The use of a pulsed Nd : YAG laser radiation for the removal of intracanal debris and smear layer in extracted human teeth

الملخص EN

The efficiency of Nd : YAG laser radiation in removing debris and smear layer from prepared root canal walls was studied.

Fifty-seven human extracted single rooted anterior teeth were divided into three groups.

A group that was not lased is considered as a control group.

The remaining teeth were exposed to different laser parameters regarding laser energy, repetition rate and exposure time.

For the case of the set of parameters of 7 mJ laser energy, the cleaning was maximum at 3 p.p.s.

repetition rate for 3 seconds exposure time for, the coronal, middle and apical thirds.

Above and below this energy level, there was an overdose (melting) or under dose (no effect).

Nevertheless for 10mJ laser energy case, the cleaning efficiency was obvious but less than the 7 mJ case.