MICROABRASION & MACROABRASION

By Dr. Vishaal Bhat on Friday 28 January 2011 with 0 comments



These techniques are conservative alternatives for the treatment of superficial discoloration or enamel defects, like those in fluorosis, Amelogenesis Imperfecta .In case the defect or stain still persists after the treatment, a restoration can be placed.

  

MICROABRASION

1984 – McClosky:
Recommended a technique for removing brown stains of fluorosis, which were limited to enamel, by using a cotton pellet application of 18%HCL to stained surfaces. With repeated applications, enamel discolorations gradually disappeared.

1986 – Croll & Cavanaugh:
Modified the technique by using controlled HCl, Pumice abrasion on stained surfaces, called MICROABRASION. The paste is applied with a hand device like Tongue blade or a rotary driven rubber cup which has fluted edges .The rubber cup should be rotated at very slow speed to avoid removing any excess tooth structure & to prevent spatter. After application of a topical fluoride solution & final finishing & polishing, normal enamel surface characteristics are established. Croll further modified the technique by reducing the concentration of HCl to 11%& increasing the abrasives by using SiC particles instead of pumice. This is marketed as PRIMA.     

MACROABRASION
This also is a technique for the treatment of surface stains & defects, but utilizes a 12- fluted carbide bur or a micron diamond point at high speed. Adequate Air- water spray to be used  & light intermittent pressure to be applied to avoid irreversible damage.

Category: Conservative and Endodontics Notes , Conservative Dentistry Notes , Dental Materials Notes

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