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AN EXPERIMENTAL STUDY OF MANDIBULAR FRACTURE WOUND HEALING IN THE CALCIUM DEFICIENT RAT

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Abstract

ÀúÀÚµéÀº °ñ´Ù°øÁõÀÌ °ñÀýÀÇ Ä¡À¯¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ±¸¸íÇÏ°íÀÚ, 10ÁÖ·ÉÀÇ Wistar°è ¿õ¼º
¹é¼­¸¦ ´ëÁ¶±º°ú ½ÇÇ豺À¸·Î ³ª´©¾î ´ëÁ¶±º¿¡´Â Á¤»ó½ÄÀ̸¦, ½ÇÇ豺¿¡´Â ÀúÄ®½·½ÄÀ̸¦ °¢°¢
3ÁÖ°£ Åõ¿©ÇÑ ÈÄ ¾ç±º ¸ðµÎ ÇϾǰ¢ºÎÀ§¿¡ ÀΰøÀûÀÎ °ñÀýÀ» À¯¹ß½ÃÄ×´Ù. °ñÀý ÈÄ 7ÀÏ, 14ÀÏ,
21ÀÏ, 28ÀÏ,42ÀÏ,56ÀÏ¿¡ °¢°¢ ÇϾǰñÀ» ÀûÃâÇÏ¿© À̵éÀ» ¿¬X¼±»çÁøÃÔ¿µ¹ýÀ¸·Î °ñÁ¶Á÷ÀÇ Çü¼º
»óŸ¦, 99mTc-MDP¸¦ ÀÌ¿ëÇÑ °ñ½ºÄµ¹ýÀ¸·Î Á¶°ñ´ÉÀ» ºñ±³, Æò°¡ÇÏ¿´À¸¸ç,
º´¸®Á¶Á÷ÇÐÀû ¹æ¹ýÀ¸·Î °ñÀýºÎÀ§ÀÇ Á¶Á÷º¯È­¾ç»óÀ» °üÂûÇÏ¿´´ø ¹Ù, ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò
¾ú´Ù.
1. Á¤»ó½ÄÀ̱ºÀº ½ÇÇè 14Àϱº¿¡¼­ºÎÅÍ, ÀúÄ®½·½ÄÀ̱ºÀº ½ÇÇè 21Àϱº¿¡¼­ºÎÅÍ °ñÀýºÎÀ§ÀÇ
¹æ»ç¼±Åõ°ú¼ºÀÌ °¨¼ÒµÇ±â ½ÃÀÛÇÏ¿© Á¤»ó½ÄÀ̱ºÀº ½ÇÇè 42Àϱº¿¡¼­, ÀúÄ®½·½ÄÀ̱ºÀº ½ÇÇè 56
Àϱº¿¡¼­ ¹æ»ç¼±Åõ°ú¼ºÀÌ ¼Ò½ÇµÇ¾ú´Ù.
2. Á¤»ó½ÄÀ̱ºÀº ½ÇÇè 14Àϱº¿¡¼­, ÀúÄ®½·½ÄÀ̱ºÀº ½ÇÇè 21Àϱº¿¡¼­ °ñÀýºÎÀ§ÀÇ
99mTcÀÇ ¼·ÃëÀ²ÀÌ °¡Àå Áõ°¡µÇ¾ú´Ù°¡ ¾ç±º °øÈ÷ ½ÇÇè±âÀÏÀÇ °æ°ú¿¡ µû¶ó ÀÌ
ÀÇ ¼·ÃëÀ²ÀÌ °¨¼ÒµÇ¾úÀ¸³ª, ÀúÄ®½·½ÄÀ̱º¿¡¼­´Â Á¤»ó½ÄÀ̱º¿¡ ºñÇÏ¿© 99mTc
ÀÇ ¼·ÃëÀ²ÀÌ ³·¾Ò´Ù.
3. Á¤»ó½ÄÀ̱ºÀº ½ÇÇè 42Àϱº¿¡¼­ ÁÖÀ§ °ñÁ¶Á÷°ú À¯»çÇÑ ½Å»ý°ñ¼ÒÁÖÀÇ Çü¼ºÀÌ °üÂûµÇ¾úÀ¸
³ª, ÀúÄ®½·½ÄÀ̱ºÀº ½ÇÇè 56Àϱº¿¡¼­ ½Å»ý°ñ¼ÒÁÖ°¡ À§¾àÇÏ¿´°í, ºÒ±ÔÄ¢ÇÏ¿´À¸¸ç, Ä¿´Ù¶õ °ñ
¼ö°­ÀÌ °üÂûµÇ´Â °ñ´Ù°øÁõÀÇ ¼Ò°ßÀÌ ¶Ñ·ÇÇÏ¿´´Ù.
ÀÌ»óÀÇ ½ÇÇè°á°ú·ÎºÎÅÍ Á¤»ó½ÄÀ̱º°ú ÀúÄ®½·½ÄÀ̱º ¸ðµÎ¿¡¼­ °ñÀýÀÇ Ä¡À¯´Â ÀÌ·ç¾îÁö³ª,
ÀúÄ®½·½ÄÀ̱º¿¡¼­´Â Á¤»ó½ÄÀ̱º¿¡ ºñÇÏ¿© ½Å»ý°ñÀÇ Çü¼º·®ÀÌ °¨¼ÒµÇ¸ç, °ñÀýÀÇ Ä¡À¯°¡ Áö¿¬
µÊÀ» ¾Ë ¼ö ÀÖ¾ú´Ù. µû¶ó¼­ °ñ´Ù°øÁõ½Ã °ñÀýÀÇ ¼º°øÀûÀÎ Ä¡À¯¸¦ À§ÇÏ¿©´Â °ñ´Ù°øÁõÀÇ ¹ß»ý
¿äÀÎ µî¿¡ ´ëÇÑ Ã³Ä¡°¡ ¼±ÇàµÇ¾î¾ß Çϸç, Ä®½·´ë»çÀÇ º¯È­¿Í Á¶°ñ¼¼Æ÷ ¹× ÆÄ°ñ¼¼Æ÷ÀÇ ±â´É
¿¡ ´ëÇÑ º¸´Ù »ó¼¼ÇÑ ¿¬±¸°¡ ÇÊ¿äÇÒ °ÍÀ¸·Î »ç·áµÈ´Ù.
#ÃÊ·Ï#
The purpose of this study was to investigate effects of osteoporosis on fracture
wound healing in the calcium deficient rat.
To research the experiment some ten-week old Wistar strain rats with approximately
300 guts weight were selected. Then, the rats were divided into two groups: Normal
diet group(rats given a normal diet before and after bone fracture) and Low calcium diet
group(rats given a low calcium diet before and after bone fracture). Both groups had
