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BIOMECHANICAL STUDY OF THE CALVARIAL DEFECTS AFTER IMPLANTATION OF THE TOOTHASH AND PLASTER IN THE RAT

±è¿µ±Õ, °í¿µ¹«,
¼Ò¼Ó »ó¼¼Á¤º¸
±è¿µ±Õ (  ) - Á¶¼±´ëÇб³
°í¿µ¹« (  ) - Á¶¼±´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úÀç·áÇб³½Ç

Abstract

°á·Ð
ÀúÀÚ´Â ¹é¼­ÀÇ µÎ°³ºÎ¿¡ 10¡¿10mm Å©±âÀÇ ÀüÃþ °ñ°á¼ÕÀ» ¾ß±â½ÃÅ°°í Ä¡¾ÆȸºÐ°ú ¼®°í¸¦
¸Å½ÄÇÏ¿© 12ÁÖ ¹× 20ÁÖ° Èñ»ýÇÏ¿© ½ÃÆíÀ» äÃëÇÑ ÈÄ 12ÁÖ ½ÃÆí¿¡¼­ Á¶Á÷º´¸®ÇÐÀû °üÂûÀ»
½ÃÇàÇÏ¿´°í 12ÁÖ ¹× 20ÁÖ ½ÃÆí¿¡¼­ ¶ôÅ©À£ °æµµ±â¸¦ ÀÌ¿ëÇÏ¿© Çü¼ºµÈ ½Å»ý°ñ ºÎÀ§¿¡ ´ëÇÑ
ºñÄ¿½º °æµµÄ¡¸¦ ÃøÁ¤ÇÔÀ¸·Î½á ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù.
1. ½ÇÇè¿¡ »ç¿ëµÈ ¸ðµç ¸Å½ÄÁ¦´Â 12ÁÖ° À̹° ¹ÝÀÀÀ̳ª ¿°Áõ ¹ÝÀÀ ¾øÀÌ ¼­¼­È÷ Èí¼öµÇ°Å
³ª ½Å»ý°ñ°ú Á÷Á¢ À¯ÇյǸ鼭 °á¼ÕºÎ°¡ Ä¡À¯µÇ´Â ¼Ò°ßÀ» º¸¿´´Ù.
2. °æµµÃøÁ¤±â¸¦ ÀÌ¿ëÇÑ ½Å»ý°ñ Çü¼ººÎÀÇ °æµµ´Â Á¤»ó°ñ¿¡ ºñÇؼ­´Â ¾àÇÏÁö¸¸ »ó´ç Á¤µµ
ÀÇ °æµµ¸¦ º¸À¯ÇÏ°í ÀÖ¾ú´Ù.
µû¶ó¼­ Ä¡¾ÆȸºÐ°ú ¼®°í´Â »ýüÀûÇÕ¼ºÀÌ ÀÖ´Â °ñÀüµµ ¹°ÁúÀÌ¸ç °ñÀüµµ ÀÛ¿ë¿¡ ÀÇÇØ Çü¼º
µÈ ½Å»ý°ñÀº Á¤»ó°ñ¿¡ ºñÇØ °æµµ´Â ³·Áö¸¸ °á±¹Àº ¼º¼÷µÈ °ñÀÇ °æµµ¸¦ ¼­¼­È÷ ȸº¹ÇÒ ¼ö ÀÖ
À» °¡´É¼ºÀ» º¸¿´´Ù.

The purpose of this investigation was to determine the biomechanical property of
calvarial defects reconstructed using toothash, plaster and tooth-plaster mixture.
Full-thickness bony defects were made on the rat calvaria with size of 10mm¡¿10mm.
Group 1 was filled with toothash only, group 2 : toothash-plaster mixture, and group 3 :
plaster only. The defects were allowed to heal for 12 and 20 weeks before killing the
animals. Light microscopic examinations was taken after 12 week after operation. The
hardness was evaluated for test of mechanical property.
The following results were obtained :
1. In light microscopic examination 12 week after operation, there were no inflammatory
and foreign body reaction. Implanted particles were resorbed gradually or united directly
with newly formed bone.
2. In hardness test, the hardness of newly formed bone was lower than that of normal
bone and there was significant difference(P<0.01). The site of new bone formation has
enough hardness to resist the mechanical stress.
These results suggest that toothash and plaster are biocompatible and osteoconductive
material.

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