Orthodontic bracket base
FIG. 1 is a top, front, right perspective view of an orthodontic bracket base showing my new design; 
     FIG. 2 is a top plan view thereof; 
     FIG. 3 is a right side elevational view thereof, the left side being a mirror image; and, 
     FIG. 4 is a front elevational view thereof. 
     The orthodontic bracket base which is partially shown is repeated throughout the base area. 
     The broken line drawing of an orthodontic bracket is for illustrative purposes only and forms no part of the claimed design.