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INFLUENCES OF DRY METHODS OF RETROCAVITY ON THE APICAL SEAL

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Abstract

¿Ü°úÀû ±Ù°üÄ¡·á¿¡¼­ ±Ù´ÜºÎÀÇ Æó¼â¼ºÀº ¼º°ø¿¡ ÇʼöÀûÀÌ´Ù. ±×¸®°í ¿Ü°úÀû ±Ù°üÄ¡·á½Ã
±Ù´ÜºÎ ¿ªÃæÀü¿Íµ¿Àº ½À±â³ª Ç÷¾×¿¡ ÀÇÇØ ¿À¿°µÇ±â ½¬¿ì¸ç ¿Íµ¿À» ÀÌ»óÀûÀ¸·Î °ÇÁ¶ÇϱⰡ
Ç×»ó ¿ëÀÌÇÏÁö´Â ¾Ê´Ù. º» ¿¬±¸ÀÇ ¸ñÀûÀº ¹Ì¼¼ Ä¡±Ù´Ü ¼ö¼ú¹ý¿¡¼­ Ä¡±Ù´Ü ¿ªÃæÀü¿Íµ¿ÀÇ °Ç
Á¶ ¹æ¹ýÀÌ Æó¼â¼º¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ¿¬±¸ÇÏ°íÀÚ ÇÔÀÌ´Ù.
Ä¡±Ù´Ü Æó¼â¼ºÀº ±Ù´Ü ´©Ãâ ¹× ÃæÀü¹°-¿Íº® ÀûÇÕ¼ºÀ¸·Î Æò°¡ÇÏ¿´´Ù. Ä¡±Ù´Ü ¿ªÃæÀü¿Íµ¿
°ÇÁ¶¹æ¹ý¿¡ µû¸¥ Ä¡±Ù´Ü ´©ÃâÀ» Æò°¡Çϱâ À§Çؼ­´Â ÃÖ±Ù¿¡ ¹ß°ÅµÈ »ó¾Ç ´ë±¸Ä¡ ±¸°³Ãø Ä¡±Ù
125°³¸¦ ¿Íµ¿°ÇÁ¶ ¹æ¹ý ¹× Ç÷¾×¿À¿°¿¡ µû¶ó 4°³ÀÇ ±ºÀ¸·Î ºÐ·ùÇÏ¿© ½ÇÇèÇÏ¿´´Ù. °¢ ½ÃÆíÄ¡
¾Æ¿¡¼­ ±Ù°üÀ» Çü¼ºÇÏ°í Ãø¹æ°¡¾Ð¹ýÀ¸·Î ÃæÀüÇÑ ÈÄ °¢ ±º¿¡ µû¶ó Àú¼Ó ´ÙÀ̾Ƹóµå Àý´Ü±â¸¦
ÀÌ¿ëÇÏ¿© Ä¡±Ù´Ü 3 mm¸¦ ÀýÁ¦ÇÏ¿´À¸¸ç ÃÊÀ½ÆÄ ½ºÅ×Àη¹½º ½ºÆ¿ ±â±¸¸¦ ÀÌ¿ëÇÏ¿© ±íÀÌ 3
mmÀÇ ¿ªÃæÀü¿Íµ¿À» Çü¼ºÇÏ°í IRM, Super EBA ¶Ç´Â º¹ÇÕ·¹ÁøÀ¸·Î ¿ªÃæÀüÇÏ¿´´Ù. ½ÃÆíÀ»
2% methylene blue ¿ë¾×¿¡ 7ÀÏ°£ ħÀá½ÃŲ ÈÄ 35% Áú»ê¿ë¾×¿¡¼­ ¿ëÇؽÃŲ ´ÙÀ½, ¿ø½ÉºÐ¸®
ÇÑ »óÃþ¾×À» ºñ»ö°è¸¦ ÀÌ¿ëÇÏ¿© ´©Ãâ »ö¼ÒÀÇ Èí±¤µµ¸¦ ÃøÁ¤ÇÏ¿´´Ù. °á°úÄ¡´Â ÀÌ¿øº¯·®ºÐ¼®
¹ý°ú Duncan's Multiple Range Test¸¦ ÀÌ¿ëÇÏ¿© ºÐ¼®ÇÏ¿´´Ù.
