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EFFECTS OF SPUTTERED FILM DEPOSITION ON THE ELECTROCHEMICAL CORROSION OF DENTAL MAGNETIC MATERIALS IN MODIFIEO ARTIFICIAL SALIVA

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Abstract

°á·Ð
Ä¡°ú¿ë ÀÚ¼ºÀç´Â Ä¡°ú¿¡¼­ °¡Ã¶¼º ±¹¼ÒÀÇÄ¡, ¾Ç¾È¸é º¸Ã¶¹°, Æó¼âÀåÄ¡, ÀÓÇöõÆ® µî¿¡ ´Ù
¾çÇÏ°Ô ÀÀ¿ëµÇ°í ÀÖÀ¸³ª ¾ÆÁ÷ ±¸°­³»¿¡¼­ ³»ºÎ½Ä¼ºÀÌ ¾àÇÑ ´ÜÁ¡À» °®°í ÀÖ´Ù. ±×·¯³ª ¾ÆÁ÷
À̸¦ ÇØ°áÇÒ ¼ö ÀÖ´Â ¿ÏÀüÇÑ ¹æ¹ýÀÌ ¾ø´Â ½ÇÁ¤À̾ º» ¿¬±¸¿¡¼­´Â Ä¡°ú¿ë ÀÚ¼ºÀçÀÇ ³»ºÎ
½Ä¼ºÀ» Áõ°¡½ÃÅ°±â À§ÇÏ¿© Ä¡°ú¿¡¼­ ÁÖ·Î »ç¿ëÇÏ´Â Sm-Co°è ÀÚ¼ºÀç¿Í Nd-Fe-B°è ÀÚ¼ºÀç
Ç¥¸éÀ» ±Ý, ¹é±Ý, ƼŸ´½, Å©·Ò, ÄÚ¹ßÆ®·Î ½ºÆÛÅ͸µ µµ±ÝÇÑ ±ºÀ» µµ±Ý±º, ½ºÆÛÅ͸µ µµ±ÝÇÏÁö
¾ÊÀº ±ºÀ» ´ëÁ¶±ºÀ¸·ÎÇÏ¿© Modified Fusayama¡¯s artificial saliva ÀüÇؾ׿¡¼­ Àü±âÈ­ÇÐÀû
ºÎ½ÄÀ» ½ÃŲ ÈÄ À̵éÀÇ ºÎ½Ä ¾ç»ó, ¿ëÃâ ¿ø¼ÒÀÇ ¾ç, Àڼӹеµ, Ç¥¸éÁ¶µµ, Ç¥¸é¹Ì¼¼°æµµ ¹× ±Ý
¼ÓÇ¥¸éÀ» °üÂû ºñ±³Çؼ­ ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. ´ëÁ¶±ºÀÌ µµ±Ý±ºº¸´Ù °ø½ÄÀüÀ§°¡ ³·¾Æ ºÎ½ÄÀÌ ´õ ½ÉÇÏ°Ô ¹ß»ýÇÏ¿´´Ù.
2. µµ±Ý±ºÀÇ °æ¿ì ¿ø¼Ò ¿ëÃâ·®ÀÌ ´ëÁ¶±ºº¸´Ù À¯ÀǼº ÀÖ°Ô °¨¼ÒÇÏ¿´´Ù(p<0.05).
3. Àڼӹеµ °¨¼ÒÀ²Àº 1Â÷ ºÎ½Ä ÈÄ µµ±Ý±ºÀÌ ´ëÁ¶±ºº¸´Ù À¯ÀǼºÀÖ°Ô ³·¾ÒÀ¸¸ç(p<0.05) 2
Â÷ ºÎ½Ä ÈÄ¿¡´Â Àڼӹеµ °¨¼ÒÀ²ÀÌ ¸ðµç ½ÃÇ豺¿¡¼­ Áõ°¡ÇÏ¿´´Ù.
4. µµ±Ý±ºÀÇ Ç¥¸éÁ¶µµ´Â ´ëÁ¶±º°ú Â÷ÀÌ°¡ ¾ø¾úÀ¸¸ç ºÎ½Ä ÈÄ Sm-Co°è ÀÚ¼ºÀç¿Í Nd-Fe-B
°è ÀÚ¼ºÀç´Â Ç¥¸éÁ¶µµ°¡ Áõ°¡ÇÏ¿´´Ù.
5. ºÎ½ÄÀü µµ±Ý±ºÀÇ Ç¥¸é¹Ì¼¼°æµµ´Â ´ëÁ¶±º°ú Â÷ÀÌ°¡ ¾ø¾úÀ¸¸ç ºÎ½Ä ÈÄ Ç¥¸é¹Ì Á¦°æµµ´Â
¸ðµç ½ÃÇ豺¿¡¼­ °¨¼ÒÇÏ¿´°í µµ±Ý±ºº¸´Ù ´ëÁ¶±ºÀÌ ±×¸®°í 1Â÷ ºÎ½Äº¸´Ù 2Â÷ ºÎ½Ä¿¡¼­ ´õ ¸¹
ÀÌ °¨¼ÒÇÏ¿´´Ù.
6. ´ëÁ¶±ºÀÇ ÀÔ°è¿¡¼­´Â ºÎ½ÄÀÌ »ý°Ü Àü¸é ºÎ½ÄÀÌ ¹ß»ýÇÏ¿´À¸¸ç µµ±Ý±º¿¡¼­´Â ±â°øÀÌ Á¸
ÀçÇÑ ºÎÀ§¿¡ ±¹¼ÒÀûÀ¸·Î °ø½ÄÀÌ ¹ß»ýÇÏ¿´´Ù.
ÀÌ»óÀÇ °á°ú·Î Ä¡°ú¿ë ÀÚ¼ºÀçÀÇ Ç¥¸éÀ» ±Ý¼ÓÀ¸·Î ½ºÆÛÅ͸µ µµ±ÝÇÔÀ¸·Î ÀÚ¼ºÀçÀÇ ºÎ½Ä¹®Á¦
¸¦ ÇØ°áÇÒ ¼ö ÀÖÀ» °ÍÀ¸·Î »ç·áµÇ¾ú´Ù.
#ÃÊ·Ï#
Dental magnetic materials haute been applied to removable prosthetic appliances,
maxillofacial prostheses, obturator and dental implant but they still have some problems
such as low corrosion resistance in oral environments. To increase the corrosion
resistance of dental magnetic materials, surfaces of Sm-Co and Nd-Fe-B based
magnetic materials were plated with gold(Au), platinum(Pt), titanium(Ti), chromium(Cr)
and cobalt(Co), and then electrochemical corrosion test were performed in modified
