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REMODELING PROCESS OF THE STREPTOZOTOCIN-INDUCED DIABETIC RAT

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Abstract

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ÇâÀ» ±¸¸íÇÏ°íÀÚ, ÀúÀÚµéÀº üÁß 250gm³»¿ÜÀÇ Sprague-Dawley°è ¿õ¼º ¹é¼­¿¡ üÁß §¸´ç70
§·ÀÇ streptozotocinÀ» ÁÖ»çÇÏ¿© ´ç´¢º´À» À¯¹ß½ÃŲ ½ÇÇ豺°ú µ¿·®ÀÇ »ý¸®½Ä¿°¼ö¸¦ ÁÖ»çÇÑ
´ëÁ¶±ºÀÇ ÇϾǰúµÎ¸¦ Àý´ÜÇÏ¿´´Ù. ÀÌµé ½ÇÇ赿¹°À» ½ÇÇè 1ÁÖ, 2ÁÖ, 3ÁÖ, 4ÁÖÈÄ¿¡ °¢°¢ Èñ»ý½Ã
Ų ´ÙÀ½ ÇϾǰñÀ» ÀûÃâÇÏ¿© ¿¬X¼±»çÁøÀ¸·Î ÇϾǰúµÎÀÇ Ä¡À¯ÇüÅÂ¿Í °ñ¼ÒÁÖÀÇ º¯È­¸¦ °üÂûÇÏ
°í, Hematoxylin-Rosin Áß¿°»ö°ú Toluidineblue¿°»öÀ» ½ÃÇàÇÏ¿© °ñÁ¶Á÷ÀÇ Çü¼ºÀ», Masson's
trichrome¿°»öÀ» ½ÃÇàÇÏ¿© ±³¿ø¼¶À¯¿Í ±Ù¼¶À¯¸¦ ±¤ÇÐÇö¹Ì°æÀ¸·Î °Ë°æÇÏ¿´À¸¸ç, Æí±¤Çö¹Ì°æ
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¶ó ´ëÁ¶±º¿¡ ºñÇÏ¿© ½ÇÇ豺¿¡¼­ Á¡Â÷ ºÒ±ÔÄ¢ÇÑ ÇüÅÂÀÇ ÀçÇü¼º°ñ°ú Ä¡¹ÐÇÑ °ñ¼ÒÁÖ°¡ ¶Ñ·ÇÀÌ
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ºÒ±ÔÄ¢ÇÏ°í °¡´Ã°Ô Çü¼ºµÇ¾ú´Ù.
5. Àç»ý°ñÀÇ °ñ±³¿øÁúÀº ¾ç±º °øÈ÷ ½ÇÇè±âÀÏÀÌ °æ°úµÊ¿¡ µû¶ó ¼º¼÷µÇ¾úÀ¸³ª, ½ÇÇ豺¿¡¼­
´Ù¼Ò ¹Ì¾àÇÏ¿´´Ù.
6. Àç»ý°ñ »óºÎ¸¦ ÇÇ°³ÇÏ´Â ¼¶À¯Á¶Á÷Àº ¾ç±º °øÈ÷ Ä¡¹ÐÇÏ°Ô ¹è¿­µÇ¾ú´Ù.
º» ¿¬±¸ÀÇ °á°ú, Á¤»ó¹é¼­¿¡ ºñÇÏ¿© ´ç´¢¹é¼­¿¡¼­ °ñ¾Æ¼¼Æ÷°¡ À§ÃàµÇ¾ú°í, °ñ±³¿øÁúÀÌ ¹Ì
¾àÇÏ°Ô Çü¼ºµÇ¾úÀ¸¸ç, °ñ¼ÒÁÖ°¡ °¡´Ã°í ºÒ±ÔÄ¢ÇÏ°Ô Çü¼ºµÇ¾ú´ø °ÍÀº °ñ¾Æ¼¼Æ÷ÀÇ ±â´ÉÀå¾Ö·Î
ÀÎÇÏ¿© °ñÇü¼º°úÁ¤ÀÌ Àå¾Ö¸¦ ¹Þ¾Ò±â ¶§¹®ÀÎ °ÍÀ¸·Î »ç·áµÈ´Ù.
#ÃÊ·Ï#
The purpose of this study was to investigate the remodeling process of the
streptozotocin-induced diabetic rat's resected condyle.
This experiment was performed with male Sprague-Dawly strain rats weighing
approximately 250 gm, which were rendered diabetic by an intravenous injection of
streptozotocin(70 §·/§¸ body weight).
Afterr condylectomy, experimental rats were serially terminated on the 1st week, the
2nd week, the 3rd week, and the 4th week. The following termination, the mandibles
were dissected out to make specimens. Each mandibular condyle was radiographer with
Hitex HA-80(Hitex Co., Ltd. Japan). In addition to radiographic observation, the
mandibular condyles, further decalcified and embedded in paraffin, were sectioned and
stained with Hematoxylin and Eosin, Toluidine blue and Masson's trichrome. They were
observed with a light microscope and a polarizing microscope.
The results were as follows.
1. Soft X-ray radiograms revealed proliferation of bone after 1 week in both groups.
Irregularly repaired bones and dense trabeculae were clearly observed in experimental
group.
2. The resected condyles were repaired by intramembraneous and endochondral bone
formation in both groups.
3. Bone tissue repair was initiated from the adjacent margin of resected bone, and
cartilaginous tissues were observed at the top of repaired bone in both groups.
4. The number of osteoblasts of experimental group was small, compared with control
group. Each osteoblast was small and flat. The thin trabeculae were irregularly formed.
5. Collagens of bone were gradually matured in both groups, but the degree of
maturation was lower in experimental group.
6. Fibrous tissues covered the upper parts of repaired bone were densely arranged in
the both groups.
Conclusively, atrophied osteoblasts, immature collagen of bone, and thin and irregular
trabeculae which were characterized in the diabetes experimental group showed diabetes
disturbed osteoblastic function and caused disturbance of remodeling process of bone.

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