¿ªÃæÀü ¿Íµ¿ °ÇÁ¶¹æ¹ý¿¡ µû¸¥ ÃæÀü¹°-¿Íº® ÀûÇÕ¼ºÀ» Æò°¡Çϱâ À§Çؼ­´Â »ó¾Ç Á¦ ´ë±¸Ä¡
ÀÇ ±¸°³Ãø Ä¡±Ù 12°³¸¦ »ó±â¿Í °°ÀÌ 4°³ ±ºÀ¸·Î ºÐ·ùÇÏ¿© ±Ù°üÃæÀü, ¿ªÃæÀü¿Íµ¿ Çü¼º, ¿Íµ¿
°ÇÁ¶ ¹× ¿ªÃæÀüÀ» ½ÇÇèÇÏ¿´À¸¸ç, ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. ¾ÐÃà°ø±â³ª paper point·Î ¿Íµ¿À» °ÇÁ¶ÇÑ ±ºÀÌ, ¿ªÃæÀü ¿Íµ¿À» IRM °£ÀÌÃæÀüÀç, Super
EBA ½Ã¸àÆ® ¹× º¹ÇÕ·¹ÁøÀ¸·Î ÃæÀüÇÑ °æ¿ì °øÈ÷, cotton pellet ¸¸À¸·Î ¿Íµ¿À» °ÇÁ¶ÇÑ ±º¿¡
ºñÇØ ÀûÀº Ä¡±Ù´Ü ´©ÃâÀ» ³ªÅ¸³»¾ú´Âµ¥ ÀÌ´Â Super EBA ½Ã¸àÆ® ÃæÀü±º¿¡¼­¸¸ À¯ÀÇÇÑ Â÷ÀÌ
¸¦ ³ªÅ¸³»¾ú´Ù(p<0.05). ±×·¯³ª ÃæÀüÀç·á¿¡ °ü°è¾øÀÌ paper point·Î ¿Íµ¿À» °ÇÁ¶ÇÑ ±º°ú ¾Ð
Ãà°ø±â·Î °ÇÁ¶ÇÑ ±º »çÀÌ¿¡´Â À¯ÀÇÇÑ ´©ÃâÀÇ Â÷ÀÌ°¡ ³ªÅ¸³ªÁö ¾Ê¾Ò´Ù.
2. ¾ÐÃà°ø±â·Î ¿Íµ¿À» °ÇÁ¶ÇÑ °æ¿ì¿¡´Â, º¹ÇÕ·¹ÁøÀ¸·Î ÃæÀüÇÑ ±ºÀÌ IRMÀ̳ª Super EBA·Î
ÃæÀüÇÑ ±º¿¡ ºñÇØ À¯ÀÇÇÏ°Ô ÀûÀº Ä¡±Ù´Ü ´©ÃâÀ» ³ªÅ¸³»¾ú´Ù(p<0.05).
3. ¿Íµ¿À» Ç÷¾×À¸·Î ¿À¿°½ÃŲ °æ¿ì¿¡´Â, ¿ªÃæÀü ¿Íµ¿À» IRM, Super EBA ¹× º¹ÇÕ·¹ÁøÀ¸·Î
ÃæÀüÇÑ ±º °øÈ÷, ¾ÐÃà°ø±â·Î ¿Íµ¿³»ºÎ¸¦ °ÇÁ¶ÇÑ °æ¿ì¿¡ ºñÇØ À¯ÀÇÇÏ°Ô ¸¹Àº Ä¡±Ù´Ü ´©ÃâÀ»
³ªÅ¸³»¾ú´Ù(p<0.05).
