Hi...Root canal treatment  has different techniques and cost varies accordingly. I think skills , experience and technology all are important factors.Practically painless root canal is a minimum discomfort procedure and not absolute painless.

Laser treatment in Dentistry predominantly is for soft tissues. Hard tissue laser is usually required for access opening in root canal treatment which is quite time consuming. For Root canal treatment, laser can be used for canal disinfection but still instruments are required for complete removal of infection and finally tooth needs to be filled with suitable material. Root canal treatment with the help of microscope is the latest cutting edge technology and ensures complete treatment.

In fact painless Dentistry is practiced today at most clinic. We too do painless Dentistry. The Root canal procedures are less cumbersome than years before and we use Rotary Endodontics which is the latest technology in which the patients are treated in a single appointment unless any other complications arise.