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A CLINICAL STUDY ON PROGNOSIS OF INTRAORAL VERTICAL RAMUS OSTEOTOMY FOR MANDIBULAR SET-BACK IN THE MANDIBULAR PROGNATHISM.

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Abstract

°á·Ð
ÀúÀÚ´Â ÇϾǰñ Àüµ¹ÁõÀ¸·Î ±¸³» ÇϾǰñ »óÇàÁö ¼öÁ÷°ñ Àý´Ü¼ú(IVRO)À» ÀÌ¿ëÇÏ¿© ÇϾǰñ
À» ÈĹæ À̵¿½ÃŲ Çѱ¹ÀΠȯÀÚµéÀ» ´ë»óÀ¸·Î ¼ö¼úÈÄ ÇϾǿ ±â´ÉÀÇ ÀçÈ°(±â´É ÀçÈ° ¿¬±¸
±º, 38¸í) °ú ÇϾǰñ »óÇàÁöºÎ °ñÀýÆíµéÀÇ °ñÄ¡À¯ ¹× ÇüÅÂÀû º¯È­(ÇüÅ º¯È­ ¿¬±¸±º, 21¸í)
¸¦ ÀÓ»óÀûÀ¸·Î ¿¬±¸ÇÏ¿´´Ù. ±â´ÉÀçÈ°Àº ÃÖ´ëÀÇ °³±¸·®, Àü¹æ À̵¿·® ¹× ÁÂ/¿ìÃø Ãø¹æ À̵¿·®
À» ¾Ç°£°íÁ¤ Á¦°ÅÈÄ 15ÀÏ°±îÁö´Â ¸ÅÀÏ, ÀÌÈÄ´Â 1, 3, 6, 12, 18°³¿ù°¿¡ ÃøÁ¤ÇÏ°í, ÇüÅ º¯È­
´Â Panex, P-A cephalometrics ¹× Lateral Cephalometrics »ó¿¡¼­ °ñÄ¡À¯ ºÐ¼®À» À§ÇÑ 9°³
ÀÇ ÃøÁ¤°ªÀ» ¼³Á¤ÇÏ¿© ¼ö¼úÁ÷ÈÄ, ¼úÈÄ 1, 3, 6, 12°³¿ùÀÇ »çÁø»ó¿¡¼­ ÃøÁ¤ÇÏ¿© Ä¡·á °æ°ú½Ã±â
¿¡ µû¸¥ º¯È­ ¾ç»óÀ» ¿¬±¸ÇÑ ¹Ù ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
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ÃÖÃÊ 5ÀÏ°±îÁö ±Þ°ÝÈ÷ ȸº¹µÇ°í 15ÀÏ°±îÁö ¿Ï¸¸È÷ ȸº¹µÇ¸é¼­ °ÅÀÇ Á¤»ó ¼öÁØÀÎ Æò±Õ¿¡
µµ´ÞÇϸç ÀÌÈÄ ¼­¼­È÷ °è¼ÓÇÏ¿© Áõ°¡µÇ´Â Ãß¼¼¸¦ º¸¿´´Ù.
2. ÇÏ¾Ç ¿îµ¿ÀÇ ÀçÈ° Á¤µµ ¹× ¼Óµµ°¡ ¿¹»óº¸´Ù ¸Å¿ì ºü¸£°Ô ÁøÇàµÇ¾úÀ¸¸ç ÀÌ´Â ¾Ç°£°íÁ¤
Á¦°Å ÃʱâÀÇ Ã¼°èÀûÀÌ°í °­·ÂÇÑ ±â´ÉÀû ¹°¸®Ä¡·á¿¡ ¿µÇâÀ» ¹Þ¾Ò´Ù°í »ç·áµÈ´Ù.
3. °ñÀýÆíÀÇ Ä¡À¯¸¦ ÀÎÁöÇϱâ À§ÇÑ CSN, CA, DOAÀÇ º¯È­´Â ¼úÈÄ 1¡­3°³¿ù ±â°£ µ¿¾È
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º¯È­ ¾ç»óÀ» º¸¿´´Ù.
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5. ±Ù½É°ñÆíµéÀÇ ÃÖÃø¹æ °Å¸®(TL)´Â ¼úÈÄ 1°³¿ù±îÁö ±Þ¼ÓÇÑ º¯È­¸¦ º¸ÀÎ ÈÄ ¼úÈÄ 1³â°±î
Áö ÀÏÁ¤ÇÑ ºñÀ²·Î °è¼Ó °¨¼ÒÇÏ¿´´Ù.
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#ÃÊ·Ï#
Intraoral Vertical Ramus Osteotomy(IVRO) is a typical osteotomy procedure to setback
the mandible for the prognathic patients and has many advantages functionally and
morphologically, however, available data to predict the progressive prognosis on the
functional rehabilitation of the mandible and the morphological change of the rami of the
mandible after IVRO has been less reported.
This is a prospective study for the progressive changes on the functional rehabilitation
and the morphology of the rami of the mandible after IVRO for the Korean
Prognathisms.
38 patients were studied for the functional rehabilitation and 21 patients were for the
morphological change. Maxillo-Mandibular Fixation(MMF) was maintained for two
weeks after IVRO and active physiotherapy was applied by means of Park's Protocol
for next two weeks. Progressive change of the range of motion after release of MMF at
maximum mouth opening, protrusion, lateral excursion(right and left) was recorded daily
for 15days, and also recorded at 1st, 3rd, 6th, 12th, 18th months on the flow charts in
the group for functional rehabilitation study. Nine measurements were measured to
check morphological changes of the rami of the mandible at Immediate, 1, 3, 6 and 12
months postoperative period on Panex, P-A and Lateral Cephalometrics. The results
were obtained as followings :
1. Mandibular function was returned rapidly during early 5 days after release of
MMF, and reached to the almost normal range within 15days. And then slowly and
progressively increased more and more afterward.
2. Recovery rate of the mandibular function after IVRO was depended upon the
forcible application of a well-oriented protocol for active physiotherapy during early
stage(within 15 days) after release of MMF.
3. Evidences of cortex-to-cortex healing between proximal and distal segments of the
Mandible(CNS, CA, DOA on Panex) were definitely observed. They were changed
slowly from immediate to 3 months but changed remarkably from 3 to 6 months of
postoperative period, and then showed continuous but very slow changes afterward.
4. Vertical lengths of the proximal segments(RL, LL) were reduced remarkably from
immediate to 3 month of postoperative period, and more slowly reduced from 3 to 6th
month period, and then constantly reduced afterward as mimic rate.
5. Transverse distance between proximal segments(TL) was reduced rapidly within
one month postoperatively and showed more slow and stable changes until one year
follow-up period.
6. The gap between proximal and distal segments was disappeared rapidly within 6
month postoperatively, and then reduced very slowly afterward.
7. The change of Gonial angle(GA) was rapidly increased within one month of
postoperative period and then increased very slowly afterward.
In summary, mandibular function was returned to almost normal within two weeks
after release of MMF, and osseous union was completely established between the
proximal and distal segments without any complications in spite of early functional
movement of the mandible without fixation between fragments. Morphological changes
on the rami of the mandible was remarkable within 3 month period of postoperative and
then continuously remodeled until one-year follow-up period. The application of a
forcible and well-oriented protocol of active physiotherapy immediate after release of
MMF may be the most important factor for prognosis of rehabilitation and morphological
changes in IVRO.

Å°¿öµå

IVRO; Rehabilitation; Morphologic change; Orthognathic surgery;

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