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Evaluation of cytotoxicity of electroplated stainless steel orthodontic wire

Korean Journal of Orthodontics 2005³â 35±Ç 2È£ p.127 ~ 136
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Abstract

º» ¿¬±¸´Â Àü±âµµ±ÝÀ» ÀÌ¿ëÇÏ¿© ±³Á¤¿ë ½ºÅ×Àη¹½º½ºÆ¿ ¼±ÀçÀÇ Á÷°æÀ» Áõ°¡½ÃŲ ÈÄ ¼¼Æ÷µ¶¼ºÀ» ¾Ë¾Æº½À¸·Î½á ÀÌÀÇ ÀÓ»óÀû Àû¿ë °¡´É¼ºÀ» ¾Ë¾Æº¸°íÀÚ ½ÃÇàµÇ¾ú´Ù. ½ÃÆǵǰíÀÖ´Â ±³Á¤¿ë ½ºÅ×Àη¹½º½ºÆ¿ ¼±Àç¿¡ Àü±âµµ±Ý ¹æ¹ýÀ» ÀÌ¿ëÇÏ¿© ´ÏÄÌÀ» µµ±ÝÇÑ ÈÄ, À̸¦ µµ±ÝÇÏÁö ¾ÊÀº ±³Á¤¿ë ½ºÅ×Àη¹½º½ºÆ¿ ¼±Àç ±×¸®°í ƼŸ´½ ¶Ç´Â ±¸¸®¿Í ºñ±³Çϱâ
À§ÇÏ¿© À̵éÀ» ¹èÁö¿¡ ³Ö°í 72½Ã°£ ¹è¾çÇÏ¿´´Ù.
ÀÌ ¹è¾ç¾×À» ±Ý¼Ó À¯¸®·® ÃøÁ¤À» À§ÇØ ICP-AES(inductively coupled plasma atomic
emission spectrophotometer) ºÐ¼®À» ½ÃÇàÇÑ °á°ú Àü±âµµ±ÝÇÑ ¼±Àç¿¡¼­ ¸¹Àº ¾çÀÇ ´ÏÄÌ ÀÌ¿ÂÀÌ À¯¸®µÇ¾úÀ¸¸ç, ±¸¸®¿¡¼­´Â ¸¹Àº ¾çÀÇ ±¸¸® ÀÌ¿ÂÀÌ À¯¸®µÇ¾ú´Ù. Microplate¿¡ Balb/c 3T3 mouse fibroblast¸¦ ³Ö°í °¢ ¼±À縦 ¹è¾çÇÑ ¹è¾ç¾×À» 75%, 50%, 25%·ÎÈñ¼®½ÃÄÑ Ã·°¡ÇÑ ÈÄ MTT (3-[4.5-dimethylthiazol-2yl]-2.5-diphenyl tetrazolium
bromide)ºÐ¼®À» ½ÃÇàÇÏ¿© À̸¦ ¹èÁö¸¸À» ÷°¡ÇÑ °æ¿ì¿Í Èí±¤µµ¸¦ ºñ±³ÇÏ¿´´Ù.
ƼŸ´½Àº ¸ðµç ³óµµ¿¡¼­ ¹èÁö¸¸À» ÷°¡ÇÑ °æ¿ì¿¡ ºñÇØ Èí±¤µµ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾ÒÁö¸¸Àü±âµµ±ÝÇÑ ¼±Àç(p£¼0.001), ½ºÅ×Àη¹½º½ºÆ¿¼±Àç(p£¼0.05), ±¸¸®(p£¼0.001)´Â ¹èÁö¸¸À» ÷°¡ÇÑ °æ¿ìº¸´Ù Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Èí±¤µµ °¨¼Ò¸¦ º¸¿´´Ù. ISO 10993, part5¿¡ µû¶ó ±¸¸®´Â "°­ÇÑ µ¶¼º"À» º¸ÀÌ´Â ¹Ý¸é ƼŸ´½°ú ½ºÅ×Àη¹½º½ºÆ¿ ¼±Àç´Â "¹«µ¶¼º", ±×¸®°í Àü±âµµ±Ý ¼±Àç´Â "Áߵ µ¶¼º"À¸·Î ³ªÅ¸³µ´Ù. ÀÌ»óÀÇ °á°ú´Â Àü±âµµ±ÝÀ» ÀÌ¿ëÇÏ¿© ±³Á¤¿ë ¼±ÀçÀÇ Á÷°æÀ» Áõ°¡½ÃÅ°´Â ¹æ¹ýÀÌ ÀÓ»ó¿¡ Àû¿ëµÇ±â À§Çؼ­´Â ¼¼Æ÷µ¶¼ºÀ» ÁÙÀ̱â À§ÇÑ Ãß°¡ÀÇ ¿¬±¸°¡ ÇÊ¿äÇÔÀ» ½Ã»çÇÏ¿´´Ù.

The purpose of this study was to examine the cytotoxicity of orthodontic wire
which had an increased diameter through electroplating, and to evaluate its
possoble clinical applications. First nickel plating was carried out on the
commercially available stainless steel wire using an electroplating technique.
For the comparison of the electroplated wire with ready made stainless steelwire
and titanium or copper, each wire was incybated for 72 hours in a medium.
The release of the metal ion was measured using ICP-AES(Inductively Coupled Plasma Atomic Emission Spectrophotometer). Balb/c 3T3 mouse fibroblast was put on a microplate and placed in an incubated medium of 75%, 50%, and 20%
dilation. An MTT analysis was used to compare with the medium only. The changein
absorbency value of each wire group and the difference of absorbency value
according to the change of dilution was measured. The results of ICP-AES
analysis showed that great amount nickel ion was isolated from electrpolated
orthodontic wires and great amount copper ion was isolated from copper.The
results of the MTT analysis showed that there was no difference in the
absorbency value of titanium at any dilution. However the electroplated wires(p£¼0.001), the stainless steel wires(p£¼0.05) and the copper(p£¼0.001) were
statistically significantly lower than those of medium only at all dilutions.
Assessment as per ISO 10993, part5, showed that electroplated wire was alloted
to "moderate cytotoxic", the titanium and stainless steel wire were
"non-cytotoxic". The results of this study indicate that the electroplated or
thodontic wires need additional efforts to dectease cytotoxicity for their
clinical applications.

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Àü±âµµ±Ý;±³Á¤¿ë ½ºÅ×Àη¹½º½ºÆ¿ ¼±Àç;¼¼Æ÷µ¶¼º;Electroplating;Stainless steel orthodontic wire;Cytotoxicity

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