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Multiloop Edgewise Arch WireÀÇ tip back Á¤µµ¿¡ µû¸¥ ÀÀ·Â ºÐÆ÷¿¡ °üÇÑ À¯ÇÑ¿ä¼Ò

Stress analysis of Multiloop Edgewise Arch Wire with various degree of tip back bend : a study using the finite element method

Korean Journal of Orthodontics 2000³â 30±Ç 2È£ p.127 ~ 142
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ÀÌ¿µÀÏ/Young Il Lee Â÷°æ¼®/ÀÌÁø¿ì/ÁÖÁø¿ø/Kyung Suk Cha/Jin Won Ju/Jin Woo Lee

Abstract

kabstract :
ÀÓ»ó¿¡¼­ ´Ù¾çÇÏ°Ô »ç¿ëµÇ´Â Multiloop Edgewise Arch Wire(MEAW)´Â ±¸Ä¡ºÎ Ä¡¾ÆÀÇ
Ä¡Ãà Á÷¸³À» À§ÇØ ¥±±Þ °í¹«ÁÙÀ̳ª ¼öÁ÷°í¹«ÁÙ°ú ÇÔ²² »ç¿ëµÈ´Ù. À̶§ tip back bendÀÇ Á¤
µµ´Â °¢ ȯÀÚÀÇ ±¸Ä¡Ä¡ÃàÀÇ ±Ù½É°æ»çÀÇ Á¤µµ¿¡ µû¶ó °¡°¨ÀÌ °áÁ¤µÇ³ª ÀÌ ÀåÄ¡°¡ ½ÇÁ¦ Ä¡±Ù
¸·¿¡¼­ ¾î¶² È¿°ú¸¦ ³ªÅ¸³»´ÂÁö Á¤È®È÷ ¾Ë·ÁÁø ¹Ù´Â ¾ø´Ù. ÀÌ¿¡ ÀúÀÚ´Â MEAWÀÇ ¿ªÈ¿°ú¸¦
¾Ë¾Æº¸±â À§ÇØ tip back bendÀÇ Á¤µµ¸¦ º¯È­½ÃŲ ÈÄ ¥±±Þ °í¹«ÁÙ, ¼öÁ÷°í¹«ÁÙÀ» Àû¿ë½ÃÄÑ
À¯ÇÑ¿ä¼Ò¹ýÀ» ÅëÇØ Ä¡±Ù¸·¿¡¼­ ¹ß»ýµÇ´Â ÀÀ·ÂÀÇ ºÐÆ÷¿Í Å©±â¸¦ Á¤·®ÀûÀ¸·Î ºñ±³, °üÂûÇÏ¿©
ÀåÄ¡ÀÇ ¿ª°è¸¦ ÀÌÇØÇÏ°í Ä¡·áÈ¿°ú¸¦ ¿¹ÃøÇØ º¸°íÀÚ ½ÇÇèÀ» °í¾ÈÇÏ¿´´Ù.
¹ßÄ¡³ª ±³Á¤Ä¡·áÀÇ °æÇèÀÌ ¾ø´Â 25¼¼ ³²ÀÚ Á¤»ó±³ÇÕÀÚ¸¦ ´ë»óÀ¸·Î ÄÄÇ»ÅÍ ´ÜÃþÃÔ¿µÀ» ½Ã
ÇàÇÏ¿© ¾òÀº ¹æ»ç¼±Çʸ²À» ±âÃÊ·Î ÇÏ¿© À¯ÇÑ¿ä¼Ò »ó¾ÇÄ¡¾Æ¸ðµ¨°ú, Ä¡±Ù¸·¸ðµ¨À» Á¦ÀÛÇÏ¿´À¸
¸ç ¿©±â¿¡ beam element·Î Á¦ÀÛµÈ MEAWÀÇ tip back bend¸¦ 5µµ, 10µµ, 15µµ·Î ´Þ¸®ÇÏ¿©
¥±±Þ °í¹«ÁÙ ¹× ¼öÁ÷°í¹«ÁÙÀ» Àû¿ë½ÃÄÑ °¢ Ä¡±Ù¸·¿¡¼­ÀÇ ¾ÐÃà, ÀÎÀå·ÂÀÇ ºÐÆ÷¿Í ÀÀ·ÂÀÇ Å©
±â¸¦ »óÈ£ ºñ±³ÇÑ °á°ú ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù.
1. MEAW¿¡ tip back bend¸¦ 5µµ, 10µµ, 15µµ·Î ºÎ¿©ÇÏ°í ¥±±Þ °í¹«ÁÙÀ̳ª ¼öÁ÷°í¹«ÁÙÀ»
Àû¿ë½ÃÄ×À» ¶§ Àüü Ä¡±Ù¸·¿¡ ³ªÅ¸³ª´Â ¾ÐÃà, ÀÎÀåÀÇ ºÐÆ÷´Â ¥±±Þ °í¹«ÁÙ °¢°¢ÀÇ °æ¿ì¿¡¼­
tip back bendÀÇ Á¤µµ¿¡ »ó°ü¾øÀÌ À¯»çÇÑ ¾ç»óÀ» ³ªÅ¸³Â´Ù.
2. °¢ Ä¡¾ÆÀÇ Ä¡±Ù¸·¿¡ ³ªÅ¸³­ ¾ÐÃà, ÀÎÀå·ÂÀÇ Å©±â´Â 5µµ, 10µµÀÇ °æ¿ìº¸´Ù 15µµ tip back
bend ºÎ¿©½Ã ´õ Å©°Ô ³ªÅ¸³µ´Ù.
3. Á¦1, 2´ë±¸Ä¡ÀÇ ¿ø½ÉÃø Ä¡±Ù¸·¿¡¼­´Â ¾ÐÃà·ÂÀÌ Å©°Ô ³ªÅ¸³µÀ¸¸ç ƯÈ÷ Á¦2´ë±¸Ä¡ Ä¡±Ù¸·ÀÇ
¾ÐÃàºÎÀ§°¡ Á¦1´ë±¸Ä¡ Ä¡±Ù¸· ¾ÐÃàºÎÀ§º¸´Ù ´õ ³Ð°í ¾ÐÃà·ÂÀÇ Å©±âµµ ´õ Å©°Ô ³ªÅ¸³µ´Ù. ¶Ç
ÇÑ tip back bend Á¤µµ°¡ Ŭ¼ö·Ï ¾ÐÃà·Âµµ Å©°í ¾ÐÃàºÎÀ§µµ ´õ ³Ð°Ô ³ªÅ¸³µ´Ù.
4. ´ë±¸Ä¡ Ä¡±Ù¸·ÀÇ ¾ÐÃà·ÂÀº ¼Ò±¸Ä¡ Ä¡±Ù¸·ÀÇ ¾ÐÃà·Âº¸´Ù »ó´ëÀûÀ¸·Î ´õ ÀÛ°Ô ³ªÅ¸³µ´Ù.
5. ¥±±Þ°í¹«ÁÙ°ú ¼öÁ÷°í¹«ÁÙ Àû¿ë ½Ã¸¦ ºñ±³Çغ¼ ¶§ º¸¸é ¼öÁ÷°í¹«ÁÙ ÀåÂø½Ã ÀüÄ¡ºÎ Ä¡±Ù¸·