Fusayama¡¯s artificial saliva. From this study, corrosion behavior, decreasing rate of
magnetic flux density, amount of elements released, mean average surface roughness
values and the changing of mean surface microhardness values were measured
comparing with control group of non-sputtered plating magnetic materials.
The results were as follows :
1. In Sm-Co and Nd-Fe-B based magnetic materials, the pitting corrosion of control
group was lower than that of the experimental group, the control group was more
corrosive than experimental group.
2. The amount of elements released from experimental group was more significantly
decreased than that of control group(p<0.05).
3. Decreasing rate of magnetic flux density of experimental groups was significantly
lower than that of control group after first corrosion, but it was increased after second
corrosion in all tested cases.
4. The mean average surface roughness values of control group were not different
from those of experimental group. The mean average surface roughness value of both
Sm-Co and Nd-Fe-B based magnetic materials were much increased in modified
Fusayama's artificial saliva after corrosion.
5. The mean average surface microhardness values of control group were not different
from those of experimental group before corrosion. After corrosion, the same values of
control group were more decreased than those of experimental group, and the decreasing
rate of sur0face microhardness values after second corrosion was higher than that of
values after first corrosion.
6. Intergranular corrosion started first from the grain boundary of the control group
and they advanced gradually to general corrosion, and the pitting corrosion occurred
locally at area of existing pits in experimental group.
In conclusion, it is considered that the corrosion problem of dental magnetic materials
could be solved to some extent by sputtered plating with several metals on the surface
of dental magnetic materials.

dental magnetic materials; electrochemical corrosion test; sputtered plating; corrosion resistance; amount of elements released; magnetic flux density2 surface roughness; surface microhardness;

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