Safety of the ArF193 excimer laser for the removal of dental plaque and calculi: An in vitro histological study

Objective: To assay the safety of the ArF excimer laser in the integrity of human pulp elements. Background Data: The use of lasers in dentistry remai ns controversial, in spite of their increasing application in medical pract ice. The main reason for this discrepancy is the frequent report of damage to surrounding tissues and the dental pulp, due to the energy transfer, fro m the site of laser impact. The progress made on laser technology during th e last 10 years, could overcome this obstacle and allow the use of lasers i n dentistry. Methods and Results: The present study reports the use of the ArF 193 excimer laser, under conditions of strict control of frequency and fluency, for the ablation of dental carries, plaque, and calculi, by the us e of a new, articulated arm. We have tested 10 teeth, extracted for prosthe tic reasons, immediately after extraction. Our in vitro results show that t he ArF193 excimer laser does not produce any harm to, the dental pulp (at l east at the photo- or electronic microscopy level), whereas in a matter of seconds, it can be effective in removing all dental deposits. In addition, the use of the flexible articulated arm, makes this treatment comfortable a nd easier for both the dentist and patient. Conclusions: Under a strict con trol of laser technology, and the use of the new articulated arm presented, the use of the ArF excimer laser in dentistry is safe and comfortable.