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Morphological analysis of the temporomandibular joint in patients with malocclusion using three-dimensional models

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¾ÈÇö³ª, ÀüÀº¿µ, ¹Ú»ç¹ü, ÀÌÁ¤Çö, ¹ÚÁ¾ÅÂ,
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¾ÈÇö³ª ( Ahn Hyun-Na ) - Dankook University College of Dentistry Department of Oral Anatomy
ÀüÀº¿µ ( Jeon Eun-Young ) - Dankook University College of Dentistry Department of Oral Anatomy
¹Ú»ç¹ü ( Park Sa-Beom ) - Dankook University College of Dentistry Department of Oral Anatomy
ÀÌÁ¤Çö ( Lee Jeong-Hyun ) - Dankook University College of Dentistry Department of Oral Anatomy
¹ÚÁ¾Å ( Park Jong-Tae ) - Dankook University College of Dentistry Department of Oral Anatomy

Abstract

Class II TMJÀÇ ÇüÅÂÇÐÀû ¿¬±¸´Â ÇüÅÂ¿Í ±â´É »çÀÌÀÇ »óÈ£ ¿¬°ü¼ºÀ» ÀÌÇØÇϴµ¥ Áß¿äÇÏ´Ù. ÀÌ¿¡ º» ¿¬±¸´Â ºÎÁ¤±³ÇÕ¿¡ ÀÇÇÑ TMJÀÇ º¯À̸¦ ÀÌÇØÇϱâ À§ÇØ Class II¿Í Á¤»ó±³ÇÕÀÚÀÇ TMJÀÇ ÇüÅÂÇÐÀû ¸Å°³º¯¼ö¸¦ °èÃøÇÏ¿© ºñ±³ÇÏ¿´´Ù. 3D¸ðµ¨¿¡¼­ ´ë»óÀÚÀÇ HCA, CCA, CCWÀ» °èÃøÇÏ¿© TMJ ÇüŸ¦ ºÐ¼®Çß´Ù. ºÎÁ¤±³ÇÕÀ¯Çü¿¡ µû¸¥ TMJÀÇ Â÷À̸¦ »ìÆ캻 °á°ú, ³²¼º°ú ¿©¼º ¸ðµÎ Á ¿ìÃø HCA¿Í CCA¿¡¼­ ¸ðµÎ À¯ÀÇÇÑ °á°ú°¡³ªÅ¸³µ´Ù. ¹Ý¸é CCW´Â Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù. ¼ºº°¿¡ µû¸¥ TMJÀÇ Â÷À̸¦ È®ÀÎÇØ º» °á°ú, Á¤»ó±³ÇÕÀÚÀÇ CCW¿¡¼­ Á ¿ìÃø¿¡¼­ ¸ðµÎ À¯ÀÇÇÑ °á°ú°¡ ³ªÅ¸³µ´Ù. ¹Ý¸é HCA, CCA´Â Åë°èÀûÀ¸·Î À¯ÀÇÇÑÂ÷ÀÌ°¡ ¾ø¾ú´Ù. Class IIÀÇ °æ¿ì HCA, CCA, CCW¿¡¼­ ÁÂÃø°ú ¿ìÃø¿¡¼­ ¸ðµÎ À¯ÀÇÇÑ °á°ú°¡ ³ªÅ¸³µ´Ù. º»¿¬±¸¿¡¼­´Â »óÀÇ ¿Ö°î ¾øÀÌ ½ÇÃøÄ¡¸¦ ¾òÀ» ¼ö ÀÖ´Â Mimics software¸¦ ÀÌ¿ëÇÏ¿©, À°¾ÈÀ¸·Î °üÂûÇϱ⠾î·Á¿îcondyleÀÇ ÇüŸ¦ 3D¸ðµ¨·Î À籸¼ºÇÏ¿© ºÐ¼®ÇÏ¿´´Ù. ÀÌ °á°ú´Â TMJ ÇüÅ¿¡ ´ëÇÑ ´õ ±íÀº ÅëÂû·ÂÀ» Á¦°øÇϸç, Class IIÀÇ condyleÀº °üÀýÅë, µð½ºÅ© õ°ø ¶Ç´Â TMJ ±â´ÉÀå¾Ö·Îµµ À̾îÁú ¼ö ÀÖ´Ù´Â °ÍÀ» ¾Ï½ÃÇÑ´Ù. ¶ÇÇÑ ÇâÈÄ ¿¬±¸°¡ °èȹµÉ ¼ö ÀÖ´Â ±âÁØ µ¥ÀÌÅ͵µ Á¦°øÇÒ °ÍÀÌ´Ù.

Studying the morphology of the temporomandibular joint (TMJ) in Class II malocclusion is important for understanding the relevant interrelationship between form and function. The present study was conducted with the aim of understanding malocclusion-induced TMJ variations by measuring and comparing major morphological parameters of the TMJ between Class II malocclusion and normal occlusion. The skull was reconstructed into a 3D model to measure the horizontal condylar angle (HCA), coronal condylar angle (CCA), and coronal condylar width (CCW). As for the differences in TMJ morphology depending on the occlusion type, significant differences were observed in the left and right HCA and CCA, but not in the CCW among males and females. With regard to differences between sexes in the TMJ morphology, there were significant differences between male and female subjects in the normal occlusion group in the left and right CCWs. In contrast, no statistically significant differences between sexes were observed in the HCA or CCA. In the Class II malocclusion group, significant differences were observed between male and female subjects in all morphological parameters of the TMJ. Since the variations in condylar morphology are difficult to discern by visual inspection only, we constructed a 3D model of the condyle using Mimics software. These findings provide a deeper insight into TMJ morphology and imply that the shape of the condyle in Class II malocclusion may lead to arthralgia, TMJ disc perforation, or TMJ dysfunction. The results of this study are expected to serve as fundamental data for utilization in future studies.

Å°¿öµå

3D ÃøÁ¤; ºÎÁ¤±³ÇÕ; ÅΰüÀý
3D measurement; malocclusion; TMJ; Mimics

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