´ÏÄÌ-ƼŸ´½ ¿ÍÀ̾îÀÇ ¿Ã³¸®¿¡ µû¸¥ ºÎÇÏ-º¯À§ Ư¼º º¯È
Effects of heat treatment on the load-deflection properties of nickel-titanium wire
Àå¼öÈ£, ±è±¤¿ø, ÀÓ¼ºÈÆ,
¼Ò¼Ó »ó¼¼Á¤º¸
Àå¼öÈ£ ( Chang Soo-Ho ) - Á¶¼±´ëÇб³ Ä¡°ú´ëÇÐ ±³Á¤Çб³½Ç
±è±¤¿ø ( Kim Kwang-Won ) - Á¶¼±´ëÇб³ Ä¡°ú´ëÇÐ ±³Á¤Çб³½Ç
ÀÓ¼ºÈÆ ( Lim Sung-Hoon ) - Á¶¼±´ëÇб³ Ä¡°ú´ëÇÐ ±³Á¤Çб³½Ç
KMID : 0361920060360050349
Abstract
´ÏÄÌ-ƼŸ´½ ÇÕ±ÝÀº ³ôÀº spring-back¼ºÁú, ÃÊź¼º È¿°ú, Çü»ó±â¾ï È¿°ú µîÀÇ ÀåÁ¡À» °¡Áö°í ÀÖÀ¸³ª ¼ºÇüÀÌ ¾î·Æ´Ù´Â ´ÜÁ¡À» °¡Áö°í ÀÖ´Ù. º» ¿¬±¸¿¡¼´Â ´ÏÄÌ-ƼŸ´½ ¿ÍÀ̾îÀÇ ±¼°îÀ» À§ÇÑ ¿Ã³¸® ½Ã¿¡ ³ªÅ¸³ª´Â ºÎÇÏ-º¯À§ °î¼±ÀÇ º¯È ¹× »óÀüÀÌ ¿Âµµ º¯È¿Í °°Àº ¹°¼º º¯È ¾ç»óÀ» Á¶»çÇÏ°íÀÚ ÇÏ¿´´Ù. ¼öÁ¾ÀÇ ´ÏÄÌ-ƼŸ´½ ¿ÍÀ̾ ¿Ã³¸®¸¦ ½ÃÇàÇÏÁö ¾ÊÀº ±º, Àü±âÀúÇ× ¿Ã³¸® ÀåÄ¡¸¦ ÀÌ¿ëÇÏ¿© ¿ÍÀÌ¾î ´Ü¸éÀû¿¡ µû¶ó Á¦Á¶È¸»ç¿¡¼ ±ÇÀåÇÏ´Â Àü·ù¸¦ ±âÃÊ·Î ÇÏ¿© $00.016"\;{\times}\;00.022"$ (5 A, 7 sec), $0.018"\;{\times}\;0.025"$ (6 A, 7 sec) ±×¸®°í $0.0215"\;{\times}\;0.028"$ (7 A, 8 sec) ¿ÍÀ̾ ¿Ã³¸®¸¸ ½ÃÇàÇÑ ½ÇÇ豺, ¿Ã³¸®¸¦ ½ÃÇàÇÏ¿© ±¼°îÀ» ºÎ¿©ÇÑ ½ÇÇ豺 ±×¸®°í ¿Ã³¸® ½Ã°£À» 1ÃÊ Áõ°¡½ÃÄÑ ±¼°îÀ» ºÎ¿©ÇÑ ½ÇÇ豺À¸·Î ºÐ·ùÇÏ¿© 3Á¡ ±¼°î ½ÇÇè°ú ½ÃÂ÷Áֻ翷®ÃøÁ¤À» ÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù. $0.016"\;{\times}\;0.022"$, $0.018"\;{\times}\;0.025"$ ±×¸®°í $0.0215"\;{\times}\;0.028"$ ´ÏÄÌ-ƼŸ´½ ¿ÍÀ̾¼ ±¼°îÀ» ºÎ¿©ÇÏÁö ¾Ê°í ¿Ã³¸®¸¸ ½ÃÇàÇÑ ½ÇÇ豺ÀÌ ¿Ã³¸®¸¦ ½ÃÇàÇÏÁö ¾ÊÀº ´ëÁ¶±º¿¡ ºñÇØ ºÎÇÏ-º¯À§ °î¼±ÀÌ »ó¹æ À̵¿µÇ¾î ÃÊź¼º Çö»ó¿¡ ÀÇÇÑ Æòź¿ª(loading and unloading plateau)ÀÇ ÈûÀÌ ´õ Áõ°¡µÇ¾ú´Ù. $0.016"\;{\times}\;0.022"$, $0.018"\;{\times}\;0.025"$ ±×¸®°í $0.0215"\;{\times}\;0.028"$ ¿ÍÀ̾¼ ¿Ã³¸®¸¸ ½ÃÇàÇÑ ½ÇÇ豺ÀÌ ¿Ã³¸®¸¦ ½ÃÇàÇÏÁö ¾ÊÀº ±ºº¸´Ù ´õ ³·Àº austenite finish ($A_f$) ¿Âµµ¸¦ º¸¿´´Ù. $0.018"\;{\times}\;0.025"$ ¹× $0.0215"0.028"$ ¿ÍÀ̾¼ ¿Ã³¸®¸¦ ½ÃÇàÇÏ¿© ±¼°îÀ» ºÎ¿©ÇÑ ½ÇÇ豺Àº ¿Ã³¸®¸¸ ½ÃÇàÇÑ ½ÇÇ豺°ú ¿Ã³¸®¸¦ ½ÃÇàÇÏÁö ¾ÊÀº ´ëÁ¶±º¿¡ ºñÇØ ºÎÇÏ-º¯À§ °î¼±ÀÌ »ó¹æ À̵¿µÇ¾úÀ¸¸ç, ¿Ã³¸® ½Ã°£À» 1ÃÊ Áõ°¡½ÃÄÑ ±¼°îÀ» ºÎ¿©ÇÑ ½ÇÇ豺¿¡¼ °¡Àå ³ôÀº ºÎÇÏ-º¯À§ °î¼±À» ³ªÅ¸³Â´Ù. $0.018"\;{\times}\;0.025"$ ±×¸®°í $0.0215"\;{\times}\;0.028"$ ¿ÍÀ̾¼ $A_f$ ¿Âµµ´Â ¿Ã³¸® ½Ã°£À» 1ÃÊ Áõ°¡½ÃÄÑ ±¼°îÀ» ºÎ¿©ÇÑ ½ÇÇ豺¿¡¼ °¡Àå ³·°Ô °üÂûµÇ¾ú°í ¿Ã³¸®¸¦ ½ÃÇàÇÏ¿© ±¼°îÀ» ºÎ¿©ÇÑ ½ÇÇ豺, ¿Ã³¸®¸¸ ½ÃÇàÇÑ ½ÇÇ豺 ±×¸®°í ¿Ã³¸®¸¦ ½ÃÇàÇÏÁö ¾ÊÀº ´ëÁ¶±º ¼øÀ¸·Î ³ô°Ô °üÂûµÇ¾ú´Ù. ÀÌ»óÀÇ °á°ú¸¦ Á¾ÇÕÇÒ ¶§, ÀÓ»ó¿¡¼ ´ÏÄÌ-ƼŸ´½ ÇÕ±Ý ¿ÍÀ̾ ±¼°îÀ» ºÎ¿©Çϱâ À§ÇØ ¿Ã³¸®ÇÏ´Â °æ¿ì ÃÊź¼º Ư¼ºÀº À¯ÁöµÉ ¼ö ÀÖÀ¸³ª, ºÎÇÏ-º¯À§ °î¼±ÀÇ »ó¹æ Áõ°¡°¡ ³ªÅ¸³ª¹Ç·Î, ¿ÍÀ̾ ÀÇÇÑ ±³Á¤·ÂÀÌ Áõ°¡µÉ ¼ö ÀÖÀ½¿¡ À¯ÀÇÇÏ¿©¾ß ÇÑ´Ù.
