THE PRESENT INVENTION IS DIRECTED TO ORAL COMPOSITIONS COMPRISING AN ORALLY- ACCEPTABLE CARRIER AND A SILICA ABRASIVE COMPRISING A PRECIPITATED AMORPHOUS SILICA COMPOUND HAVING AN AVERAGE PARTICLE SIZE OF FROM 5 μm TO 20 μm, OIL ABSORPTION OF FROM 60 CC/100 G TO 120 CC/100 G, AND AN EINLEHNER HARDNESS OF FROM 4 TO 11, AND METHODS OF USE THEREOF