4. IRM °£ÀÌÃæÀüÀ糪 Super EBA ½Ã¸àÆ®·Î ¿ªÃæÀü¿Íµ¿À» ÃæÀüÇÑ °æ¿ì, ¿Íµ¿Ãøº®ÀÇ ¿ÜÃø
1/2ÀÌ ³»Ãø 1/2¿¡ ºñÇØ ³ÐÀº ÃæÀü¹°-Ä¡Áú »çÀÌ Æ´À» ³ªÅ¸³»¾ú´Ù.
5. IRM °£ÀÌÃæÀüÀç Super EBA ½Ã¸àÆ® ¹× º¹ÇÕ·¹ÁøÀ¸·Î ¿ªÃæÀü¿Íµ¿À» ÃæÀüÇÑ °æ¿ì °øÈ÷,
¿Íµ¿ÀÌ Ç÷¾×¿¡ ÀÇÇØ ¿À¿°µÇ¾ú°Å³ª ¿Íµ¿À» cotton pelletÀ¸·Î¸¸ °ÇÁ¶ÇÑ °æ¿ì°¡ paper point³ª
¾ÐÃà°ø±â·Î ¿Íµ¿À» °ÇÁ¶ÇÑ °æ¿ì¿¡ ºñÇØ ¿Íµ¿±âÀúºÎ¿¡ Å« Æ´À» ³ªÅ¸³»´Â ¾ç»óÀ» º¸¿´´Ù.
#ÃÊ·Ï#
Apical sealing is essential for the success of surgical endodontic treatment. Root-end
cavity is apt to be contaminated with moisture or blood, and is not always easy to be
dried completely. The purpose of this study was to evaluate the influence of dry
methods of retrocavity on the apical seal in endodontic surgery.
Apical seal was investigated through the evaluation of apical leakage and adaptation
of filling material over the cavity wall. To investigate the influence of various dry
methods on the apical leakage, 125 palatal roots of extracted human maxillary molar
teeth were used. The clinical crown of each tooth was removed at 10 mm from the root
apex using a slow-speed diamond saw and water spray. Root canals of the all the
specimens were prepared with step-back technique and filled with gutta-percha by
lateral condensation method. After removing of the coronal 2 mm of filling material, the
access cavities were closed with Cavit(R). Two coats of nail polish were
applied to the external surface of each root. Apical three millimeters of each root was
resected perpendicular to the long axis of the root with a diamond saw. Class I
retrograde cavities were prepared with ultrasonic instruments. Retrocavities were washed
with physiologic saline solution and dried with various methods or contaminated with
human blood. Retrocavities were filled either with IRM, Super EBA or composite resin.
All the specimens were immersed in 2% mochylene blue solution for 7 days in an
incubator at 37¡É. The teeth were dissolved in 14 ml of 35% nitric acid solution and the
dye present within the root canal system was returned to solution. The leakage of dye
was quantitatively measured via spectrophotometric method. The obtained data were
analysed statistically using one-way ANOVA and Duncan's Multiple Range Test.
To evaluate the influence of various dry methods on the adaptation of filling material
over the cavity wall, 12 palatal roots of extracted human maxillary molar teeth were
used. After all the roots were prepared and filled, and retrograde cavities were made
and filled as above, roots were sectioned longitudinally. Filling-dentin interface of cut
surfaces were examined by scanning electron microscope.
The results were as follows: 1. Cavities dried with paper point or compressed air
showed less leakage than those dried with cotton pellet in Super EBA filled cavity
(p<0.05). However, there was no difference between paper point-and compressed
air-dried cavities.
2. When cavities were dried with compressed air, dentin-bonded composite resin-filled
cavities showed less apical leakage than IRM-or Super EBA-filled ones (p<0.05).
3. Regardless of the filling material, cavities contaminated with human blood showed
significantly more apical leakage than those dried with compressed air after saline
irrigation (p<0.05).
4. Outer half of the cavity showed larger dentin-filling interface gap than inner half did
when cavities were filled with IRM or Super EBA.
5. In all the filling material groups, cavities contaminated with blood or dried with
cotton pellets only showed larger defects at the base of the cavity than ones dried with
paper points or compressed air.

dry method; apical seal; retrocavity; Super EBA; IRM; composite resin; dentin-bonding agent; blood contamination;

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