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Finite Element Analysis of Stress Distribution in using Face Mask according to Traction Point

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¿À±³Ã¢ ( Oh Kyo-Chang ) - ´Ü±¹´ëÇб³
Á¤µ¿È­ ( Jung Dong-Hwa ) - ´Ü±¹´ëÇб³ Ä¡°ú´ëÇÐ ±³Á¤Çб³½Ç
Â÷°æ¼® ( Cha Kyung-Suk ) - ´Ü±¹´ëÇб³ Ä¡°ú´ëÇÐ ±³Á¤Çб³½Ç

Abstract

ÈÑÀ̽º ¸¶½ºÅ©(Face mask)¸¦ »ç¿ëÇÏ¿© »ó¾ÇÀ» °ßÀÎÇÏ¿´À» ¶§, µÎ°³¾È¸é º¹ÇÕüÀÇ »ý¿ªÇÐÀû ¹ÝÀÀÀ» ÀÌÇØÇÏ´Â °ÍÀº ÀÓ»óÀûÀ¸·Î ¸Å¿ì Áß¿äÇÏ´Ù. ÀÌ ¿¬±¸ÀÇ ¸ñÀûÀº face mask¸¦ »ç¿ëÇÏ¿© »ó¾Ç Á¦ 1 ¼Ò±¸Ä¡¿Í Á¦ 1 ´ë±¸Ä¡¿¡¼­ »ó¾ÇÀ» Àü¹æÀ¸·Î °ßÀÎÇÏ¿´À» ¶§ µÎ°³ºÀÇÕ±¸Á¶¿¡ ¹ß»ýÇÏ´Â ÀÀ·Â ºÐÆ÷¸¦ ºÐ¼®ÇÏ´Â °ÍÀÌ´Ù. 13¼¼ 6°³¿ù µÈ ³²ÀÚ È¯ÀÚÀÇ À¯ÇÑ¿ä¼ÒºÐ¼®À» À§ÇÏ¿© Àü»êÈ­´ÜÃþ»çÁø ÃÔ¿µÀ¸·Î ¾òÀº DICOM ¿µ»óÁ¤º¸¸¦ °³Àοë ÄÄÇ»ÅÍ·Î ¿Å±ä ÈÄ 3Â÷¿ø ¿µ»óÇÁ·Î±×·¥ÀÎ Mimics¢ç(Materialise, Germany)¸¦ »ç¿ëÇÏ¿© ¾òÀº 24°³ÀÇ ¹°¼ºÀ¸·Î ÀÌ·ç¾îÁø »ó¾Ç¸ðµ¨°ú, Á¦1¼Ò±¸Ä¡¿Í Á¦1´ë±¸Ä¡, RMEÀÇ ÇùÃøºÎ, RMEÀÇ ¼³ÃøºÎÀÇ 4°¡Áö ±¸¼º¿ä¼Ò¸¦ °¢±â Nastran ÆÄÀÏÇü½ÄÀÎ ¡°out¡±À¸·Î ÀúÀåÇÏ°í Patran¿¡¼­ ÇÕüÇÑ µÎ°³¾È¸é º¹ÇÕüÀÇ 3Â÷¿øÀû À¯ÇÑ¿ä¼Ò¸ðµ¨À» »ý¼ºÇÏ¿´´Ù. »ý¼ºµÈ ¸ðµ¨Àº Á¦1¼Ò±¸Ä¡¿¡¼­ FH Æò¸éÀÇ 45µµ ÇϹæÀ¸·Î, Á¦ 1 ´ë±¸Ä¡¿¡¼­ FH Æò¸éÀÇ 20µµ ÇϹæÀ¸·Î 500gÀÇ Àü¹æ°ßÀηÂÀ» ÁÖ¾ú´Ù. »ó¾Ç Á¦1¼Ò±¸Ä¡¿¡¼­ 45µµ ÇϹæÀ¸·Î °ßÀÎÇÏ¿´À» ¶§ xÃà¿¡¼­´Â ´ë±¸Ä¡ºÎÀ§ÀÇ È®Àå°ú ¼Ò±¸Ä¡ºÎ¿¡¼­ÀÇ ÇùÂøÀ» º¸¿´°í Ãִ뺯À§·®Àº 0.00011mm¿´´Ù. yÃà¿¡¼­´Â Àü¹ÝÀûÀ¸·Î Àü¹æÀ̵¿À» º¸¿´À¸¸ç ÃÖ´ë 0.00030mmÀÇ º¯À§¿Í ¼Ò±¸Ä¡ºÎÀ§ÀÇ º¯ÇüÀÌ ÄÇ´Ù. zÃà¿¡´Â ¼Ò±¸Ä¡ºÎÀ§¿¡¼­ ÇϹæÀ¸·Î ÃÖ 0.00036mm À̵¿Çß°í, »ó¾Çº¹ÇÕü°¡ ÀüÇϹæÀ¸·Î À̵¿ÇÏ¿´´Ù. Á¦ 1 ´ë±¸Ä¡¿¡¼­ÀÇ 20µµ ÇϹæ°ßÀÎ ÇÏ¿´À» ¶§, xÃà¿¡¼­´Â ´ë±¸Ä¡ºÎÀ§ÀÇ ÇùÂø°ú lateral nasal wallÀÇ È®ÀåÀ» º¸À̸ç ÃÖ´ë º¯À§´Â 0.001mm¿´´Ù. yÃà¿¡¼­´Â ÀüüÀûÀÎ Àü¹æÀ̵¿À» º¸À̸ç, Ãִ뺯À§´Â 0.004mm¿´´Ù. zÃà¿¡¼­´Â ¼Ò±¸Ä¡¿Í ´ë±¸Ä¡ Áß°£ºÎÀ§¸¦ Áß½ÉÀ¸·Î ANS´Â »ó¹æÀ¸·Î pterygoid plate´Â ÇϹæÀ¸·Î ¹Ý½Ã°è¹æÇâÀÇ È¸Àü¾ç»óÀ» º¸¿´À¸¸ç Ãִ뺯À§´Â 0.002mm¿´´Ù.

The objective of this study was to analyse stress distribution of maxillary complex by use of face mask. The construction of the three-dimensional FEM model was based on the computed tomography(CT) scans of 13.5 years-old male subject. The CT image were digitized and converted to the finite element model by using the mimics program, with PATRAN. An anteriorly directed force of 500g was applied at the first premolar 45 degrees downwards to the FH plane and at the first molar 20 degrees downwards to the FH plane. When 45 degrees force was applied at maxillary first premolar, there were observed expansion at molar part and constriction at premolar part. The largest displacement was 0.00011mm in the x-axis. In the y-axis, anterior displacement observed generally 0.00030mm at maximum. In the z-axis, maxillary complex was displaced 0.00036 mm forward and downward. When 20 degrees force was applied at maxilla first molar, there were observed expansion at lateral nasal wall and constriction at molar part. The largest displacement was 0.001mm in the X-axis. In the Y-axis, anterior displacement observed generally 0.004mm at maximum. In the Z-axis, ANS was displaced upward and pterygoid complex was displaced downward. The largest displacement was 0.002mm.

Å°¿öµå

Àü»êÈ­´ÜÃþ»çÁø;À¯ÇÑ¿ä¼Ò¸ðµ¨;ÈÑÀ̽º ¸¶½ºÅ©;ÀÀ·Â ºÐÆ÷
face mask;finite element model;stress distribution;traction

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