Re: how do dental laser work?

The disadvantages of lasers are that:

Lasers can’t be used on teeth with fillings already in place.
Lasers can’t be used in many commonly performed dental procedures.
For example, lasers can’t be used to fill cavities located between teeth, around old fillings, and large cavities that need to be prepared for a crown.
In addition, lasers cannot be used to remove defective crowns or silver fillings, or prepare teeth for bridges.
Traditional drills may still be needed to shape the filling, adjust the bite, and polish the filling even when a laser is used.
Lasers do not eliminate the need for anesthesia.
Laser treatment tends to be more expensive since the cost of the laser is much higher than a dental drill. Lasers can cost between $39,000 and $45,000 compared to about $600 for a standard drill.