Best MDS Coaching AIPGDEE preparations B-IDS | Acid used for Microabrasion Technique

The acid used for Microabrasion Technique recommended by CROLL is ?
A. H2SO" 10%
B. Hcl 18%
C. Citric Acid 10%
D. None

Ans. (B)

Croll and Cavanaugh advocated a modified procedure that they called enamel color modification by controlled hydrochloric acid-pumice abrasion. Their method is that after careful tooth (teeth) Isolation with rubber dam and proper preparation have been made for safe use of the caustic agent. a slurry of firie pumice and 18% hydrochloric acid is applied under pressure and abrasion With a wooden stick. The slurry is rinsed away after each 5 second application until the desired color has occurred. After a final rinsing with water, 1 1 % neutral sodium fluoride gel is applied for 3 minutes. Next a fine fluoridated prophylaxis paste is applied With a rotating rubber cup, and finally the enamel is polished with an aluminium oxide disk.