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The Whitening Effect and Histological Safety of Nonthermal Atmospheric Plasma Inducing Tooth Bleaching

Author

Listed:
  • Seoul-Hee Nam

    (Department of Dental Hygiene, College of Health Science, Kangwon National University, Samcheok 25949, Korea)

  • Byul Bo Ra Choi

    (Feagle Co., Ltd., Yangsan 50614, Korea)

  • Gyoo-Cheon Kim

    (Feagle Co., Ltd., Yangsan 50614, Korea
    Department of Oral Anatomy, School of Dentistry, Pusan National University, Yangsan 50612, Korea)

Abstract

Various light sources have been applied to enhance the bleaching effect. This study was to identify the histological evaluation in oral soft tissues, as well as tooth color change after tooth bleaching by nonthermal atmospheric pressure plasma (NAPP). Nine New Zealand adult female rabbits were randomly divided into three groups ( n = 3): group 1 received no treatment; group 2 was treated with NAPP and 15% carbamide peroxide (CP), which contains 5.4% H 2 O 2 , and group 3 was treated with 15% CP without NAPP. Color change (Δ E ) was measured using the Shade Eye NCC colorimeter. Animals were euthanized one day later to analyze the histological responses occurring in oral soft tissues, including pulp, gingiva, tongue, buccal mucosa, and hard and soft palates. Changes in all samples were analyzed by hematoxylin and eosin staining and Masson’s trichrome. Teeth treated with plasma showed higher ΔE than that obtained with bleaching agents alone. Overall, the histological characteristics observed no appreciable changes. The combinational treatment of plasma had not indicated inflammatory responses as well as thermal damages. NAPP did not cause histological damage in oral soft tissues during tooth bleaching. We suggest that NAPP could be a novel alternative energy source to conventional light sources for tooth bleaching.

Suggested Citation

  • Seoul-Hee Nam & Byul Bo Ra Choi & Gyoo-Cheon Kim, 2021. "The Whitening Effect and Histological Safety of Nonthermal Atmospheric Plasma Inducing Tooth Bleaching," IJERPH, MDPI, vol. 18(9), pages 1-10, April.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:9:p:4714-:d:545591
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