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IN VITRO EVALUATION OF ACCURACY AND CONSISTENCY OF FOUR DIFFERENT ELECTRONIC APEX LOCATORS

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Á¶ÀçÇö ( Cho Jae-Hyun ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ º¸Á¸Çб³½Ç
±Ý±â¿¬ ( Kum Kee-Yeon ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø º¸Á¸Çб³½Ç
À̽ÂÁ¾ ( Lee Seung-Jong ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ º¸Á¸Çб³½Ç

Abstract

À̹ø ¿¬±¸´Â ¼­·Î ´Ù¸¥ 4°³ÀÇ ÀüÀÚ±Ù°üÀåÃøÁ¤±âÀÇ Á¤È®¼ºÀ» ÃøÁ¤ÇÏ°í °¢°¢ 0.5ÁöÁ¡°ú ApexÁöÁ¡¿¡¼­ÀÇ ÀÏ°ü¼ºÀ» ºñ±³ÇÏ°íÀÚ ÇÏ¿´´Ù. 40°³ÀÇ ¹ßÄ¡µÈ »óÇÏ¾Ç ¼Ò±¸Ä¡¸¦ ´ë»óÀ¸·Î Ä¡¼ö°­ °³¹æ ÈÄ alginate model¿¡ °íÁ¤½ÃÅ°°í ±Ù°üÀåÀ» ÃøÁ¤ÇÏ¿´´Ù. »ç¿ëµÈ ÀüÀÚ±Ù°üÀåÃøÁ¤±â´Â Root ZX (Merits, Tokyo, Japan), SmarPex (META, Seoul, Korea). Elements Diagnostic Unit (SybronEndo, CA, USA), E-Magic Finder Deluxe (S-Denti, Seoul, Korea)ÀÌ´Ù. ¸ÕÀú ¸ðµç Ä¡¾Æ¿¡¼­ 4°³ÀÇ ÀüÀÚ±Ù°üÀåÃøÁ¤±â¸¦ »ç¿ëÇÏ¿© 0.5ÁöÁ¡°ú ApexÁöÁ¡¿¡¼­ ±Ù°üÀåÀ» ÃøÁ¤ÇÏ¿© ÇÑ Ä¡¾Æ´ç 8°³ÀÇ ÃøÁ¤°ªÀ» ¾ò¾ú´Ù. ´ÙÀ½À¸·Î Ä¡¾Æ¸¦ °¢ ÀüÀÚ±Ù°üÀåÃøÁ¤±â´ç 10°³¾¿ 4°³ÀÇ ±×·ìÀ¸·Î ³ª´©¾î, °¢°¢ Á¦Á¶»çÀÇ Áö½Ã´ë·Î Root ZX, Elements Diagnostic Unit ¹× E-Magic Finder Deluxe´Â ¡¯¡¯0.5¡¯¡¯ÁöÁ¡¿¡¼­, SmarPex´Â ¡¯¡¯Apex¡¯¡¯ÁöÁ¡¿¡¼­ fileÀ» Ä¡¾Æ¿¡ cement·Î °íÁ¤½ÃÄ×´Ù. ÀÌÈÄ Ä¡±Ù´ÜºÎ 4 mm¸¦ »èÁ¦ÇÏ¿© 100¹èÀ²ÀÇ Image Proplus·Î °üÂûÇÏ¿© file ³¡¿¡¼­ ÁÖ±Ù´Ü°øÀÇ ¿Ü¿¬±îÁöÀÇ ½ÇÁ¦°Å¸®¸¦ ÃøÁ¤ÇÑ ÈÄ, 4°³ÀÇ ÀüÀÚ±Ù°üÀåÃøÁ¤±âÀÇ 0.5ÁöÁ¡ ¹× ApexÁöÁ¡¿¡¼­ file³¡°ú ÁÖ±Ù´Ü°ø »çÀÌÀÇ °Å¸®¸¦ °è»êÇÏ¿© ºñ±³ÇÏ¿´´Ù. ±× °á°ú Root ZX¿Í E-Magic Finder´Â ½ÇÇ豺 100%, SmarPex´Â 90%, Elements Diagnostic Unit´Â 70%¿¡¼­ ÁÖ±Ù´Ü°ø°úÀÇ °Å¸®°¡ ÀÓ»óÀû Çã¿ë¹üÀ§ÀÎ ¡¾0.5 mmÀ̳»¿¡ ÀÖ¾ú´Ù. ¶ÇÇÑ °¢ ÀüÀÚ±Ù°üÀåÃøÁ¤±â ¸¶´Ù 0.5ÁöÁ¡°ú ApexÁöÁ¡¿¡¼­ÀÇ ±Ù°üÀåÀÇ Ç¥ÁØÆíÂ÷¿Í »çºÐÀ§ ¹üÀ§¸¦ ±¸ÇÏ¿© µÎ ÁöÁ¡°£ÀÇ ÀÏ°ü¼ºÀ» ºñ±³ÇÑ °á°ú, Root ZX, E-Magic Finder´Â 0.5ÁöÁ¡°ú ApexÁöÁ¡¿¡¼­ ºñ½ÁÇÑ ÀÏ°ü¼ºÀ» º¸¿´À¸¸ç SmarPex¿Í Elements Diagnostic unit´Â ApexÁöÁ¡¿¡¼­ 0.5ÁöÁ¡º¸´Ù ´õ ³ôÀº ÀÏ°ü¼ºÀ» º¸¿´´Ù. ÀüÀÚ±Ù°üÀåÃøÁ¤±â´Â ±Ù°ü ³»ÀÇ Á¶°Ç¿¡ °ü°è¾øÀÌ ±Ù÷ÇùÂøºÎ¿¡¼­ Ç×»ó ÀÏÁ¤ÇÑ °Å¸®¸¦ ÀçÇöÇØ ³¾ ¼ö ÀÖ´Â ÀÏ°ü¼ºÀÌ Áß¿äÇϹǷÎ, ÀÌ·¸°Ô 0.5ÁöÁ¡ ¶Ç´Â ApexÁöÁ¡¿¡¼­ÀÇ ÀÏ°ü¼ºÀÌ Áõ¸íµÈ´Ù¸é ½ÇÁ¦ ÀÓ»ó¿¡¼­ »ç¿ëÇÒ ¶§ ÀüÀÚ±Ù°üÀå¿¡¼­ ÀÏÁ¤ÇÑ °Å ¸®¸¦ °¡°¨ÇÏ¿© »ç¿ëÇÒ ¼ö ÀÖ´Ù.

