date: 2011-12-13 Impact factor: 4.025