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Finite-element investigation of the center of resistance of the maxillary dentition

Korean Journal of Orthodontics 2009³â 39±Ç 2È£ p.83 ~ 94
Á¤±¤¸ð, À̱âÁØ, ÀüÀ±½Ä, ¸ð¼º¼­, ¼º»óÁø,
¼Ò¼Ó »ó¼¼Á¤º¸
Á¤±¤¸ð ( Jeong Gwang-Mo ) - °¡Å縯´ëÇб³ ÀÓ»óÄ¡°úÇдëÇпø ±³Á¤Çаú
À̱âÁØ ( Lee Kee-Joon ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ ±³Á¤Çб³½Ç
ÀüÀ±½Ä ( Chun Youn-Sic ) - ÀÌÈ­¿©ÀÚ´ëÇб³ ¸ñµ¿º´¿ø Ä¡°ú±³Á¤°ú
¸ð¼º¼­ ( Mo Sung-Seo ) - °¡Å縯´ëÇб³ ¼º¸ðº´¿ø Ä¡°ú±³Á¤°ú
¼º»óÁø ( Sung Sang-Jin ) - ¿ï»ê´ëÇб³ ¼­¿ï¾Æ»êº´¿ø Ä¡°ú±³Á¤°ú

Abstract

ÃÖ±Ù °ñ³» °íÁ¤ ÇüÅÂÀÇ temporary anchorage device (TAD)¸¦ ¸¹ÀÌ ÀÌ¿ëÇÏ°Ô µÇ¸é¼­ ´Ù¾çÇÑ À§Ä¡·ÎºÎÅÍ ±×¸®°í °­ÇÑ ±³Á¤·ÂÀ» ÀÌ¿ëÇÒ ¼ö ÀÖ°Ô µÇ¾ú´Ù. ÀÌ¿¡ µû¶ó Ä¡¾Æ±ºÀÇ À̵¿¾ç»óÀ» ¿¹ÃøÇÏ°í Ä¡·á°èȹÀ» ¼¼¿ì±â À§ÇÏ¿© ´Ù¾çÇÑ Ä¡¾Æ±ºÀÇ ÀúÇ×Áß½ÉÀÇ À§Ä¡¿¡ ´ëÇÑ ÀÌÇØ°¡ ÇÊ¿äÇÏ°Ô µÇ¾ú´Ù. º» ¿¬±¸¿¡¼­´Â 3Â÷¿ø À¯ÇÑ¿ä¼ÒÇؼ®À» ÀÌ¿ëÇÏ¿© »ó¾Ç 4ÀüÄ¡, 6ÀüÄ¡ ±×¸®°í »ó¾Ç ÀüÄ¡¿­¿¡¼­ 3Â÷¿øÀû ÀúÇ×Áß½ÉÀÇ À§Ä¡¸¦ Á¶»çÇÏ°íÀÚ ÇÏ¿´´Ù. À̸¦ À§ÇÏ¿© »ó¾Ç ÀüÄ¡¿­ 14°³ Ä¡¾Æ¿Í Ä¡±Ù¸· ¹× Ä¡Á¶°ñÀÇ 3Â÷¿ø À¯ÇÑ¿ä¼Ò¸ðµ¨À» Á¦ÀÛÇÏ¿´°í, °¢ Ä¡¾Æ±ºº°·Î Ä¡°üºÎ¸¦ ÇùÃø, ¼³Ãø È£¼±, ¼³Ãø splint wire·Î °íÁ¤ÇÏ¿© °³º° Ä¡¾ÆÀ̵¿À» ÃÖ¼ÒÈ­ÇÏ°í Àû¿ëµÈ ÈûÀÌ Ä¡¾Æ¿¡ °í·ç ºÐ»êµÇµµ·Ï ÇÏ¿´´Ù. »ó¾Ç ÁßÀýÄ¡ Àý´Ü¿¬ÀÇ ÁßÁ¡¿¡¼­ ¿¬ÀåµÈ ¿ÍÀÌ¾î ºö¿¡ ¼öÁ÷, ¼öÆòÀ¸·Î 100 g ¶Ç´Â 200 gÀÇ ÈûÀ» °¡ÇÏ¿© Ä¡¾ÆÀÇ º¯À§¸¦ Çؼ®ÇÏ°í, °¢ Ä¡¾Æ±º¿¡ ¼ÓÇÑ Ä¡¾ÆµéÀÌ ÃÖ´ëÇÑ ÆòÇàÀ̵¿ µÇ´Â ÈûÀÇ Àû¿ëºÎÀ§¸¦ ÀúÇ×Áß½ÉÀ¸·Î Á¤ÀÇÇÏ¿´´Ù. ¿¬±¸°á°ú »ó¾Ç 4ÀüÄ¡±ºÀÇ ÀúÇ×Áß½ÉÀº »ó¾Ç ÁßÀýÄ¡ Àý´Ü¿¬À¸·ÎºÎÅÍ Ä¡±Ù¹æÇâ 13.5 mm, ÈĹæ 12.0 mm, »ó¾Ç 6ÀüÄ¡±ºÀº »ó¾Ç ÁßÀýÄ¡ Àý´Ü¿¬À¸·ÎºÎÅÍ Ä¡±Ù¹æÇâ 13.5 mm, ÈĹæ 14.0 mm¿¡ À§Ä¡ÇÏ¿´À¸¸ç »ó¾Ç ÀüÄ¡¿­±ºÀÇ ÀúÇ×Áß½ÉÀº »ó¾Ç ÁßÀýÄ¡ Àý´Ü¿¬À¸·ÎºÎÅÍ Ä¡±Ù¹æÇâ 11.0 mm, ÈĹæ 26.5 mm¿¡ À§Ä¡ÇÏ¿´´Ù. º» À¯ÇÑ¿ä¼Ò ½ÇÇè¸ðµ¨À» ÀÌ¿ëÇÏ¿© ¾òÀº °á°ú´Â ±³Á¤Ä¡·áÀÇ È¿À²¼ºÀ» ³ôÀÏ ¼ö ÀÖÀ¸¸®¶ó »ý°¢µÈ´Ù.

Objective: The aim of this study was to investigate the 3-dimensional position of the center of resistance of the 4 maxillary anterior teeth, 6 maxillary anterior teeth, and the full maxillary dentition using 3-dimensional finite element analysis.

Methods: Finite element models included the whole upper dentition, periodontal ligament, and alveolar bone. The crowns of the teeth in each group were fixed with buccal and lingual arch wires and lingual splint wires to minimize individual tooth movement and to evenly disperse the forces to the teeth. A force of 100 g or 200 g was applied to the wire beam extended from the incisal edge of the upper central incisor, and displacement of teeth was evaluated. The center of resistance was defined as the point where the applied force induced parallel movement.

Results: The results of study showed that the center of resistance of the 4 maxillary anterior teeth group, the 6 maxillary anterior teeth group, and the full maxillary dentition group were at 13.5 mm apical and 12.0 mm posterior, 13.5 mm apical and 14.0 mm posterior, and 11.0 mm apical and 26.5 mm posterior to the incisal edge of the upper central incisor, respectively.

Conclusions: It is thought that the results from this finite element models will improve the efficiency of orthodontic treatment.

Å°¿öµå

À¯ÇÑ¿ä¼ÒÇؼ®;ÀúÇ×Áß½É;»ó¾Ç 4ÀüÄ¡±º;»ó¾Ç 6ÀüÄ¡±º;»ó¾Ç ÀüÄ¡¿­±º
Finite element analysis;Center of resistance;Maxillary 4 anterior teeth group;Maxillary 6 anterior teeth group;Full maxillary dentition group

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