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Tooth Whitening, the Microabrasion Technique, and White Spot Eradication
Published in Linda Greenwall, Tooth Whitening Techniques, 2017
Enamel microabrasion is a procedure in which a microscopic layer of enamel is simultaneously eroded and abraded with a special compound, leaving a perfectly intact enamel surface behind (Croll 1991b). It is used to treat enamel discolorations that may be the result of hypermineralization, hypomineralization, or staining. Croll (1991b) called the process “enamel dysmineralization,” which describes the superficial enamel coloration defects resulting from some disturbance of the normal mineralization process. There are advantages in using a combination of chemical and mechanical surface micro-reduction. In successful cases enamel loss is insignificant and unrecognizable and the patient is left with tooth surfaces that appear normal (Greenwall 2009). This technique can be used before, after, or during the whitening treatment.
Effect of resin infiltration and microabrasion on the microhardness, surface roughness and morphology of incipient carious lesions
Published in Acta Odontologica Scandinavica, 2018
White spot lesions are characterized by tiny pores within the lesion body of initial enamel caries, whereas the surface of the lesion remains relatively intact (pseudointact surface layer). Because it could hamper the resin from penetrating into the lesion, the pseudointact surface layer is removed by acid etching with hydrochloric acid using a resin infiltration technique [2,4,23]. Hydrochloric acid in similar concentrations is also accepted in esthetic dentistry to remove superficial discolorations and as a proposed treatment approach for the management of white spot lesions using enamel microabrasion [10–12]. However, more superficial enamel surface removal has been achieved with the resin infiltration technique compared with enamel microabrasion [2,5]. The primary aim of the resin infiltration technique is not complete removal of the surface layer, but rather, to increase the penetrability of low-viscosity light curing resins into the pores of incipient lesions, thereby protecting the lesion from further acid attacks. Moreover, after curing the resin material, lesion progression might be arrested and a mechanical support for the enamel lesion structure might be achieved [2,24,25].