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A three-dimensional finite element analysis of obturator prosthesis for edentulous maxilla

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¼Û¿ì¼® ( Song Woo-Seok ) - ¼­¿ï´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
±è¸íÁÖ ( Kim Myung-Joo ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°úº¸Ã¶Çб³½Ç
ÀÓ¿µÁØ ( Lim Young-Jun ) - ¼­¿ï´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
±ÇÈ£¹ü ( Kwon Ho-Beom ) - ¼­¿ï´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç

Abstract

¿¬±¸¸ñÀû:ÀÌ ¿¬±¸ÀÇ ¸ñÀûÀº »ïÂ÷¿ø À¯ÇÑ¿ä¼Ò ºÐ¼®¹ýÀ» ÀÌ¿ëÇÏ¿© ¹«Ä¡¾Ç ±¸°³°á¼Õ ȯÀÚ¿¡ »ç¿ëµÇ´Â Æó¼âÀåÄ¡ÀÇ ÀÀ·Â ¹× º¯À§¸¦ ÃøÁ¤ÇÏ°í À̸¦ ÃÑÀÇÄ¡ ¸ðÇü°ú ºñ±³ÇÏ´Â °ÍÀÌ´Ù.

¿¬±¸ Àç·á ¹× ¹æ¹ý: ¹«Ä¡¾Ç ȯÀÚÀÇ ÄÄÇ»ÅÍ´ÜÃþÃÔ¿µ ¿µ»óÀ» ±â¹ÝÀ¸·Î ±¸°³ Áß¾Ó¿¡ »ó¾ÇÀýÁ¦¼ú ÈÄ ¹ß»ýÇÑ °á¼ÕºÎ¸¦ °¡Áö´Â ¹«Ä¡¾Ç »ó¾Ç¸ðÇü°ú, ¹«Ä¡¾Ç 3Â÷¿ø À¯ÇÑ¿ä¼Ò ¸ðÇüÀ» Á¦ÀÛÇÏ¿´´Ù. °¢°¢ÀÇ ¸ðÇü¿¡ ÀûÇÕÇÑ ÃÑÀÇÄ¡¿Í Æó¼âÀåÄ¡¸¦ Á¦ÀÛÇÏ°í ÁÂÃø ¼Ò±¸Ä¡¿Í ±¸Ä¡ ºÎÀ§¿¡ 200 NÀÇ ¼öÁ÷ÇÏÁßÀ» °¡ÇÏ¿´´Ù. 3Â÷¿ø À¯ÇÑ¿ä¼Ò ºÐ¼®¹ýÀ» ÀÌ¿ëÇÏ¿© µÎ ¸ðÇü¿¡¼­ º¸Ã¶¹°°ú ÀÜÁ¸ »ó¾Ç°ñÁ¶Á÷ÀÇ von Mises ÀÀ·Â°ª°ú º¯À§·®À» ÃøÁ¤ÇÏ¿´´Ù.

°á°ú: µÎ ¸ðÇü ¸ðµÎ ÇÏÁßÀ» °¡ÇÑ ÂÊÀÇ ÇÇÁú°ñ¿¡¼­ ÃÖ´ë von Mises ÀÀ·Â °ªÀÌ °üÂûµÇ¾ú´Ù. ÃÑÀÇÄ¡ ¸ðÇüÀÇ ÇÇÁú°ñ¿¡¼­ °¡Àå ³ôÀº °ªÀº 2.73 MPa À̾úÀ¸¸ç Æó¼âÀåÄ¡ ¸ðÇüÀÇ ÇÇÁú°ñ¿¡¼­ °¡Àå ³ôÀº °ªÀº 2.69 MPa À̾ú´Ù. º¸Ã¶¹°ÀÇ Á¶Á÷¸é¿¡¼­µµ ³ôÀº ÀÀ·Â°ªÀÌ °üÂûµÇ¾ú´Ù. ÃÖ´ë º¯À§·®Àº Æó¼âÀåÄ¡¿¡¼­ ÃÑÀÇÄ¡º¸´Ù ´õ ³ôÀº °ªÀÌ °üÂûµÇ¾ú´Ù.

°á·Ð:Æó¼âÀåÄ¡´Â ÃÑÀÇÄ¡¿¡ ºñÇØ ±³ÇÕ·Â Àü´Þ ¸é¿¡¼­ ºÒ¸®Çß°í, ´õ Å« º¯À§·®ÀÌ °üÂûµÇ¾î »ó¾ÇÀýÁ¦¼úÀ» ¹ÞÀº ¹«Ä¡¾Ç ȯÀÚÀÇ º¸Ã¶Ä¡·á ½Ã ÇغÎÇÐÀû Áö½Ä¿¡ ¹ÙÅÁÀ» µÐ Á¤È®ÇÑ Àλóäµæ°ú º¸Ã¶Ä¡·á ¿øÄ¢ÀÇ Àû¿ëÀÌ °í·ÁµÇ¾î¾ß ÇÑ´Ù.

Purpose:The purposes of this study were to evaluate the stress distributions and the displacements of obturator for edentulous maxillectomy patients and to compare them with those of complete denture using three-dimensional finite element analysis.

Materials and Methods: Based on the CT image of edentulous patient, three-dimensional finite element model of edentulous maxillae was constructed. Three-dimensional finite element model of edentulous maxillae with palatal defect was also fabricated. On each model, complete denture and obturator prosthesis were created. Vertical static force of 200 N was applied on the left maxillary premolar and molar region. The von Mises stress values and the displacements of models were analyzed using three-dimensional finite element analysis.

Results: Maximum von Mises stress values were recorded in the cortical bones of both models. The von Mises stress value in the complete denture model was 2.73 MPa and 2.69 MPa in the obturator model. High von Mises stress values were also observed on the tissue surface of prosthesis. The maximum value of the displacement in the obturator was higher than that of complete denture.

Conclusion:

Å°¿öµå

»ó¾ÇÀýÁ¦¼ú; À¯ÇÑ¿ä¼ÒºÐ¼®; Æó¼âÀåÄ¡; ÃÑÀÇÄ¡
Maxillectomy; Finite element analysis; Obturator; Complete denture

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KCI
KoreaMed