Per Stedman's
quote:
curet SEE curettecurette, curet - Instrument in the form of a loop, ring or scoop with sharpened edges attached to a rod-shaped handle, used for curettage
I have always spelled it as curette. IMHO, be consistent. Use one or the other -- using your own preference, unless your client/service has one of their own. Either is acceptable, but I wouldn't interchange them.
Annie