{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T09:16:35Z","timestamp":1791191795528,"version":"4.1.0"},"reference-count":28,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2015,8,17]],"date-time":"2015-08-17T00:00:00Z","timestamp":1439769600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"Conselho Nacional de Desenvolvimento Cient\u00edfico e Tecnol\u00f3gico \u2013 CNPq"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Microscopy Res &amp;amp; Technique"],"published-print":{"date-parts":[[2015,11]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:p>This study aimed to evaluate effectiveness and effects of bleaching with 35% hydrogen peroxide with and without calcium on color, micromorphology, and the replacement of calcium and phosphate on the enamel surface. Thirty bovine enamel blocks (5.0 \u00d7 5.0 mm) were placed into the following groups: G1: artificial saliva (control); G2: 35% hydrogen peroxide gel without calcium (Whiteness HP Maxx\u2013FGM); and G3: 35% hydrogen peroxide gel with calcium (Whiteness HP Blue\u2013FGM). Three color measurements were performed with a spectrophotometer: untreated (baseline), after performing staining, and after application of bleaching agents. Calcium deposition on the enamel was evaluated before and after the application of bleaching agents using energy\u2010dispersive X\u2010ray spectrometry. The enamel surface micromorphology was observed under scanning electron microscopy. The pH of each product was measured. The data were subjected to one\u2010factor analysis of variance (ANOVA), and any differences were analyzed using Tukey's test (<jats:italic>P<\/jats:italic>\u2009&lt;\u20090.05). G3 showed greater variation in total color after the experiment than G2 and G1; there was no significant difference in calcium or phosphorus concentration before and after the experimental procedures; morphological changes were observed only in G2 and G3; and the pH values of the Whiteness HP Maxx and Whiteness HP Blue bleaching agents were 5.77 and 7.79, respectively. The 35% hydrogen peroxide with calcium showed greater bleaching potential, but the addition of calcium had no effect in terms of reducing morphological changes or increasing the calcium concentration on the enamel surface. <jats:italic>Microsc. Res. Tech. 78:975\u2013981, 2015<\/jats:italic>. \u00a9 2015 Wiley Periodicals, Inc.<\/jats:p>","DOI":"10.1002\/jemt.22561","type":"journal-article","created":{"date-parts":[[2015,8,17]],"date-time":"2015-08-17T08:03:50Z","timestamp":1439798630000},"page":"975-981","source":"Crossref","is-referenced-by-count":23,"title":["Effect of in\u2010office bleaching with 35% hydrogen peroxide with and without addition of calcium on the enamel surface"],"prefix":"10.1002","volume":"78","author":[{"given":"Izadora","family":"Quintela Souza de Moraes","sequence":"first","affiliation":[{"name":"School of Dentistry, Federal University of Alagoas Campus AC Sim\u00f5es, Av. Lourival Melo Mota, S\/N, Tabuleiro Do Martins, CEP: 57072\u2010970 Macei\u00f3 Alagoas Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lucas","family":"Nunes de Brito Silva","sequence":"additional","affiliation":[{"name":"School of Dentistry, Federal University of Alagoas Campus AC Sim\u00f5es, Av. Lourival Melo Mota, S\/N, Tabuleiro Do Martins, CEP: 57072\u2010970 Macei\u00f3 Alagoas Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Isabel Cristina","family":"Celerino de Moraes Porto","sequence":"additional","affiliation":[{"name":"Department of Restorative Dentistry School of Dentistry, Federal University of Alagoas Campus AC Sim\u00f5es, Av. Lourival Melo Mota, S\/N, Tabuleiro Do Martins, CEP: 57072\u2010970 Macei\u00f3 Alagoas Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cant\u00eddio Francisco","family":"de Lima Neto","sequence":"additional","affiliation":[{"name":"Laborat\u00f3rio LEAP, Instituto De Qu\u00edmica E Biotecnologia (IQB), Federal University of Alagoas Campus AC Sim\u00f5es, Av. Lourival Melo Mota, S\/N, Tabuleiro Do Martins, CEP: 57072\u2010970 Macei\u00f3 Alagoas Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Natanael","family":"Barbosa Dos Santos","sequence":"additional","affiliation":[{"name":"Department of Cariology School of Dentistry, Federal University of Alagoas Campus AC Sim\u00f5es, Av. Lourival Melo Mota, S\/N, Tabuleiro Do Martins, CEP: 57072\u2010970 Macei\u00f3 Alagoas Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Larissa","family":"Silveira de Mendon\u00e7a Fragoso","sequence":"additional","affiliation":[{"name":"Department of Restorative Dentistry School of Dentistry, Federal University of Alagoas Campus AC Sim\u00f5es, Av. 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