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Dentofacial changes of non-orthodontically treated female patients with TMJ disk displacement: a longitudinal cephalometric study

Korean Journal of Orthodontics 2010³â 40±Ç 6È£ p.398 ~ 410
ÇÑÁ¤¿ì, ±èÅ¿ì,
¼Ò¼Ó »ó¼¼Á¤º¸
ÇÑÁ¤¿ì ( Han Jung-Woo ) - ´ëÇѹα¹ À°±º
±èÅ¿ì ( Kim Tae-Woo ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°ú±³Á¤Çб³½Ç

Abstract

°üÀý¿ø¹Ýº¯À§°¡ ÀÖ´Â ¿©ÀÚ È¯ÀÚ Áß ÃÊÁø ½Ã¿Í ÀÏÁ¤ ½Ã°£ÀÌ Áö³­ ±â°£ µ¿¾È ±³Á¤ Ä¡·á¸¦ ºñ·ÔÇÑ ±³ÇÕ¿¡ º¯È­¸¦ ÁÙ¸¸ÇÑ Ä¡·á¸¦ ¹ÞÁö ¾ÊÀº ¿©¼º ȯÀÚ¸¦ ´ë»óÀ¸·Î µÎ ½Ã±âÀÇ Ãø¸ðµÎºÎ°èÃø¹æ»ç¼± »çÁøÀ» ºñ±³ÇÏ¿© °ñ°Ý ¹× Ä¡¼º º¯È­¸¦ °üÂûÇÒ ¸ñÀûÀ¸·Î ½ÃÇàµÇ¾ú´Ù. 1996³â 1¿ùºÎÅÍ 2006³â 12¿ù »çÀÌ¿¡ ¼­¿ï´ëÇб³ Ä¡°úº´¿ø Ä¡°ú±³Á¤°ú¿¡ ³»¿øÇÑ ¿©ÀÚ È¯ÀÚ Áß MRI¸¦ ÃÔ¿µÇÏ¿© °üÀý¿ø¹Ýº¯À§°¡ Àִ ȯÀÚ¸¦ ¼±º°ÇÏ¿´À¸¸ç, ÃÑ 25¸íÀÇ È¯ÀÚ¸¦ ´ë»óÀ¸·Î ¿¬±¸¸¦ ÇÏ¿´´Ù. ÃÊÁø(T1) ½ÃÀÇ È¯ÀÚÀÇ Æò±Õ ¿¬·É(Ç¥ÁØÆíÂ÷)Àº 18.1¼¼(3.5¼¼)ÀÌ¸ç ¿¬·ÉÀÇ ¹üÀ§´Â 14.2 - 25.8¼¼ÀÌ°í, ÀçÁø(T2)½Ã Æò±Õ ¿¬·É(Ç¥ÁØÆíÂ÷)Àº 21.1¼¼(3.5¼¼)ÀÌ¸ç ¿¬·ÉÀÇ ¹üÀ§´Â 16.2 - 28.0¼¼¿´´Ù. ¶ÇÇÑ Æò±Õ °üÂû ±â°£(Ç¥ÁØÆíÂ÷)Àº 3.0³â(1.9³â)À̾ú°í ¹üÀ§´Â 7°³¿ùºÎÅÍ 6.7³âÀ̾ú´Ù. ÃÊÁø(T1), ÀçÁø(T2) ½Ã¿Í µÎ ±â°£ »çÀÌ º¯È­·®¿¡ ´ëÇÑ °¢ º¯¼öÀÇ ±â¼ú Åë°è·®À» °è»êÇÏ¿´´Ù. ÀÌ»óÀÇ °á°ú·ÎºÎÅÍ ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù. MRI·Î °üÀý¿ø¹Ýº¯À§¸¦ Áø´Ü¹ÞÀº ȯÀÚ Áß ±³Á¤Ä¡·á³ª ¾Ç°üÀý Ä¡·á µî ±³ÇÕ¿¡ º¯È­¸¦ ÁÙ ¸¸ÇÑ Ä¡·á¸¦ ¹ÞÁö ¾ÊÀº ȯÀÚÀÇ ¾à 64%¿¡¼­ ÇϾǰñÀÇ °ñ°ÝÀûÀÎ º¯È­°¡ ³ªÅ¸³µ´Ù. L1 to Mandibular planeÀº 0.8 mm À¯ÀǼº ÀÖ°Ô Áõ°¡ÇÏ¿´´Ù (p £¼ 0.01). ±×·¯³ª À̸¦ Á¦¿ÜÇÑ ³ª¸ÓÁö Ä¡¼º °èÃø Ç׸ñÀÎ ÀüÄ¡µ¹Ãâµµ, ÀüÄ¡ÇÇ°³µµ ¹× U1 to Palatal plane (mm)ÀÇ º¯È­´Â À¯ÀǼºÀÌ ¾ø¾ú´Ù. º¯È­ÀÇ ¹æÇâÀº ÁÖ·Î ÇϾÇÀÇ ÈÄÇÏ ¹æȸÀüÀ̾ú°í, ±× ºñÀ²Àº FMA°¡ 1o Áõ°¡ ½Ã SNB´Â ¾à 0.43o °¨¼ÒÇÏ´Â Á¤µµ¿´´Ù (Spearman¡¯s rho = ?0.660, p£¼ 0.01). ÀϺΠȯÀÚµéÀº ¼öÆòÀûÀÎ ÇϾǰñÀÇ ÈÄ¹æ ¾ç»ó À̵¿À» º¸À̱⵵ ÇÏ¿´´Ù.

Objective: The purpose of this study was to investigate the changes in dentofacial morphology of non-orthodontically treated female patients with TMJ disk displacement.

Methods:The sample consisted of 25 Korean female patients with bilateral TMJ disk displacement who visited the Department of Orthodontics, Seoul National University Dental Hospital from 1996 to 2006. Disk displacements were diagnosed using the magnetic resonance imaging (MRI) of both TMJs. Baseline (T1) and follow-up (T2) lateral cephalograms were analyzed. The mean age of samples at T1 was 18.1 ¡¾ 3.5 years (range 14.2 - 25.8 years) and at T2, 21.1 ¡¾ 3.5 years (range 16.2 - 28.0 years). The mean observation period was 3.0 ¡¾ 1.9 years. Descriptive statistics for each variable were calculated at baseline (T1) and follow-up (T2) stages, and during the observation period (T2-T1).
Results: Skeletal changes were found in 64% of the non-orthodontically treated female patients with TMJ disk displacement during the observation period. The L1 to Mandibular plane distance (mm) increased significantly by 0.8 mm
(p £¼ 0.01). But there were no significant differences in the other dental relationship variables (overjet, overbite, U1 to palatal plane) during the observation period. Most patients with skeletal changes showed a backward rotation of the mandible. The ratio of the rotation was a decrease of SNB by 0.43o for every 1o increase of FMA (Spearman rho = ?0.660, p £¼ 0.01). A few patients showed a distal shift of the mandible without rotation or significant changes in the vertical dimension.

Conslusions: During observation periods without orthodontic treatment, non-growing patients with TMJ disk displacement showed dentoskeletal changes, mainly backward rotation of the mandible.

Å°¿öµå

ÃøµÎÇϾǰüÀýÀå¾Ö; Á¾Àû ¿¬±¸; Ä¡¿­ ¹× ¾È¸ð º¯È­ ¿¬±¸; MRI
Temporomandibular disorder; Longitudinal study; Dentofacial change; MRI

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