Title

Bleaching-induced microleakage among tooth-colored Class V restorative materials: Laboratory study

Authors

Arpita Arpita, Shilpi Tiwari*, Md Faisal Azeez, Annushree Acharya, Anuva Banerjee & Mallikarjuna Kandanulu

Affiliation

Department of Conservative Dentistry and Endodontics, Dental College, Azamgarh, Uttar Pradesh, India; *Corresponding author

Email

Arpita Arpita - E-mail: arpitakatiyar27@gmail.com
Shilpi Tiwari - E-mail: docshilpibhu08@gmail.com; Phone: +91 9538530953
Md Faisal Azeez - E-mail: mohdfaisal0087@gmail.com
Annushree Acharya - E-mail: acharyaannushree77@gmail.com
Anuva Banerjee - E-mail: tinnibanerjee2201@gmail.com
Mallikarjuna Kandanulu - E-mail: kandanulumallikarjun@gmail.com

Article Type

Research Article

Date

Received August 1, 2026; Revised August 31, 2026; Accepted August 31, 2026, Published August 31, 2026

Abstract

High-concentration bleaching agents may affect the tooth-restoration interface and increase marginal leakage in Class V restorations. This in vitro study restored 90 extracted human premolars with resin-modified glass ionomer cement (RMGIC), Cention N, or Filtek Z350XT nanofilled composite (n=30 each), with bleached and non-bleached subgroups of 15 specimens. Specimens were exposed to 35% hydrogen peroxide as assigned, immersed in 0.5% basic fuchsin, sectioned buccolingually and examined under a stereomicroscope at 10× magnification. Nanofilled composite showed the greatest microleakage followed by Cention N, while RMGIC showed the least; bleached subgroups generally showed greater leakage than their corresponding non-bleached controls and the RMGIC-Cention N difference was not significant. Thus, bleaching increased marginal leakage of the tested materials with RMGIC providing the most favorable seal and nanofilled composite the highest leakage.

Keywords

Resin-modified glass ionomer cement (RMGIC), Cention N, nanofilled composite, bleaching agent, microleakage, Class V restoration

Citation

Arpita et al. Bioinformation 22(8): 5462-5465 (2026)

Edited by

Hiroj Bagde

ISSN

0973-2063

Publisher

Biomedical Informatics

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.