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Effect of two different calcium hydroxide paste removal techniques on apical leakage: an electrochemical study

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Abstract

º» ¿¬±¸ÀÇ ¸ñÀûÀº ±Ù°ü³» ¾àÁ¦·Î »ç¿ëµÇ´Â ¼ö»êÈ­Ä®½·ÀÇ Á¦°Å¹æ¹ýÀÌ ±Ù°üÃæÀü ÈÄ Ä¡±Ù´Ü ¹Ì¼¼´©Ãâ¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ¾Ë¾Æº¸±â À§ÇÔÀÌ´Ù. 70°³ÀÇ ¹ß°ÅµÈ ´Ü±ÙÄ¡¸¦ ¿£Áø±¸µ¿Çü ProFile·Î ±Ù°üÇü¼ºÇÑ ÈÄ ¼ö¿ë¼º ¼ö»êÈ­Ä®½· Á¦Á¦¸¦ 1ÁÖÀÏ°£ Àû¿ëÇÏ°í µÎ ±ºÀ¸·Î ³ª´©¾î °¢±â ´Ù¸¥ ¹æ¹ýÀ¸·Î Á¦°ÅÇÏ¿´´Ù. A±ºÀº NaOCl·Î ±Ù°ü¼¼Á¤¸¸À» ½ÃÇàÇÏ¿´À¸¸ç, B±ºÀº ±Ù°üÇü¼º ½Ã »ç¿ëµÈ fileº¸´Ù ÇÑ ´Ü°è Å« Å©±âÀÇ ProFileÀ»»ç¿ëÇÏ¿© ±Ù°üÀ» ÀçÇü¼ºÇÑ ÈÄ NaOCl·Î ¼¼Ã´ÇÏ¿´´Ù. ±Ù°üÃæÀü ÈÄ Àü±âÈ­ÇÐÀû ¹æ¹ýÀ¸·Î 24ÀÏ µ¿¾È Ä¡±Ù´Ü ´©ÃâÀ» ÃøÁ¤, ºñ±³ÇÏ¿´´Ù. º» ¿¬±¸ÀÇ °á°ú ¼ö»êÈ­ Ä®½· Á¦°Å¸¦ À§ÇÑ µÎ°¡Áö ¹æ¹ýÀº ±Ù°üÃæÀüÈÄ Ä¡±Ù´Ü ¹Ì¼¼´©Ãâ¿¡ À־ Â÷ÀÌ°¡ ¾øÀ½À» ¾Ë ¼ö ÀÖ¾ú´Ù.

This study evaluated the effect of two different calcium hydroxide ($Ca(OH)_2$) paste removal techniques on the apical leakage of canals obturated with gutta percha cones and sealer after removing a $Ca(OH)_2$ dressing using an electrochemical method. Seventy extracted single-rooted teeth were instrumented on with Profile rotary files under NaOCl irrigation. Fifty-eight canals were filled with calcium hydroxide paste, which was then removed using one of the following two techniques. In group A, calcium hydroxide was removed using only NaOCl irrigation, and in group B, the canals were re-prepared with a Profile rotary files-one size larger than the previous instrument and were irrigated with NaOCl. In both groups, the root surfaces were coated twice with nail varnish from CEJ to an area 4 mm away from the apex after canal obturation. Apical leakage was measured using an electrochemical method for 24 days. All the specimens showed leakage that increased markedly in the first three days. There was no significant difference between the two groups (p>0.05). The effect of two calcium hydroxide paste removal techniques on the apical leakage was not different during a short period.

Å°¿öµå

¼ö»êÈ­Ä®½·;Á¦°Å¹æ¹ý;Ä¡±Ù´Ü ´©Ãâ;Àü±âÈ­ÇÐÀû ¹æ¹ý;Calcium hydroxide;Removal technique;Apical leakage;Electrochemical method

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