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Comparison of frictional forces between orthodontic brackets and archwires

Korean Journal of Orthodontics 2005³â 35±Ç 2È£ p.116 ~ 126
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Abstract

º» ¿¬±¸´Â °íÁ¤¼º ÀåÄ¡¸¦ ÀÌ¿ëÇÑ ±³Á¤ Ä¡·á¿¡¼­ ºê¶óÄÏ°ú ±³Á¤¿ë È£¼± »çÀÌÀÇ È°ÁÖ À̵¿ µ¿¾È ¹ß»ýÇÏ´Â ¸¶Âû·Â¿¡ µðÀÚÀΰú ÀçÁúÀÌ ´Ù¸¥ °¢°¢ÀÇ ºê¶óÄÏ°ú ¿©·¯ Á¾·ùÀÇ È£¼±, ´Ù¾çÇÑ ºê¶óÄÏ-È£¼± °¢µµ µîÀÌ ¾î¶² ¿µÇâÀ» ¹ÌÄ¡´Â°¡¸¦ ¾Ë¾Æº¸±â À§ÇÏ¿© 4Á¾ÀÇ ºê¶óÄÏ(stainless steel twin ºê¶óÄÏÀÎ Gemini^(£¿), Á¼Àº ±Ù¿ø½É Æø°æ°ú single bracketÀÇ µðÀÚÀÎÀÌ Æ÷ÇÔµÈ Mini Uni-Twin^(£¿), metal-reinforced ¼¼¶ó¹Í ºê¶óÄÏÀÎ Clarity^(£¿), ¼¼¶ó¹Í ºê¶óÄÏÀÎ Transcend^(£¿)À» »ç¿ëÇÏ°í, 3Á¾ÀÇ ±³Á¤¿ë È£¼±(0.016¢©. 0.016¡¿0.022¢© stainless steelÈ£¼±, 0.016¢©Nitinol)À» ÀÌ¿ëÇÏ¿© ºê¶óÄÏ-È£¼± °¢µµ¸¦ 0¢ª, 3¢ª, 9¢ª·Î Á¶ÀýÇϸ鼭 ½ÇÇèÇÑ °á°ú, Gemini^(£¿)´Â À¯ÀÇÇÏ°Ô °¡Àå ³·Àº Á¤Áö, ¿îµ¿ ¸¶Âû·ÂÀ» º¸¿´À¸¸ç(P£¼0.001), Clarty^(£¿)´Â 0¢ªÀÇ ºê¶óÄÏ-È£¼± °¢µµ¿¡, Transcend^(£¿)´Â 6¢ª¿Í 9¢ªÀÇ °¢µµ¿¡¼­ À¯ÀÇÇÏ°Ô °¡Àå³ôÀº Á¤Áö, ¿îµ¿ ¸¶Âû·ÂÀ» º¸¿´°í(P£¼0.001), 0.016¡¿0.022¢© stainless steel °¢Çü È£¼±Àº À¯ÀÇÇÏ°Ô °¡Àå ³ôÀº Á¤Áö, ¿îµ¿ ¸¶Âû·ÂÀ» º¸¿´À¸¸ç(P£¼0.01),0.016¢© stainless steel ¿øÇüÈ£¼±Àº 0¢ª¿Í3¢ªÀÇ ºê¶óÄÏ-È£¼± °¢µµ¿¡¼­(P£¼0.01), 0.016¢© NitinolÀº 6¢ª¿Í9¢ªÀÇ °¢µµ¿¡¼­ (P£¼0.001)À¯ÀÇÇÏ°Ô °¡Àå ³·Àº Á¤Áö, ¿îµ¿¸¶Âû·ÂÀ» º¸¿´°í ºê¶óÄÏ-È£¼± °¢µµ°¡ Áõ°¡ÇÔ¿¡ µû¶ó À¯ÀÇÇÏ°Ô Á¤Áö, ¿îµ¿¸¶Âû·Âµµ Áõ°¡ ÇÏ¿´´Ù(P£¼0.001)

The object of this study was to evaluate how friction that occurs during the
sliding movement of an orthodontic archwire through orthodontic brackets is
differently affected by variant designs and ingredients of brackets and
archwires and bracket-archwire angles. In order to simulate the situations which
could occur during orthodontic treatment with fixed appliances, 4 types of
brackets(Gemini^(£¿), a stainless steel twin bracket:Mini Uni-Twin^(£¿), a
stainless steel bracket with a single bracket design and narrow mesio-distal
width: Clarity^(£¿), a metal-reinforced cermic braket: T ranscend^(£¿), a ceramic bracket)and 3 types of orthodontic archwires (0.016¢©, 0.016¡¿0.022 stainless steel, 0.016¢© Nitinol)were used and the bracket-archwire angles were controlled as 0¢ª,3¢ª,6¢ª, and 9¢ª, Gemini^(£¿) significantly showed the lowest static and kinetic frictions (P£¼0.001). Clarity showed the highest static and kinetic frictions with a bracket-archwire angle of 0¢ª, and Transcend at 6¢ª and 9¢ª(P£¼0.001). An 0.016¡¿0.022¢© stainless steel rectangylar archwire significantly showed the highest static and kinetic frictions(P£¼0.01). The lowest static and kinetic frictions were observed when the bracket-archwire angles were 0¢ª and 3¢ª with 0.016¢© stainless steel round archwires(P£¼0.01), and 6¢ª and 9¢ª with 0.016 Nitinol(P£¼0.001). The static and kinetic frictions were increased as the bracket-archwire angles were increased(P£¼0.001).

Å°¿öµå

¸¶Âû;±³Á¤¿ë ºê¶óÄÏ;±³Á¤¿ë È£¼±;Friction;Orthodontic bracket;Orthodontic archwire

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