Title
In-office bleaching effect with different concentrations of hydrogen peroxide on enamel color and demineralization
Authors
Bilal Ahmad Mir*, Muneesa Jan, Anu Sharma, Aamir Rashid Purra, Fayaz Ahmed Ahanger & Ajaz Amin Masoodi
Affiliation
Department of Conservative Dentistry and Endodontics, Government Dental College and Hospital, Srinagar, Jammu and Kashmir, India; *Corresponding author
Bilal Ahmad Mir - E-mail: munesaandrabi@gmail.com
Muneesa Jan - E-mail: muneesaandrabi@gmail.com
Anu Sharma - E-mail: sharmanu999@gmail.com
Aamir Rashid Purra - E-mail: apurra76@gmail.com
Fayaz Ahmed Ahanger - E-mail: faahangar@yahoo.com
Ajaz Amin Masoodi - E-mail: ajazmsoodi@gmail.com
Article Type
Research Article
Date
Received April 1, 2026; Revised April 30, 2026; Accepted April 30, 2026, Published April 30, 2026
Abstract
Use of hydrogen peroxide in tooth bleaching can cause microscopic alterations such as increasedsurface depressions, irregularities and elevated surface roughness. Therefore, it is of interest to report the enamel surface effects of two in-office hydrogen peroxide (HP) bleaching gels. Forty-eight intact human premolars were sectioned mesio-distally, creating two halves, which were then assigned to 2 groups. Group I (35% HP with calcium; whiteness HP Blue 35%, FGM) or Group II (40% HP with fluoride/potassium nitrate; Opalescence Boost, Ultradent). Bleaching was performed in a single 40-minute session per manufacturer protocol. Baseline and post-treatment measurements were taken using a spectrophotometer (VITA Easyshade) for color and a laser fluorescence device (DIAGNOdent pen, KaVo) for quantifying demineralization. The 40% hydrogen peroxide gel with fluoride and potassium nitrate produced a superior whitening effect; both bleaching agents resulted in comparable levels of enamel surface demineralization.
Keywords
Colorimetry; DIAGNOdent; enamel demineralization; hydrogen peroxide(HP); split-tooth model; in vitro study, tooth bleaching
Citation
Mir et al. Bioinformation 22(4): 2395-2399 (2026)
Edited by
P Babaji
ISSN
0973-2063
Publisher
License
This is an Open Access article which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. This is distributed under the terms of the Creative Commons Attribution License.
