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Effects of Coronal Thread Pitch in Scalloped Implant with 2 Different Connections on Loading Stress using 3 Dimensional Finite Element Analysis

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ÃÖ°æ¼ö, ¹Ú¼ºÈÆ, ÀÌÀçÈÆ, ÇãÁߺ¸, À±¹ÌÁ¤, Àü¿µÂù, Á¤Ã¢¸ð,
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ÃÖ°æ¼ö ( Choi Kyung-Soo ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø º¸Ã¶Çб³½Ç
¹Ú¼ºÈÆ ( Park Seong-Hun ) - ºÎ»ê´ëÇб³ ±â°è°øÇаú
ÀÌÀçÈÆ ( Lee Jae-Hoon ) - ºÎ»ê´ëÇб³ ±â°è°øÇаú
ÇãÁߺ¸ ( Huh Jung-Bo ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø º¸Ã¶Çб³½Ç
À±¹ÌÁ¤ ( Yun Mi-Jung ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø º¸Ã¶Çб³½Ç
Àü¿µÂù ( Jeon Yeong-Chan ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø º¸Ã¶Çб³½Ç
Á¤Ã¢¸ð ( Jeong Chang-Mo ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø º¸Ã¶Çб³½Ç

Abstract

º» ¿¬±¸´Â »ïÂ÷¿øÀû À¯ÇÑ¿ä¼ÒºÐ¼®À» ÅëÇÏ¿© ¿¬°áºÎ ÇüÅ°¡ ´Ù¸¥ µÎ °¡Áö scallop ÀÓÇöõÆ®ÀÇ °æºÎ ³ª»ç¼± ÇÇÄ¡°¡ ÀÀ·Â ºÐÆ÷¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» °£Á¢ÀûÀ¸·Î È®ÀÎÇÏ°íÀÚ ÇÏ¿´´Ù. 4°¡Áö °æºÎ ³ª»ç¼± ÇÇÄ¡ (0.4mm, 0.5mm, 0.6mm, 0.7mm)¸¦ °®´Â scallop ÀÓÇöõÆ®¸¦ µÎ °¡Áö ´Ù¸¥ ¿¬°áºÎ ÇüÅ (platform matching connection, platform mismatching connection)·Î Áö´ëÁÖ¿Í ¿¬°áµÇ´Â À¯ÇÑ¿ä¼Ò¸ðÇüÀ» ¼³°èÇÏ¿´´Ù. 8°³ÀÇ ¸ðµç ¸ðµ¨¿¡ 100NÀÇ ÇÏÁßÀ» ¼öÁ÷ ¹× 30µµ °æ»ç ¹æÇâÀ¸·Î Àΰ¡ÇÏ¿©, ÀÓÇöõÆ®, Áö´ëÁÖ, ±×¸®°í Ä¡Á¶°ñ¿¡ °¡ÇØÁö´Â ÃÖ´ëµî°¡ÀÀ·ÂÀ» ºÐ¼®ÇÏ¿´´Ù. À¯ÇÑ¿ä¼ÒºÐ¼®°á°ú ÀÀ·ÂÀº Ä¡¹Ð°ñ¿¡ ÁýÁߵǾú´Ù. ÀÛÀº ³ª»ç ÇÇÄ¡°¡ ¼³°èµÈ platform mismatching connection ¸ðµ¨¿¡¼­ ¼öÁ÷ ¹æÇâ°ú °æ»çÇÏÁß ½Ã ÃÖ´ëµî°¡ÀÀ·ÂÀÌ °¡Àå ³·°Ô ³ªÅ¸³µ´Ù. ÃøÁ¤µÇ¾ú´Ù. Platform matching connection ¸ðµ¨¿¡¼­´Â °æ»çÇÏÁßÀÇ °æ¿ì 0.6mm, ¼öÁ÷ÇÏÁßÀÇ °æ¿ì 0.4mm ³ª»ç ÇÇÄ¡¿¡¼­ °¡Àå ³·Àº ÃÖ´ëµî°¡ÀÀ·ÂÀ» º¸¿´´Ù. µû¶ó¼­ scallop ÀÓÇöõÆ®¿¡¼­ platform mismatching connectionÀº ÃÖ´ëµî°¡ÀÀ·ÂÀ» °¨¼Ò½ÃÅ°´Â µ¥ Áß¿äÇÑ ¿ªÇÒÀ» Çϸç, °æºÎ ³ª»ç ÇÇÄ¡°¡ ÀÛÀ»¼ö·Ï ÃÖ´ëµî°¡ÀÀ·ÂÀÌ °¨¼ÒµÇ´Â °æÇâÀ» º¸ÀÓÀ» ¾Ë ¼ö ÀÖ¾ú´Ù.

Purpose of present study is to investigate the effects of thread pitch in coronal portion in scalloped implant with 2 different connections on loading stress using 3 dimensional finite element analysis. Scalloped implant with 4 different thread pitches (0.4mm, 0.5mm, 0.6, and 0.7mm) in the coronal part was modeled with 2 different implant-abutment connections. Platform matching connection had the same implant and abutment diameter so that they were in flush contact at the periphery while platform mismatching connection had smaller abutment diameter than implant so that their connection was made away from periphery of implant-bone interface. Occlusal loading of 100N force was applied vertically and 30 degree obliquely to all 8 models and the maximum von Mises bone stress was identified. Loading stress as highly concentrated in cortical bone. Platform mismatching scalloped implant with small thread pitch (0.4mm) model had consistently lowest maximum von Mises bone stress in vertical and oblique loads. Platform matching model had lowest maximum von Mises bone stress with 0.6mm thread pitch in vertical load and with 0.4mm thread pitch in oblique load. Platform mismatching connection had important roles in reducing maximum von Mises bone stress. Scalloped implant with smaller coronal thread pitch showed trend of reducing maximum von Mises bone stress under load.

Å°¿öµå

°æºÎ ³ª»ç¼± ÇÇÄ¡; ¿¬°áºÎ ÇüÅÂ; scallop ÀÓÇöõÆ®; »ïÂ÷¿øÀûÀ¯ÇÑ¿ä¼ÒºÐ¼®
Coronal thread pitch; Connection; Scalloped implant; 3D finite element analysis

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