been provided with each diet for three weeks. When the rats became thirteen weeks old,
the mandibular angle of rats in both groups was artificially fractured for test. The
healing of fracture wounds was reviewed by using soft x-ray radiography and
99mTc-MDP bone scan and also histopathologic examination.
The obtained results were as follows .
1. The radiolucency of the fracture site for the Normal diet group started to decrease
from the 14th day since the experiment was made, while the Low calcium diet group
began decrease in the radiolucency from the 21st day of the experiment. The
radiolucency thor the Normal diet group disappeared at the 42nd day, but one for the
Low calcium diet group disappeared at the 56th day of the experiment.
2. The highest uptake rate of 99mTc-MDP stood at the 14th day of the
experiment in the Normal diet group and the Low calcium diet group's maximum rate
was recorded at the 21st day of the experiment. These both groups were gradually
experiencing decrease in the uptake rate as the experiment time was going on. However,
the uptake rate in the Low calcium diet group was lower than one in the Normal diet
group.
3. For the Normal diet group, the newly formed trabeculae, which were similar to one
of the surrounding bone, were seen at the 42nd day of the experiment. On the other
hand, the Low calcium diet group showed at the 56th day of the experiment that the
osteoporotic findings looked weak, irregular trabeculae, and also large bone marrow
space were observed clearly.
As a result of the above experiment, it is said that the healing of the fracture can be
completed for both groups, the Normal diet group and the Low calcium diet group.
However, the amount of the newly formed bone wound in the Low calcium diet group
is rather decreased compared to one in the Normal diet group and at the same time the
healing of the fracture is delayed in the Low calcium diet group. Consequently, for the
successful healing of fracture in osteoporosis, it is considered that the management of
the etiologic factors of osteoporosis must be preceded. The more study of calcium
metabolism and functions of osteoblast and osteoclast needs to proceed on.

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