| 摘要 |
A dental prophylaxis angle of the snap-on variety comprising two interlocking external parts and 2 internal parts, wherein the base for the mandrel or button formation resembling a knob which arises from the rotary bearing, known as a slinger ring or disk or annular stop, designed to receive the conventional snap-on rubber-like prophylaxis cup, has a plurality of sharp pointed projections or prongs to safely grip and stabilize the engagement of a snap-on prophylaxis cup.
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