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COMPARATIVE STUDY ON THE HEALING PROCESS OF THE CALVARIAL DEFECT FILLED WITH HYDROXYAPATITE AND BIOGLASS IN RATS

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Abstract

°á·Ð
Bioglass¿Í HAÀÇ °ñÀüµµ´É°ú ¼ºÁú¿¡ ´ëÇÑ ºñ±³ ¿¬±¸¸¦ À§ÇØ ¹é¼­ÀÇ µÎ°³ºÎ¿¡ Á÷°æ 5mm
ÀÇ °ñ °á¼ÕºÎ¸¦ ÀÎÀ§ÀûÀ¸·Î Çü¼ºÇÏ°í ´ëÁ¶±ºÀº ´Ù¸¥ óġ ¾øÀÌ e-PTFEÀ» Àº ÈÄ ºÀÇÕÀ» ½Ã
ÇàÇÏ°í, ½ÇÇ豺Àº HA¿Í bioglass¸¦ °¢°¢ ¸Å½ÄÇÏ°í e-PTFEÀ» µ¤°í ºÀÇÕ ÈÄ 3, 7, 14 ¹× 28
ÀÏ¿¡ °æ½ÃÀûÀ¸·Î Èñ»ýÇÏ¿´´Ù. Hematoxylin & eosin(H&E) ¿°»ö, masson's trichrome(MT)
¿°»ö ¹× ¸é¿ªÁ¶Á÷È­ÇÐ(immunohistochemical) ¿°»öÈÄ ±¤ÇÐÇö¹Ì°æÀ¸·Î °Ë°æÇÏ°í ÁÖ»çÀüÀÚÇö
¹Ì°æ(scanning electron microscope, SEM)À¸·Î °üÂûÇÏ¿© ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù.
1. H&E ¿°»ö ¼Ò°ß¿¡¼­´Â ´ëÁ¶±º, HA ¹× bioglass ½ÇÇ豺 °øÈ÷ 3ÀÏ°ú 7ÀÏ°¿¡ ¸¸¼º ¿°Áõ
¼¼Æ÷ÀÇ Ä§À±ÀÌ º¸¿´À¸¸ç 14ÀÏ°¿¡´Â °¨¼ÒÇÏ¿´À¸¸ç, ´ëÁ¶±º°ú HA ½ÇÇ豺¿¡ ºñÇØ bioglass ½Ç
Ç豺¿¡¼­´Â ¿°Áõ¼¼Æ÷ÀÇ Ä§À±ÀÌ ¹Ì¾àÇÏ¿´°í, È°¹ßÇÑ À°¾ÆÁ¶Á÷ÀÇ Çü¼ºÀÌ °üÂûµÇ¾ú´Ù. °ø±Ø Å©
±â´Â bioglass ½ÇÇ豺ÀÌ HA ½ÇÇ豺¿¡ ºñÇØ ´õ¿í Å©°í ºÒ±ÔÄ¢ÇÏ¿´´Ù.
2. MT ¿°»ö ¼Ò°ß¿¡¼­´Â ´ëÁ¶±º, HA ¹× bioglass ½ÇÇ豺 °øÈ÷ 7ÀÏ°ºÎÅÍ ½Å»ý°ñÀÇ Çü¼ºÀÌ
°üÂûµÇ¾úÀ¸¸ç, 28ÀÏ°¿¡´Â ÁøÇàµÈ ¼®È¸È­°¡ °üÂûµÇ¾ú´Ù.
3. ¸é¿ªÁ¶Á÷È­ÇÐ ¿°»ö ¼Ò°ß¿¡¼­´Â bioglass ½ÇÇ豺ÀÌ HA ½ÇÇ豺¿¡ ºñÇØ ½Å»ý°ñ Çü¼º ºÎÀ§
ÀÇ Á¶°ñ¼¼Æ÷¿¡¼­ PCNA ¾ç¼º ¹ÝÀÀ °£¿±¼¼Æ÷ÀÇ ³·Àº È°¼ºµµ¸¦ º¸¿´´Ù.
4. ÁÖ»çÀüÀÚÇö¹Ì°æ ¼Ò°ß¿¡¼­´Â 7ÀÏ ÀÌÈÄ¿¡ HA ½ÇÇ豺Àº ´ëÁ¶±º¿¡ ºñÇØ HA¿¡ ºÎÂøµÈ ¼¶
À¯Á¶Á÷°ú °ñ¾çÁ¶Á÷ÀÇ Çü¼ºÀÌ °üÂûµÇ¾úÀ¸¸ç, bioglass ½ÇÇ豺¿¡¼­´Â Èí¼öµÈ bioglass»çÀÌ¿¡¼­
µµ °ñ¾çÁ¶Á÷ÀÇ Çü¼ºÀÌ °üÂûµÇ¾ú´Ù.
ÀÌ»óÀÇ ¼Ò°ßÀ¸·Î HA ½ÇÇ豺Àº ÁַΠǥ¸é¿¡ ¼¶À¯Á¶Á÷°ú °ñ¾çÁ¶Á÷ÀÌ ºÎÂøµÇ¸ç °ñÇü¼ºÀÌ
ÁøÇàµÇ¾ú°í ¸Å½ÄºÎÀ§¿¡¼­ ¹ÌºÐÈ­ °£¿±¼¼Æ÷ÀÇ ³ôÀº È°¼ºµµ¸¦ º¸¿´°í, bioglass ½ÇÇ豺Àº ºÒ±Ô
Ä¢ÇÏ°Ô Èí¼öµÈ bioglass»çÀÌ¿¡¼­µµ °ñ¾çÁ¶Á÷Çü¼ºÀÌ °üÂûµÇ¾úÀ¸¸ç ½Å»ý°ñ Çü¼ººÎÀ§ÀÇ Á¶°ñ¼¼
Æ÷¿¡¼­ PCNA ¾ç¼º ¹ÝÀÀÀÌ Áõ°¡µÇ´Â ¼Ò°ßÀ» º¸¿´´Ù.
#ÃÊ·Ï#
Bone or subsitute has been widely used for the reconstruction of bony defect
developed by trauma, infecton, cyst, tumor, congenital abnormality, etc.
Owing to its variety in quality and quantity, the use of alloplasts is increased rapidly.
Among the various graft materials, HA has been studied and applied in clinic most
