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¸ðÁ¶ ±Ù°üÀÇ Å©±â¿Í ÃæÀü ¹æ¹ýÀÌ orthograde MTA apical plugÀÇ ¹Ì¼¼´©Ãâ¿¡ ¹ÌÄ¡´Â ¿µÇâ

EFFECTS OF CONDENSATION TECHNIQUES AND CANAL SIZES ON THE MICROLEAKAGE OF ORTHOGRADE MTA APICAL PLUG IN SIMULATED CANALS

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³²µæ¸² ( Nam Deuk-Lim ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Á¸Çб³½Ç
¹ÚÁ¤±æ ( Park Jeong-Kil ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Á¸Çб³½Ç
Ç㺹 ( Hur Bock ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Á¸Çб³½Ç
±èÇöö ( Kim Hyeon-Cheol ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Á¸Çб³½Ç

Abstract

ÀÌ ¿¬±¸ÀÇ ¸ñÀûÀº ¼­·Î ´Ù¸¥ µÎ °³ÀÇ ±Ù°ü Å©±â(#70, #120)¸¦ °¡Áø ·¹Áø ¸ðÇü¿¡ MTA (minoral trioxide aggregate)¸¦ ¼­·Î ´Ù¸¥ µÎ °¡Áö ¹æ¹ý (¼ö±â±¸ ÃæÀü(HC), ÃÊÀ½ÆÄ º¸Á¶ ¼ö±â±¸ ÃæÀü(UAHC))À¸·Î Á¤¹æÀ§ ÃæÀüÇÏ°í MTA apical plugÀÇ ¹Ì¼¼ ´©ÃâÀ» Æò°¡ÇÏ´Â °ÍÀÌ´Ù. Á÷¼±Çü ±Ù°ü ÇüŸ¦ °¡Áö¸ç, #70°ú #120ÀÇ Ä¡±Ù´Ü Å©±â¸¦ °®´Â ·¹Áø ¸ðÇüÀ» °¢°¢ 30°³¾¿ ÁغñÇÏ¿´´Ù. ÀÌ ½ÃÆíµéÀ» MTAÀÇ Àû¿ë ¹æ¹ý¿¡ µû¶ó °¢ ±ºÀ» 2°³ÀÇ ¾Æ±ºÀ¸·Î ´ÙÀ½°ú °°ÀÌ ºÐ·ùÇÏ¿´´Ù (n=15); C70: HC + Ä¡±Ù´Ü Å©±â #70, C120: HC + Ä¡±Ù´Ü Å©±â #120, U70: UAHC + Ä¡±Ù´Ü Å©±â #70, U120: UAHC + Ä¡±Ù´Ü Å©±â #120. MTA ÃæÀüÀ» ¿Ï·áÇÑ ÈÄ¿¡, 24½Ã°£ µ¿¾È ½Ç¿Â¿¡¼­ 100% ½Àµµ¸¦ À¯ÁöÇÏ¿© °æÈ­½ÃÄ×´Ù. ±Ù°üÀÇ »óºÎ´Â ¿­¿¬È­ ÃæÀü ½Ã½ºÅÛ(Obtura II)À» ÀÌ¿ëÇÏ¿© ÃæÀüÇÏ¿´´Ù. 48½Ã°£ µ¿¾È 100% ½Àµµ¸¦ À¯ÁöÇÏ¿© ½Ç¿Â¿¡¼­ 0.2% rhodamine B ¿ë¾×À» ÀÌ¿ëÇØ ¹Ì¼¼´©Ãâ ½ÇÇèÀ» ÇÏ¿´´Ù. ÀÌ ¿¬±¸°á°ú #70ÀÇ Ä¡±Ù´Ü Å©±â¸¦ °®´Â ±×·ì »çÀÌ¿¡¼­ UAHC°¡ HC¿¡ ºñÇØ ¹Ì¼¼´©ÃâÀÌ ÀûÀº °ÍÀ¸·Î ³ªÅ¸³µ´Ù(p<0.05). ÀÌ ¿¬±¸ Á¶°ÇÇÏ¿¡¼­´Â ÃÊÀ½ÆÄ Áøµ¿À» µ¿¹ÝÇÑ Á¤¹æÀ§ MTA apical plug Çü¼º ¹æ¹ýÀÌ, ƯÈ÷ Á¼Àº ±Ù°ü¿¡¼­ ´õ È¿À²ÀûÀÎ °ÍÀ¸·Î »ç·áµÈ´Ù.

The purpose of this study was to compare the dye leakage of MTA (mineral trioxide aggregate) apical plug produced by two orthograde placement techniques (hand condensation technique and ultrasonically assisted hand condensation technique). To simulate straight canal, 60 transparent acrylic blocks with straight canal were fabricated. These transparent acrylic blocks were divided into 2 groups (Group C; hand condensation technique (HC) and Group U; ultrasonically assisted hand condensation technique (UAHC)) of 30 blocks with each MTA application method. Each group was divided into 2 subgroups (n=15) with different canal size of #70 (subgroup C70 and subgroup U70) and #120 (subgroup C120 and subgroup U120). After apical plug was created, a wet paper point was placed over the MTA plug and specimen was kept in a humid condition at room temperature to allow MTA to set. After 24 hours, remaining canal space was backfilled using Obtura II. All specimens were transferred to floral form socked by 0.2% rhodamine B solution and stored in 100% humidity at room temperature. After 48 hours, resin block specimens were washed and scanned using a scanner. The maximum length of micro leakage was measured from the scanned images of four surfaces of each resin block using Photoshop 6.0. Statistical analysis was performed with Mann-Whitney U test. Group U of UAHC had significantly lower leakage than Group C of HC in #70-size canal (subgroup U70) (p<0.05).

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MTA;apical plug;orthograde placement;hand condensation;ultrasonic

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