%0 Journal Article
%T Calcium hydroxide removal: effectiveness of ultrasonic and manual techniques = Remo  o de hidr車xido de c芍lcio: efic芍cia das t谷cnicas ultrass nica e manual
%A Bˋttcher
%A Daiana Elisabeth
%A Rahde
%A Nicole de Mello
%A Grecca
%A Fabiana Soares
%J Revista Odonto Ci那ncia
%D 2012
%I Editora da Pontif赤cia Universidade Cat車lica do Rio Grande do Sul (EDIPUCRS)
%X Objetivo: Diferentes t谷cnicas s o propostas para melhorar a remo  o da pasta de hidr車xido de c芍lcio. O objetivo do presente estudo in vitro foi comparar a efetividade das t谷cnicas ultrass nica e manual para a remo  o do hidr車xido de c芍lcio do canal radicular. Metodologia: Trinta e oito dentes monorradiculares foram divididos em dois grupos de 19 dentes cada. Os dentes foram preparados atrav谷s da t谷cnica de coroa-芍pice at谷 o instrumento mem車ria #50. Ap車s o preparo, os canais foram radiografados e, ent o, preenchidos com hidr車xido de c芍lcio. A remo  o da pasta no grupo I foi feita com o uso do ultrassom enquanto que no grupo II, a pasta foi removida atrav谷s da t谷cnica manual. Os dentes foram radiografados novamente para avaliar a remo  o do hidr車xido de c芍lcio. As radiografias foram digitalizadas e os ter os avaliados de acordo com os n赤veis de cinza para quantificar a remo  o do hidr車xido de c芍lcio. Os testes para amostras independentes e o t de Student (a=0. 05) foram aplicados para comparar a remo  o da pasta entre os grupos e entre os ter os do canal. Resultados: N o houve diferen a entre as t谷cnicas ultrass nica e manual para a remo  o do hidr車xido de c芍lcio do canal radicular. N o houve diferen as estat赤sticas na compara  o ente os ter os avaliados. Conclus o: Nem a t谷cnica manual nem a ultrass nica removeram completamente o hidr車xido de c芍lcio do canal radicular. Purpose: Different techniques have been proposed to improve the removal of calcium hydroxide. The purpose of this in vitro study was to compare the effectiveness of ultrasound and manual techniques in the removal of calcium hydroxide from root canals. Methods: Thirty-eight single-rooted teeth were divided into two groups of 19 teeth each. The teeth were prepared using the crown-down technique with an apical master file #50. After shaping, the canals were radiographed and dressed with calcium hydroxide. After 14 days, the calcium hydroxide was removed with the ultrasound technique in group I and through manual filing in group II. The teeth were then radiographed again to evaluate the removal of the paste. To assess the calcium hydroxide removal, the radiographs were scanned and analyzed based on the gray levels. The independent samples and Student＊s t-tests (a=0. 05) were used for each group to compare the efficacy of calcium hydroxide removal between the groups and among thirds (cervical, middle and apical). Results: There was no difference between ultrasound and manual techniques in the removal of calcium hydroxide from root canals. There were no statistical differences among the thirds a
%K ENDODONTIA
%K HIDR車XIDOS
%U http://revistaseletronicas.pucrs.br/ojs/index.php/fo/article/view/9670/8219