{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,17]],"date-time":"2026-04-17T23:40:02Z","timestamp":1776469202874,"version":"3.51.2"},"reference-count":21,"publisher":"FapUNIFESP (SciELO)","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Pesqui. Odontol. Bras."],"published-print":{"date-parts":[[2002,9]]},"abstract":"<jats:p>A reabsor\u00e7\u00e3o cervical externa da raiz \u00e9 uma das desvantagens do procedimento clareador. V\u00e1rios s\u00e3o os mecanismos que podem ser respons\u00e1veis por desencadear esta reabsor\u00e7\u00e3o, dentre eles, a a\u00e7\u00e3o qu\u00edmica e f\u00edsica dos materiais utilizados, bem como a morfologia da jun\u00e7\u00e3o amelocement\u00e1ria. Este trabalho teve como objetivo observar uma poss\u00edvel via de comunica\u00e7\u00e3o entre a c\u00e2mara pulpar e a superf\u00edcie externa da raiz, medindo o pH e a infiltra\u00e7\u00e3o de corante na dentina cervical ap\u00f3s o procedimento clareador. Realizou-se o tratamento endod\u00f4ntico em 34 dentes incisivos permanentes. Os dentes foram divididos em 3 grupos experimentais de acordo com o n\u00edvel do corte da obtura\u00e7\u00e3o e selamento da embocadura dos canais com cimento de ion\u00f4mero de vidro. O clareamento foi realizado usando perborato de s\u00f3dio e per\u00f3xido de hidrog\u00eanio a 30%. As leituras do pH foram realizadas ap\u00f3s 30 min, 24 h, 48 h e 72 h do in\u00edcio do procedimento. A seguir, os dentes foram imersos em fucsina b\u00e1sica a 0,5% por 24 h para determinarmos poss\u00edveis diferen\u00e7as na permeabilidade da dentina cervical. Os resultados mostraram que o pH apresentou tend\u00eancia a se modificar quando o corte da obtura\u00e7\u00e3o permaneceu na embocadura dos canais, bem como quando se removeram 2 mm da obtura\u00e7\u00e3o e quando se selou a embocadura com cimento de ion\u00f4mero de vidro. A permeabilidade dentin\u00e1ria aumentou nos 3 grupos experimentais, em compara\u00e7\u00e3o com os dentes que compreenderam o grupo controle. Estas leves diferen\u00e7as podem sugerir uma via de comunica\u00e7\u00e3o entre a c\u00e2mara pulpar e a superf\u00edcie externa da raiz.<\/jats:p>","DOI":"10.1590\/s1517-74912002000300014","type":"journal-article","created":{"date-parts":[[2005,4,26]],"date-time":"2005-04-26T13:24:35Z","timestamp":1114521875000},"page":"263-268","source":"Crossref","is-referenced-by-count":12,"title":["Avalia\u00e7\u00e3o da varia\u00e7\u00e3o de pH e da permeabilidade da dentina cervical em dentes submetidos ao tratamento clareador"],"prefix":"10.1590","volume":"16","author":[{"given":"Mariela S. G.","family":"Dezotti","sequence":"first","affiliation":[{"name":"Universidade de S\u00e3o Paulo"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M\u00e1rio Honorato Silva e","family":"Souza J\u00fanior","sequence":"additional","affiliation":[{"name":"Universidade de S\u00e3o Paulo"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Celso Kenji","family":"Nishiyama","sequence":"additional","affiliation":[{"name":"Universidade de S\u00e3o Paulo; Profis"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"530","reference":[{"issue":"6","key":"ref1","doi-asserted-by":"crossref","first-page":"309","DOI":"10.1111\/j.1365-2591.1994.tb00274.x","article-title":"Influence of sodium hypoclorite on the permeability and structure of cervical human dentine","volume":"27","author":"Barbosa SV","year":"1994","journal-title":"Int Endod 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