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A COMPARATIVE STUDY ON RADIOPACITY OF CANAL FILLING AND RETROGRADE ROOT-END FILLING MATERIALS

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Abstract

º» ½ÇÇè¿¡¼­´Â ´Ù¾çÇÑ ¹æ»ç¼± ³ëÃâ Á¶°Ç¿¡ µû¸¥ aluminum step wedge¿¡ ´ëÇÑ ±¤ÇÐ ¹Ðµµ¸¦ ¾Ë¾Æº¸°í, ±× Áß ÀûÀýÇÑ ³ëÃâÁ¶°ÇÀ» ¼±ÅÃÇÏ¿© ¼öÁ¾ÀÇ ±Ù°ü ÃæÀüÀç¿Í Ä¡±Ù´Ü ¿ªÃæÀüÀçÀÇ ¹æ»ç¼± ºÒÅõ°ú¼º Á¤µµ¸¦ Æò°¡, ºñ±³ÇÏ¿´´Ù. ¹æ»ç¼± ºÒÅõ°ú¼ºÀÇ ±âÁØÀ» À§ÇØ 11°³ÀÇ stepÀ¸·Î ±¸¼ºµÈ aluminum step wedge¸¦ Á¦ÀÛÇÏ¿©, 60 kVp, 70 kVp °üÀü¾Ð »óÅ¿¡¼­ °¢°¢ 0.2, 0.,3, 0.4ÃÊ¿Í 0.2, 0.3, 0.33ÃÊÀÇ ³ëÃâ½Ã°£À¸·Î ±³ÇÕ Çʸ§»ó¿¡¼­ ¹æ»ç¼± ÃÔ¿µ ÈÄ ÀûÀýÇÑ ³ëÃâÁ¶°ÇÀ» ±¸ÇÏ¿´´Ù. Á÷°æ 5 mm, °¢°¢ÀÇ µÎ²² 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 mmÀÎ 10Á¾ (Gutta-percha, amalgam, Super , MTA, , Fuji II LC, AP AH, , , Tubli-)ÀÇ ±Ù°ü ÃæÀüÀç¿Í Ä¡±Ù´Ü ¿ªÃæÀüÀç ½ÃÆíÀ» °¢ Àç·á¿Í µÎ²²´ç 10°³¾¿ Á¦ÀÛÇÑ ÈÄ, µ¿ÀÏÇÑ µÎ²²ÀÇ »ó¾ÆÁú ½ÃÆí, aluminum step wedge¿Í ÇÔ²² Á¤ÇØÁø ³ëÃâÁ¶°Ç¿¡ µû¶ó ¹æ»ç¼± ÃÔ¿µÀ» ÇÏ¿´´Ù. ¸ðµç Çʸ§Àº ÀÚµ¿Çö»ó±â·Î Çö»óÇÏ¿´´Ù. ½ÃÆíÀÇ ÈæÈ­µµ¸¦ densitometer (Model 07-443, Victoreen Inc, Cleveland, Ohio, USA)·Î 5ȸ ¹Ýº¹ ÃøÁ¤ ÈÄ, Æò±Õ°ªÀ» ±¸ÇÏ¿© ȸ±ÍºÐ¼® ÈÄ ¾Ë·ç¹Ì´½ µÎ²²·Î ȯ»êÇÏ¿´´Ù. ¾ò¾îÁø Á¤º¸¸¦ ºÐ¼®ÇÏ¿© ´ÙÀ½ÀÇ °á°ú¸¦ ¾ò¾ú´Ù. 1. °üÀü¾Ð 60 kVp¿¡¼­ ³ëÃâ½Ã°£ 0.2, 0.3, 0.4ÃÊ, 70 kVp¿¡¼­ 0.2, 0.3. 0.33ÃÊ·Î º¯È­¸¦ ÁÖ¾î ¹æ»ç¼± ÃÔ¿µÀ» ÇÏ¿´À» ¶§, ÈæÈ­µµ°¡ 0.5-2.5 »çÀÌ¿©¾ß ÇÑ´Ù´Â ISO No. 6876 ±Ô°Ý¿¡ °¡Àå ÀûÇÕÇÑ °ÍÀº 60 kVp, 0.2ÃÊÀÏ °æ¿ì¿´´Ù. 2. ÃøÁ¤µÈ ±Ù°ü ÃæÀüÀç¿Í Ä¡±Ù´Ü ¿ªÃæÀüÀçµéÀÇ ¹æ»ç¼± ºÒÅõ°ú¼º ¸ðµÎ ISO No.4049 ±Ô°Ý¿¡ ÀûÇÕÇÏ¿´´Ù. 3. ±¤ÁßÇÕÇü ±Û·¡½º ¾ÆÀÌ¿À³ë¸Ó (Fuji II LC)¿Í ÄÄÆ÷¸Ó (Dyract)¸¦ Á¦¿ÜÇÏ°í´Â ANSI/ADA specification (2000) ¶Ç´Â ISO No. 6876 (2001)±Ô°ÝÀÌ Á¦½ÃÇÑ ÃÖ¼ÒÇÑ 3 mm Al ÀÌ»óÀÇ ¹æ»ç¼± ºÒÅõ°ú¼ºÀ» Áö³à¾ß ÇÑ´Ù´Â ±Ô°Ý¿¡ ÀûÇÕÇÏ¿´´Ù. ÀÌ»óÀÇ °á°ú´Â º» ½ÇÇè¿¡ »ç¿ëµÈ ¼öÁ¾ÀÇ ±Ù°ü ÃæÀüÀç¿Í Ä¡±Ù´Ü ¿ªÃæÀüÀç Áß Fuji II LC¿Í Dyract¸¦ Á¦¿ÜÇÏ°í ¸ðµÎ ±Ô°Ý¿¡ ÀûÇÕÇÑ ¹æ»ç¼± ºÒÅõ°ú¼ºÀ» °¡Áö°í ÀÖÀ½À» ½Ã»çÇÑ´Ù.

This study was performed to assess the radiopacity of a variety of canal filling and retrograde root-end filling materials according to the specification concerning root canal obturation materials. Ten materials including Gutta-percha pellets, amalgam, Fuji II LC, AP, Super , , AH , , Tubli-, and dentin were evaluated in this study. In the first part, densitometric reading of an each step of aluminum step wedge on occlusal film were performed at 60 kVp (0.2, 0.3, 0.4 s), 70 kVp (0.2, 0.3, 0.33 s) to decide appropriate voltage and exposure time. In the second part, ten specimens which are 5 mm in diameter and 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 mm in thickness, were fabricated from each material studied. The specimens were radiographed simultaneously with an aluminum step wedge under decided condition (60 kVp, 0.2 s). The mean radiographic density values of the materials were transformed into radiopacity expressed equivalent thickness of aluminum (mm Al). The following results were obtained. 1. Among the various conditions including 0.2 s, 0.3 s, 0.4 s at 60 kVp and 0.2 s, 0.3 s, 0.33 s at 70 kVp, the appropriate voltage and exposure time that meet the requirement of density from 0.5 to 2.0 was 0.2 s at 60 kVp. 2. All of the materials in this study had greater radiopacity than the minimun level recommended by ISO No. 4049 standards. 3. Most of the materials had greater radiopacity than 3 mm Al requirement of ANSI/ADA specification No. 57 (2000) and ISO No. 6876 (2001) standards except for Fuji II LC and Dyract. It suggests that all experimental canal filling and retrograde root-end filling materials have a sufficient radiopacity that meet the requirement concerning root canal obturation materials except for Fuji II LC and Dyract.

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Radiopacity;Aluminum step wedge;Canal filling;Retrograde root-end filling materials

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