¿¡ ÀÎÀå·ÂÀÌ ´õ ³Ð°Ô, ±× Å©±â´Â ´õ ÀÛ°Ô ³ªÅ¸³µ´Ù. ¹Ý¸é¿¡ ±¸Ä¡ºÎ Ä¡±Ù¸·¿¡ ³ªÅ¸³ª´Â ÀÀ·Â
ÀÇ ºÐÆ÷¿Í Å©±â´Â º° Â÷À̸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù.
6ÀüÄ¡ºÎ Ä¡±Ù¸· ÀÎÀåºÎÀ§¿¡¼­ ÀÎÀå·ÂÀº °ßÄ¡¿¡¼­ Á¦ÀÏ ÄÇ´Ù.
#ÃÊ·Ï#
-Abstract-
This study have been carried out to find out the mechnical effect of Multiloop
Edgewise Arch Wire(MEAW) making use of the finite element method. The tip back
bend of MEAW taken in this analysis is 5¢ª,12¢ªand 15¢ª. In addition, Class ¥± or up &
down elastic is applied to find out stress distribution and their values in PDL. A adult
male of normal was selected to create the models of teeth and PDL. And the model of
MEAW was also created using commercial finite element code (ANSYS version 5.2).
The MEAW is forcibly engaged with a class ¥± or up & down elastic, to determine the
initial stress generated in PDL.
Comparing the compressive and tensile stress at each reference-planes, following
results are obtained.
1. When a MEAW of 5¢ª,10¢ª,15¢ª tip back bend was engaged with Class ¥± or up &
down elastic, the distribution of compressive, tensile stress in entire PDL is similar in
each case.
2. The values of compressive and tensile stress in PDL is higher in 15¢ªtip back bend
case than in 10¢ªor 5¢ªtip back bend case.
3. In the distal PDL of 1st and 2nd molar, compressive stress appears. The compressive
area is more wide and its values is higher in PDL 2nd molar than those in 1st molar.
The compressive area and its values become more wide and higher according to the
increase of the tip back bend.
4. The value of compressive stress are comparatively smaller in PDL of molars than
those in premolars.
5. Comparing class ¥± and up & down elastic case, tensile stress values in anterior
teeth PDL are smaller and their distribution is more wide in up & down elastic case
than class ¥± elastic case. On another hand, there is no difference in distribution and
stress values in PDL of posterior teeth between two cases.
6 Comparing the tensile area in PDL of anterior teeth, tensile stress values are
maximum in PDL of canine.

Å°¿öµå

MEAW; Tip back bend; Ä¡±Ù¸·; À¯ÇÑ¿ä¼Ò¹ý; MEAW; Tip back bend; PDL; FEM;

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