Dental General ef512b62 Microsbrasion technique of stain removal was given by: A Kroll. B McInnis. C Nutting. D Stewart. High-Yield Explanation KROLL → “MICROABRASION technique“18% HCl. Indication of microabrasion: Fluorosis stains/any stains–limited to depth, not more than 0.2 to 0.3 mm.