We offer two versions of esa disposable prophy angles: esa MW which works with Midwest®, Shorty®, and Midwest Rhino® motors and esa ST which works with the DentalEZ Star Titan® motor. These motors were chosen based on their having the largest installed base of users in the U. S. Dental Market at esa DPA’s introduction in 2000. At that time it was estimated that these 3 motors were used in approximately 50% of the dental offices in the U.S.