extensively.
When HA applied to bony defect, it is considered to help the bone healing by
osteoconduction but tends to be encapsulated with fibrous tissue and floated in the
applied area by the lack of consolidation.
Bioglass is considered as a subsitute which can cover such weak point of HA.
Bone defect were artificially prepared in the calvaria of the rats followed by grafts of
HA and bioglass into defects.
Sequential sacrifice was peformed at the 3rd, 7th, 14th and 28th day of experiment.
The staining of the obtained specimen was performed with H&E, MT,
immunohistochemical stain and then histological examinations were carried out under the
light and scanning electron microscope.
1. In the features of H&E stain, infiltration of chronic inflammatory cell were present
in all group at the 3rd and 7th day of experiment with decrease at the 14th day in
bioglass group. The infiltration of inflammatory cells was more active in control and HA
group whereas the formation of granulation tissue was more active in bioglass group
was larger and more irregular than in HA group.
2. The features of MT stain showed new bone formation from the 7th day in all
group and the evidence of advanced calcification was observed at the 28th day.
3. In the features of immunohistochemical stain, bioglass group showed more PCNA
positive response in the osteoblasts at the site of new bone formation and the lower
activity of undifferentiated mesenchymal cells than HA group.
4. In scanning electron microscopic features, fibrous tissue formation and osteoid
attached to HA was observed in the HA group after the 7th day. In bioglass group,
osteoid formation was observed between the absorbed bioglass.
Generally in HA group, bone formation progressed with characteristic of the fibrous
and osteoid tissue mainly attached to the surface and the high activity of undifferented
mesenchymal cells was seen at the graft site.
In bioglass group, osteoid tissue formation was seen between the irregulary absorbed
bioglass and the increased PCNA positive response was observed in the osteoblast at
the new bone formation site.

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