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THE MANDIBULAR GROWTH EFFECT OF THE BOTULINUM TOXIN TYPE A INJECTION INTO UNILATERAL MASSSTER MUSCLE OF GROWING RAT

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Abstract

¼ºÀå ½Ã±â°¡ ´Ù¸¥ ÁãÀÇ ÆíÃø ±³±Ù¿¡ º¸Åø¸®´® AÇü µ¶¼Ò¸¦ ÁÖ»çÇÏ¿© ÇϾǰñ ¼ºÀå¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ¾Ë¾Æº¸°íÀÚ ÇÏ¿´´Ù. °¢±â ´Ù¸¥ ÁÖ·ÉÀÇ Áã(N=36, 1±º: 4ÁÖ·É, 2±º: 5ÁÖ·É, 3±º: 6ÁÖ·É)¸¦ ´ë»óÀ¸·Î ½ÇÇèÀ» ½ÃÇàÇÏ¿´À¸¸ç °¢ ±ºÀº ´Ù½Ã ´ëÁ¶ ±º, ÆíÃøÁֻ籺, ¾çÃøÁֻ籺À¸·Î ³ª´©¾î ÇϾǰñÀÇ ±æÀ̸¦ °èÃøÇÏ°í ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù. 1. 1±º¿¡¼­ ÆíÃøÁֻ籺ÀÇ ÁÖ»çÃø°ú ¾çÃøÁֻ籺 ¸ðµÎ ÇϾÇü ±æÀÌ, °úµÎ ³ôÀÌ°¡ ´ëÁ¶±º º¸´Ù ³·Àº °ªÀ» º¸¿´´Ù(p<0.05). 2. 2±º¿¡¼­ ÆíÃøÁֻ籺ÀÇ ÁÖ»çÃø°ú ¾çÃøÁֻ籺 ¸ðµÎ ÇÏ¾Ç Àü¹æºÎ ³ôÀÌ¿Í °úµÎ³ôÀÌ¿¡¼­ ´ëÁ¶±º º¸´Ù ³·Àº °ªÀ» º¸¿´´Ù (p<0.05). 3. 3±º¿¡¼­ ÆíÃøÁֻ籺ÀÇ ÁÖ»çÃø°ú ¾çÃøÁֻ籺 ¸ðµÎ ÇϾÇü ±æÀÌ¿Í °úµÎ ³ôÀÌ, °úµÎµ¹±â ³ôÀÌ°¡ ´ëÁ¶±º º¸´Ù ³·Àº °ªÀ» º¸ ¿´´Ù(p<0.05). 4. ¼¼ ±º ¸ðµÎ ÆíÃøÁֻ籺ÀÇ ¾çÃø ºñ±³½Ã Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Â÷ÀÌ´Â ¾ø¾úÀ¸³ª ÁÖ»çÃøÀº ´ëÁ¶Ãø º¸´Ù ³·Àº °èÃø°ªÀ» º¸ÀÌ´Â °æÇâÀÌ °üÂûµÇ¾ú´Ù(p>0.05).

The purpose of this study was to assess the effect on mandibular growth of botulinum toxin type A (BTXA) injection into the unilateral massester muscle of growing rats at three different growing stages. Thirty six male Sprague-Dawley rats were divided into three groups according to the age (group 1: 4 weekold, group 2: 5week-old, group 3: 6week-old). Then each group was randomly divided into 3 subgroups (control group, unilateral injection group, bilateral injection group). Experimental animals were sacrificed after 4 weeks. Then the jaw measurements were evaluated. The results were as follows: 1. In the group 1, mandibular body length, condylar height and coronoid process height of the unilateral group(BTXA side) and the bilateral group were shorter than those of the control group (p<0.05). 2. In the group 2, anterior region height, condylar height, coronoid process height of the unilateral group (BTXA side) and the bilateral group were shorter than those of the control group (p<0.05). 3. In the group 3, mandibular body length, condylar height, coronoid process height of the unilateral group (BTXA side) and the bilateral group were shorter than those of the control group (p<0.05). 4. There was no significant difference in mandibular measurements between the control side and the injection side in the unilateral group in all age groups (p>0.05).

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Botulinum type A toxin;Mandibular growth;Functional matrix

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