We claim the ornamental design for a dental laser device, as shown.
FIG. 1 is a front and top perspective view of a dental laser device showing our new design;
FIG. 2 is a back view thereof;
FIG. 3 is a left front side perspective view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a is a top view thereof, the dental laser device being tilted slightly forwardly to show a portion of the back side;
FIG. 7 is a front elevational view thereof; and,
FIG. 8 is a bottom view thereof.
The broken line showing portions of a dental laser device is included for the purpose of illustrating environmental structure and forms no part of the claimed design.