Nickel-titanium alloy wire possesses excellent spring-back properties, shape memory and super-elasticity. In order to adapt this wire to clinical use, it is necessary to bend as well as to control its super-elastic force. The purpose of this study is to evaluate the effects of heat treatment on the load-deflection properties and transitional temperature range (TTR) of nickel-titanium wires. Methods: Nickel-titanium wires of different diameters ($0.016"\;{\times}\;0.022"$, $0.018"\;{\times}\;0.025"$ and $0.0215"\;{\times}\;0.028"$) were used. The samples were divided into 4 groups as follows: group 4, posterior segment of archwire (24 mm) without heat treatment; group 2, posterior segment of archwire (24 mm) with heat treatment only; group 3, anterior segment with bending and heat treatment; group 4, anterior segment with bending and 1 sec over heat treatment. Three point bending test was used to evaluate the change in load-deflection curve and obtained DSC (different scanning calorimetry) to check changes in $A_f$ temperature. Results: In the three point bending test, nickel-titanium wires with heat treatment only had higher load-deflection curve and loading and unloading plateau than nickel-titanium wires without heat treatment. Nickel-titanium wires with heat treatment had lower Af temperature than nickel-titanium wires without heat treatment. Nickel-titanium wires with heat treatment and bending had higher load-deflection curve than nickel- titanium wires with heat treatment and nickel-titanium wires without heat treatment. Nickel-titanium with heat treatment of over 1 sec and bending had the highest load-deflection curve. Nickel-titanium wires with heat treatment and bending had lower Af temperature, Nickel-titanium wires with heat treatment of over Af sec and bending had the lowest Af temperature. Conclusion: From the results of this study, it can be stated that heat treatment for bending of Nickel-titanium wires does not deprive the superelastic property but can cause increased force magnitude due to a higher load-deflection curve.
Å°¿öµå
´ÏÄÌ-ƼŸ´½;3Á¡ ±¼°î ½ÃÇè;ºÎÇÏ-º¯À§ °î¼±
Load-deflection curve;Three point bending;Nickel-titanium;Heat treatment
¿ø¹® ¹× ¸µÅ©¾Æ¿ô Á¤º¸
µîÀçÀú³Î Á¤º¸