Generation of Free Radicals and/or Active Oxygen by Light or Laser Irradiation of Hydrogen Peroxide or Sodium Hypochlorite

Kashima-Tanaka, Midori; Tsujimoto, Yasuhisa; Kawamoto, Kiyosumi; Senda, N.; Ito, Koichi; Yamazaki, Masahito

doi:10.1097/00004770-200302000-00013

Cited by 102 publications

(78 citation statements)

References 9 publications

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“…In a study by Kashima-Tanaka et al 10) , the amount 3 Mean±SD values of increase ratio of bovine enamel surface roughness before and after in-office bleaching. Significant difference was found between 30%H2O2-NaHCO3 and OFP, as indicated by a horizontal bracket between these two bleaching agents.…”

Section: Discussionmentioning

confidence: 99%

Bleaching using 30% hydrogen peroxide and sodium hydrogen carbonate

Ito

Momoi

2011

Dent. Mater. J.

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Colorimetric measurementDuring the 6-day bleaching regime, all specimens were stored at 37°C temperature and 100% humidity. On a daily basis from day 1 to day 6, colorimetric measurement was performed three times before and after bleaching Bleaching using 30% hydrogen peroxide and sodium hydrogen carbonate Yuko ITO and Yasuko MOMOI Department of Operative Dentistry, School of Dental Medicine, Tsurumi University, Japan Corresponding author, Yuko ITO; This study investigated the bleaching efficacy of a mixture of sodium hydrogen carbonate (NaHCO3) and 30% hydrogen peroxide (H2O2), the latter being an active ingredient in in-office bleaching products. A commercially available 35% H2O2-based in-office bleaching product was used as a control and for comparison. Enamel surfaces after bleaching were evaluated for post-bleaching color change, Vickers hardness, surface roughness, erosion depth, and surface morphology (SEM images). The bleaching efficacy of 30%H2O2-NaHCO3 was comparable to that of control, and favorable results over the control were obtained after bleaching with 30%H2O2-NaHCO3, lower increase in surface roughness, smaller erosion depth, and reduced extent of enamel erosion based on SEM images. These results were obtained because an addition of NaHCO3 to H2O2 changed the initially low pH to a higher one.

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Section: Discussionmentioning

confidence: 99%

Bleaching using 30% hydrogen peroxide and sodium hydrogen carbonate

Ito

Momoi

2011

Dent. Mater. J.

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“…• from H2O2 has been shown to increase 7) . Various pathways have been shown to be involved in • generated from samples (referred to Fig.1b).…”

Section: Discussionmentioning

confidence: 98%

“…• plays a critical role in the oxidative process of TiO2 with photocatalytic activity, and promotes bleaching effects 7,8,[14][15][16] . These findings indicate the novel bleaching efficacy of R HAp-TiO2 in the presence of H2O2 with UVA irradiation.…”

Section: O2mentioning

confidence: 99%

“…The bleaching effect may involve modification of the microstructural integrity of the enamel in deeper regions when a high concentration of H2O2 is applied 4,5) . The mechanism of tooth bleaching is thought to result from the formation of ROS, especially hydroxyl radicals (HO • ) generated from H2O2 in bleaching agents [6][7][8][9][10][11] . However, the generation of HO…”

Section: Introductionmentioning

confidence: 99%

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ESR investigation of ROS generated by H2O2 bleaching with TiO2 coated HAp

et al. 2012

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“…Various materials and techniques have been reported with wide variations in their efficacy regarding the removal of the intra canal smear layer 3,5,15,16) . Alternative methods facilitating clinical work with effective root canal cleaning include laser technology 17,18) and passive ultrasonic irrigation (PUI)…”

Section: Discussionmentioning

confidence: 99%

Evaluation of an automated system for root canal irrigation: a scanning electron microscopy study

et al. 2012

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This study evaluated a new automated system using alternative irrigants for root canal cleaning treatments. This method relies on a system inserting an enzymatic solution based on Trypsin flowing inside the pulp chambers and root canals, completely avoiding traditional endodontic instrumentation. Sixty freshly extracted human molar teeth were randomly divided into 4 groups to assess 3 regimens (R1-3) differing in 0.25% Trypsin/EDTA and 5% Sodium Hypochlorite (NaOCl) solutions administration. Scanning electron microscopy observations and scores taking into account changes in dentin tubules were used to assess treatment effects in pulp chambers and roots. Significant changes in root cleaning ability relative to administration timing were observed, with the best results found in R3, with scheduled alternated cycles of Trypsin/EDTA and NaOCl inside the tooth. The non-invasive root canal method demonstrates good teeth cleaning ability independent of root morphology. This equipment may provide lower discomfort levels for patients undergoing endodontic treatment.

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Generation of Free Radicals and/or Active Oxygen by Light or Laser Irradiation of Hydrogen Peroxide or Sodium Hypochlorite

Cited by 102 publications

References 9 publications

Bleaching using 30% hydrogen peroxide and sodium hydrogen carbonate

Bleaching using 30% hydrogen peroxide and sodium hydrogen carbonate

ESR investigation of ROS generated by H<Sub>2</Sub>O<Sub>2</Sub> bleaching with TiO<Sub>2</Sub> coated HAp

Evaluation of an automated system for root canal irrigation: a scanning electron microscopy study

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