The ornamental design for an oralretractor for dentalpurpose, as shown and described.
FIG. 1 is a perspective view of an oral retractor for dental purpose showing my/our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof, the right side being a mirror image;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is an enlarged front elevational view of a portion of the oral retractor within the dot-dash broken circle identified as “A” in the FIG. 2 view.