V.M.
I have a great dentist in Barrington who is very gentle and great with my kids. (6yrs and 8 yrs). His name is Dr. Steltenpohl and his office is right on Rt. 14 just as you are coming into Barrington from the west.
527 Old Northwest Hwy
Ste 104
Barrington, IL 60010
Phone: ###-###-####
I don't know about the laser to detect cavities, you could always ask.
Good luck, have a great summer.