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Effect of attachments and palatal coverage of maxillary implant overdenture on stress distribution: a finite element analysi

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¹ÚÁ¾Èñ ( Park Jong-Hee ) - Chonbuk National University School of Dentistry Department of Prosthodontics
¿Õ¿ø°ï ( Wang Yuan-Kun ) - Chonbuk National University School of Dentistry Department of Prosthodontics
ÀÌÁ¤Áø ( Lee Jeong-Jin ) - Chonbuk National University School of Dentistry Department of Prosthodontics
¹Ú¿¬Èñ ( Park Yeon-Hee ) - Chonbuk National University School of Dentistry Department of Prosthodontics
¼­Àç¹Î ( Seo Jae-Min ) - Chonbuk National University School of Dentistry Department of Prosthodontics
±è°æ¾Æ ( Kim Kyoung-A ) - Eulji University School of Medicine Department of Dentistry

Abstract

¸ñÀû: »ó¾Ç ÀÓÇöõÆ® ÇÇ°³ÀÇÄ¡¿¡¼­ À¯ÁöÀåÄ¡ Á¾·ù¿Í ±¸°³ ÇÇ°³ À¯¹«¿¡ µû¸¥ ÀÀ·ÂºÐÆ÷¸¦ 3Â÷¿ø À¯ÇÑ¿ä¼ÒºÐ¼®¹ýÀ» ÅëÇØ ¾Ë¾Æº¸°íÀÚ ÇÑ´Ù.

¿¬±¸ Àç·á ¹× ¹æ¹ý: CAD¸¦ ÀÌ¿ëÇÏ¿© Àü¹æºÎ¿¡ 4°³ÀÇ ÀÓÇöõÆ®¸¦ ½Ä¸³ÇÑ 4Á¾·ùÀÇ »ó¾Ç ÀÓÇöõÆ® ÇÇ°³ÀÇÄ¡¿¡ ´ëÇÑ 3Â÷¿ø ¸ðµ¨À» µðÀÚÀÎÇÏ¿´´Ù. 1) Ball-F: º¼ À¯ÁöÀåÄ¡¸¦ »ç¿ëÇÏ°í ±¸°³¸¦ ÇÇ°³ÇÑ ±º, 2) Ball-P: º¼ À¯ÁöÀåÄ¡¸¦ »ç¿ëÇÏ°í ±¸°³¸¦ ÇÇ°³ÇÏÁö ¾ÊÀº ±º, 3) Bar-F: ¹Ù À¯ÁöÀåÄ¡¸¦ »ç¿ëÇÏ°í ±¸°³¸¦ ÇÇ°³ÇÑ ±º, 4) Bar-P: ¹Ù À¯ÁöÀåÄ¡¸¦ »ç¿ëÇÏ°í ±¸°³¸¦ ÇÇ°³ÇÏÁö ¾ÊÀº ±º. ÀÀ·ÂºÐ¼®Àº À¯ÇÑ¿ä¼Ò ºÐ¼® ÇÁ·Î±×·¥ÀÎ ANSYS Workbench Ver. 14¸¦ »ç¿ëÇÏ¿´À¸¸ç, ÆíÃø ÀúÀÛÀÇ »óȲÀ» °í·ÁÇÏ¿© ¿ìÃø Á¦1´ë±¸Ä¡¿¡ 100 NÀÇ Á¤ÀûÇÏÁßÀ» Àû¿ëÇÏ¿© ÀÓÇöõÆ®, ÀÓÇöõÆ® ÁÖÀ§ °ñ, Á¡¸·¿¡ ¹ß»ýÇÏ´Â ÃÖ´ë ÀÀ·Â°ªÀ» ±â·ÏÇÏ¿´´Ù.

°á°ú: º¼ À¯ÁöÀåÄ¡¸¦ »ç¿ëÇÑ ±ºÀÌ ¹Ù À¯ÁöÀåÄ¡¸¦ »ç¿ëÇÑ ±ºº¸´Ù ÀÓÇöõÆ® ¹× ÀÓÇöõÆ® ÁÖÀ§°ñ¿¡ ¹ß»ýÇÏ´Â ÃÖ´ë ÀÀ·Â°ªÀÌ ÀÛ¾Ò´Ù. ÇÏÁö¸¸ Á¡¸·¿¡¼­ÀÇ ÃÖ´ë ÀÀ·Â°ªÀº ±× ¹Ý´ë·Î ³ªÅ¸³µ´Ù. ±¸°³¸¦ ÇÇ°³Çϸé À¯ÁöÀåÄ¡ÀÇ Á¾·ù¿Í ¹«°üÇÏ°Ô ÀÓÇöõÆ®, ÀÓÇöõÆ® ÁÖÀ§ °ñ, Á¡¸· ¸ðµÎ¿¡¼­ ÃÖ´ëÀÀ·Â°ªÀÌ ÀÛ¾ÆÁ³´Ù.

°á·Ð: º» ¿¬±¸ÀÇ ÇÑ°è ³»¿¡¼­ »ó¾Çµ¿ Àü¹æºÎ¿¡ 4°³ÀÇ ÀÓÇöõÆ®¸¦ ½Ä¸³ÇÏ¿© ¼öº¹µÈ ÇÇ°³ÀÇÄ¡¿¡¼­ ¹Ù À¯ÁöÀåÄ¡º¸´Ù´Â º¼ À¯ÁöÀåÄ¡¸¦ »ç¿ëÇÏ°í ±¸°³¸¦ ¿ÏÀüÈ÷ ÇÇ°³ÇÏ´Â °æ¿ì°¡ ÀÓÇöõÆ®¿Í ÀÓÇöõÆ® ÁÖÀ§ °ñÀÇ ÀÀ·ÂºÐ»ê¿¡ È¿°úÀûÀÌ´Ù.

Purpose: The purpose of this study was to evaluate the effect of attachments and palatal coverage on stress distribution in maxillary implant overdenture using finite element analysis.

Materials and Methods: Four maxillary overdenture 3-D models with four implants placed in the anterior region were fabricated with computer-aided design. 1) Ball-F: Non-splinted ball attachment and full palatal coverage, 2) Ball-P: Non-splinted ball attachment and U-shaped partial palatal coverage, 3) Bar-F: Splinted milled bar attachment and full palatal coverage, 4) Bar-P: Splinted milled bar attachment and U-shaped partial palatal coverage. Stress distribution analysis was performed with ANSYS workbench 14. 100 N vertical load was applied at the right first molar unilaterally and maximum stress was calculated at the implant, peri-implant bone and mucosa.

Results: The use of the ball attachment showed lower maximum stress on implant and peri-implant bone than the use of the milled bar attachment. But it showed contrary tendency in the mucosa. Regardless of attachment, full palatal coverage showed lower maximum stress on implant, peri-implant bone and mucosa.

Conclusion: Within the limitation of this study, ball attachment improved stress distribution on implant and periimplant bone rather than milled bar attachment in maxillary implant overdenture. Also, full palatal coverage is more favorable in stress distribution.

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ÀÓÇöõÆ® ÇÇ°³ÀÇÄ¡; À¯ÁöÀåÄ¡; 3Â÷¿ø À¯ÇÑ¿ä¼ÒºÐ¼®
implant overdenture; attachment; finite element analysis

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