Objective: To evaluate the effectiveness a toothpaste for polishing enamel after teeth scaling. Methods: The roots of five newly extracted upper incisors were removed and each crown was cut longitudinally and latitudinally though the labial center so that 21 enamel specimens were obtained. All enamel specimens were invested in self-curing resin and the enamel surfaces were exposured and polishing with 400#~2000# wet sand papers to get standard surfaces. Enamel specimens were assigned to seven groups of three each. Control group: no treatment; group 1: enamel surfaces were treated with standard ultrasonic scaling; group 2: ultrasonic scaling+polishing with prophylaxis polishing paste(NUPRO); group3: ultrasonic scaling+polishing with a toothpaste (Crest); group 4: sandblast scaling; group 5: sandblast scaling + polishing with prophylaxis polishing paste(NUPRO); group 6: sandblast scaling + polishing with a toothpaste(Crest). After treatment, all specimens were observed under SEM and then the surface roughness (Ra, mm) of each specimen were made using a surface profilometer. Results: The roughest enamel surface was obtained in ultrasonic scaling group, followed by sandblast scaling group, ultrasonic scaling+polishing with NUPRO group, ultrasonic scaling+polishing with Crest group, sandblast scaling + polishing with NUPRO group and sandblast scaling + polishing with Crest group in sequence.Conclusion: Ultrasonic scaling could creat a much rougher enamel surface than sandblast scaling; polishing with prophylaxis polishing paste or toothpaste could decrease the roughness and toothpaste is a more effectual polishing paste.