The purpose of this study was to evaluate the accuracy and the consistency of four different electronic apex locators in an in vitro model. Fourty extracted premolars were used for the study. Four electronic apex locators (EAL) were Root ZX, Smarpex, Elements Diagnostic Unit (EDU), and E-Magic Finder Deluxe (EMF). After access preparation, the teeth were embedded in an alginate model and the length measurements were carried out at ¡¯¡¯0.5¡¯¡¯ and ¡¯¡¯Apex¡¯¡¯ mark using four EALs. The file was cemented at the location of the manufacturers¡¯¡¯ instruction (Root ZX, EDU, EMF: 0.5 mark, SmarPex: Apex mark). The apical 4mm of the apex was exposed and the distance from the file tip to the major foramen was measured by Image ProPlus ( ¡¿ 100). The distance from the file tip to the major foramen was calculated at 0.5 and Apex mark and the consistency of 0.5 and Apex mark was compared by SD and Quartile of Box plots. In this study, Root ZX and EMF located the apical constriction accurately within ¡¾0.5 mm in 100%, whereas SmarPex and EDU located in 90% and in 70% respectively. For Root ZX and EMF, there was no significant difference between the consistency of 0.5 and Apex mark. However, for the EDU and SmarPex, Apex mark was more consistent than 0.5 mark. From the evaluation of the consistency in this study, for Root ZX and EMF, both 0.5 and Apex mark can be used as a standard mark. And for EDU and SmarPex, the Apex mark can be recommended to be used as a standard mark. [J Kor Acad Cons Dent 31 (5) :390-397, 2006]

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Electronic apex locator;Consistency;Accuracy;Alginate model;Major foramen;Apical constriction

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