Effect of laser pulse duration on ablation efficiency of hard bone in microseconds regime

The aim of the present study is to investigate the effect of laser pulse duration on ablation efficiency of hard bones. The bones were ablated using a microsecond pulsed Er-YAG laser. The laser wavelength was 2.94 μm and the repetition rate was 10Hz. Three samples of porcine femur were used and several areas were ablated with a fixed pulse energy of 280mJ and different pulse durations. The ablation procedure was applied during five seconds for all the experiments, therefore, the same amount of energy (14 J) was deposited in each trial. The ablation efficiency was determined by measuring the ablated volume per second for each experiment.

[1]  Daniel Fried,et al.  Ablation of dental hard tissues with a microsecond pulsed carbon dioxide laser operating at 9.3-μm with an integrated scanner , 2008, SPIE BiOS.

[2]  C. S. Azevedo,et al.  15 Laser Technology for Caries Removal , 2017 .

[3]  Ming-yu Li.  Contemporary Approach to Dental Caries , 2012 .

[4]  G. Shklar,et al.  THE EFFECTS OF LASER RADIATION ON TEETH, DENTAL PULP, AND ORAL MUCOSA OF EXPERIMENTAL ANIMALS. , 1965, Oral surgery, oral medicine, and oral pathology.

[5]  S. Shapshay,et al.  Endoscopic Treatment of Subglottic and Tracheal Stenosis by Radial Laser Incision and Dilation , 1987, The Annals of otology, rhinology, and laryngology.

[6]  Stefan Stübinger,et al.  Advances in bone surgery: the Er:YAG laser in oral surgery and implant dentistry , 2010, Clinical, cosmetic and investigational dentistry.

[7]  H. K. Soong,et al.  Femtosecond lasers in ophthalmology. , 2009, American journal of ophthalmology.

[8]  Philippe C. Cattin,et al.  Effect of cooling water on ablation in Er:YAG laserosteotome of hard bone , 2017, Applications of Optics and Photonics.

[9]  S. Parker.  Surgical lasers and hard dental tissue , 2007, BDJ.

[10]  Daniel Fried,et al.  A new sealed RF-excited CO2 laser for enamel ablation operating at 9.4μm with pulse duration of 26 μs , 2016, SPIE BiOS.

[11]  K. Matsumoto,et al.  Ablation depths and morphological changes in human enamel and dentin after Er:YAG laser irradiation with or without water mist. , 1999, Journal of clinical laser medicine & surgery.

[12]  T. Kinersly,et al.  LASER EFFECTS ON TISSUE AND MATERIALS RELATED TO DENTISTRY. , 1965, Journal of the American Dental Association.

[13]  L GOLDMAN,et al.  EFFECT OF LASER BEAM IMPACTS ON TEETH. , 1965, Journal of the American Dental Association.

[14]  P. Cattin,et al.  Clinical applicability of robot-guided contact-free laser osteotomy in cranio-maxillo-facial surgery: in-vitro simulation and in-vivo surgery in minipig mandibles. , 2015, The British journal of oral & maxillofacial surgery.

[15]  C. Raulin,et al.  Laser and IPL technology in dermatology and aesthetic medicine , 2011 .

[16]  Valery V. Tuchin,et al.  Tissue Optics and Photonics: Light-Tissue Interaction , 2015 .

[17]  S. Maheshwari,et al.  Laser in dentistry: An innovative tool in modern dental practice , 2012, National journal of maxillofacial surgery.

[18]  T Albrektsson,et al.  Heat caused by drilling cortical bone. Temperature measured in vivo in patients and animals. , 1984, Acta orthopaedica Scandinavica.