Evaluation of Effects of Different Bleaching Agents on Bovine Surface Enamel
Journal Title: Journal of Advanced Medical and Dental Sciences Research - Year 2018, Vol 6, Issue 3
Abstract
Background: Among various bleaching techniques for intrinsic tooth discoloration, vital and nonvital bleaching techniques are common one. The present study was conducted to evaluate the effects of bleaching agents with and withoutfluoride as well as the post-bleaching fluoridation on bovinesurface enamel. Materials & Methods: This study was conducted in department of Endodontics.It included 60 extracted bovine incisors which were cut into halves, embedded andthen divided into the following three groups. Group I: It consisted of 20 control specimens soaked in Hank buffer salinesolution (HBSS) at 37 degree C for 2 weeks. Group II: It consisted of 20 specimens treated with 10% opalescence fluoride-free bleachingagent. Group III: It consisted of 20 specimens treated with 10% opalescence fluoride-free bleachingagent with additional 2% neutral sodium fluoridegel for 3 min. All specimens were evaluated for color change and micro hardness on day 7 and day 14. Results: The lightness change in DL was more significant thanin Da and Db on Day 7. In group I, there was no color change. Group II, III showed DL and overall color change DE and increased by 3, 4 units, respectively. Group II, III showed comparable DL and DE values and greater than group I (P < 0.01) on Day 14.Group I showed minimal whitening effect and values were < 3 units. The color changewas increased in DL and decreased in Db but unchanged inDa in groups II, III. The DE in all groups exceeded by7. There were significant changes in the DL, Da, Db values in four bleaching groups from Days 7 to14. Conclusion: In all groups, whitening efficiency was similar with increase in whiteness and decrease in yellow color saturation. Fluoridated bleaching gel improves whitening efficiency and results in lessdemineralization changes such as the erosion morphologyand hardness loss.
Authors and Affiliations
Ankit Sharma, Chitral Chugh, Manasvi Mahajan
Keywords
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