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Biomechanical considerations for the screw of implant prosthesis: A literature review

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ÀӼҹΠ( Im So-Min ) - °­¸ª¿øÁÖ´ëÇб³ Ä¡°ú´ëÇÐ ±¸°­°úÇבּ¸¼Ò
±è´ë°ï ( Kim Dae-Gon ) - °­¸ª¿øÁÖ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
¹ÚÂùÁø ( Park Chan-Jin ) - °­¸ª¿øÁÖ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
Á¶¸®¶ó ( Cho Lee-Ra ) - °­¸ª´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç ¹× ±¸°­°úÇבּ¸¼Ò
Â÷¹Î»ó ( Cha Min-Sang ) - °­¸ª¾Æ»êº´¿ø º¸Ã¶°ú

Abstract

¿¬±¸¸ñÀû : ÀÓÇöõÆ® º¸Ã¶¹°ÀÇ À¯Áö ³ª»ç¿¡ Àû¿ëµÇ´Â ÀüÇÏÁßÀº ³ª»ç¸¦ Á¶ÀÓÀ¸·Î½á ÀÓÇöõÆ®¿Í Áö´ëÁÖ »çÀÌ¿¡ ÀÎÀå·ÂÀÌ ¹ß»ýÇϸ鼭 ³ª»ç°¡ ½ÅÀåµÇ´Â ÈûÀ» ¸»ÇÑ´Ù. ÀÌ ¿¬±¸´Â ÀüÇÏÁß¿¡ ¿µÇâÀ» ¹ÌÄ¡´Â »ý¿ªÇÐÀû ¿äÀεé°ú ³ª»ç Ç®¸²¿¡ ±â¿©ÇÏ´Â ´Ù¾çÇÑ ¿äÀο¡ ´ëÇÏ¿© ¹®ÇåÀ» °íÂûÇÏ°íÀÚ ÇÏ¿´´Ù.

¿¬±¸ Àç·á ¹× ¹æ¹ý: 1981³âºÎÅÍ 2009³â±îÁö ¹ßÇ¥µÈ ³ª»ç Ç®¸²À» ´Ù·é Àӻ󿬱¸ Áß ¼³Á¤ÇÑ ±âÁØ¿¡ ÇÕ´çÇÑ ¹®ÇåÀ» ¿ä¾àÇÏ¿© ³ª»ç Ç®¸²ÀÇ ºóµµ¸¦ ¹àÇû°í ³ª»çÀÇ ¾ÈÁ¤¼º°ú ÀüÇÏÁß¿¡ °üÇÑ »ý¿ªÇÐÀ» ´Ù·é ¹®ÇåÀ» Á¶»çÇÏ°í ¿ä¾àÇÏ¿´´Ù. ¶ÇÇÑ, º» ±³½Ç¿¡¼­ ¿¬±¸ÇÑ ½ÇÇè½ÇÀû °á°úµµ Æ÷ÇÔ½ÃÄ×´Ù.

°á°ú ¹× °á·Ð: ³ª»ç Ç®¸²ÀÇ Á¤µµ´Â ³ª»ç¿¡ ÅäÅ©¸¦ °¡ÇÏ´Â ±â¼úÀÌ ¹ß´ÞÇÔ¿¡ µû¶ó ÇöÀúÈ÷ °¨¼ÒÇÏ°í ÀÖ´Ù. ±× ¿Ü¿¡µµ ³ª»çÀÇ ÀçÁú, ¸¶Âû°è¼ö¸¦ °¨¼Ò½ÃÅ°±â À§ÇÑ ÇǺ¹ ±â¼úÀÇ ¹ß´Þ ¹× ³ª»ç»êÀÇ ¸ð¾ç µî ÀüÇÏÁß¿¡ ¿µÇâÀ» ÁÙ ¼ö ÀÖ´Â ¿äÀÎÀ» °íÂûÇÏ¿´´Ù. ÀüÇÏÁßÀÌ ÀÏÁ¤ ¼öÁØ ÀÌÇÏ·Î ¶³¾îÁö°Ô µÇ¸é ³ª»çÀÇ ¿òÁ÷ÀÓÀÌ ¹ß»ýÇÏ°Ô µÇ´Âµ¥ ÀÌ´Â Àå±âÀûÀ¸·Î ÃàÀûµÇ¾î ÇÇ·ÎÆÄÀý ¹× ÀÀÂø ¸¶¸ð, ¼Ò¼º º¯Çü µîÀ» À¯¹ßÇÏ°Ô µÇ¹Ç·Î ÁÖÀÇÇØ¾ß ÇÑ´Ù. ÃÖÀûÀÇ ÀüÇÏÁßÀ» ÁÖ±â À§Çؼ­´Â ÅäÅ© ·»Ä¡¸¦ ÀÌ¿ëÇÏ°í ȯÀÚÀÇ Àç³»¿ø½Ã ´Ù½Ã ÅäÅ©¸¦ °¡ÇÏ´Â ¹æ¹ý µîÀÌ ÃßõµÈ´Ù.

Purpose: This article attempted to determine the factors affecting the preload and screw loosening.

Methods: Available clinical studies from 1981 to 2008 from the PUBMED that presented screw loosening data and review articles regarding screw joint stability were evaluated. Eleven studies dealing the biomechanical principles of the screw mechanics were reviewed. Moreover, the results of our data were included.

Results: The frequency of screw loosening was consequently reduced due to the advancement in torque tightening with torque wrench, screw material, coating technique for reducing the frictional force, and thread design, etc. If preload in the screw falls below a critical level, joint stability may be compromised, and the screw joint may fail clinically. The types of fatigue failure of screw were divided to adhesive wear, plastic deformation, and screw fracture.

Conclusion: An optimum preload is essential to the success of the implant-abutment complex. To maintain optimum preload, using a torque wrench and re-tightening at recall time were needed.

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Preload;Screw;Screw loosening;Torque

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