[New technic of surgical treatment of periapical lesions using carbon dioxide laser].

After briefly reviewing the use of the CO2 laser in dentistry, the authors will describe the materials and method for laser radiation after peri-apical surgery. The laser application will result in the sterilization of the apical region. The authors explain the importance of the "LASER-MIRROR" a mini contra-angle head which can maintain the integrity of the apex or minimize apical ressection while reflecting the laser beam at a 90 degree angle. Two case reports will be described and the authors will give the indications and contra-indications of their technic.