COMPARING THE ENAMEL HARDNESS BY USING MI VARNISH™ WITH RECALDENT™ BEFORE AND AFTER BRACKET BONDING

Abstract

The objective of this work is to evaluate the in vitro efficacy of MI Varnish (Recaldent) as a prevention of dental enamel demineralization before and after bracket bonding. The methodology used consists of a sample of 40 teeth in artificial saliva, which will be divided into 4 groups of 10 teeth respectively: First group (10 teeth) will be 10 with Recaldent, Second group (10 teeth) without Recaldent both will be measured at 500 thermocycling cycles, third group (10 teeth) without Recaldent and fourth group (10 teeth) with Recaldent and these will be measured last two to 1000 thermocycling cycles . The statistical t-student test was used. The results showed that the hardness of the enamel at 500 cycles without Recaldent presented an average initial hardness of 326.42 +/- 39.62 HV(Kg/mm²)  and a final hardness of 226.42 +/-35.18 HV(Kg/mm²); showing a decrease in enamel hardness .Subsequently, the group that received Recaldent the initial average hardness was 310.28 +/- 41.13 HV(Kg/mm²)  and final 293.51 +/- 41.37 HV(Kg/mm²)  and at 1000 cycles without Recaldent its initial average hardness was 307.98 +/- 39.62 HV(Kg/mm²) and final 230.33 +/- 47.83 HV(Kg/mm²), the decrease in the hardness of the enamel being much greater and in the pieces treated with Recaldent at 1000 cycles presenting an initial average of 311.83 +/- 24.02HV(Kg/mm²) +/- and final 263.61 +/- 32.29 HV(Kg/mm²). In conclusion, at 500 cycles the hardness of the enamel was higher when using the Recaldent to improve the hardness of the enamel.