[Instrumentation of root canal walls with Nd-YAG laser].

: An in vitro study showed that it is possible to alter the surface morphology of root canals with a Nd-YAG Laser. S.E.M. and dye penetration photographs showed these changes in the canal surface morphology. In our opinion when an energy level of 15 IPS/1,5 W is used, the resulting changes are useful and of benefit in root canal treatment.