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The comparison of the frictional force by the type and angle of orthodontic bracket and the coated or non-coated feature of archwire

Korean Journal of Orthodontics 2011³â 41±Ç 6È£ p.399 ~ 410
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ÀåÅÂÈ£ ( Jang Tae-Ho ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç
±è»óö ( Kim Sang-Cheol ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç
Á¶ÁøÇü ( Cho Jin-Hyung ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç
äÁ¾¹® ( Chae Jong-Moon ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç
À峪¿µ ( Chang Na-Young ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç
°­°æÈ­ ( Kang Kyung-Hwa ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç

Abstract

º» ¿¬±¸ÀÇ ¸ñÀûÀº ÄÚÆÃµÈ È£¼±, ´Ù¾çÇÑ ºê¶óÄÏ, ±×¸®°í ºê¶óÄÏ-È£¼± °¢µµ°¡ ±³Á¤¿ë È£¼±ÀÌ ºê¶óÄÏÀ» È°ÁÖ À̵¿ÇÏ´Â µ¿¾È ¹ß»ýµÇ´Â ¸¶Âû·Â¿¡ ¾î¶°ÇÑ ¿µÇâÀ» ¹ÌÄ¡´ÂÁö¿¡ ´ëÇÏ¿© Æò°¡Çغ¸´Â °ÍÀ̾ú´Ù. °íÁ¤½Ä ÀåÄ¡¸¦ ÀÌ¿ëÇÑ ±³Á¤Ä¡·á ½Ã¹ß»ýÇÒ ¼ö ÀÖ´Â »óȲÀ» ½Ã¹Ä·¹À̼ÇÇϱâ À§ÇÏ¿© 4Á¾·ùÀÇ ºê¶óÄÏ(±Ý¼Ó ºê¶óÄÏÀÎ Micro-arch, ´Ü°áÁ¤ ¼¼¶ó¹Í ºê¶óÄÏÀÎ Perpect Clear2, active typeÀÇ ÀÚ°¡°áÂû ºê¶óÄÏÀÎ Clippy-C, passive typeÀÇ ÀÚ°¡°áÂû ºê¶óÄÏÀÎ Damon3)°ú 5Á¾·ùÀÇ ±³Á¤¿ë È£¼±(0.014", 0.016", 0.016" 0.022" inch coated Ni-Ti È£¼±, 0.016", 0.016" 0.022" inch Ni-Ti È£¼±)ÀÌ »ç¿ëµÇ¾ú°í ºê¶óÄÏ-È£¼± °¢µµ´Â °¢°¢ , , , ·Î Á¶ÀýµÇ¾ú´Ù. ¸ðµç ½ÇÇ豺¿¡¼­ ÀÚ°¡°áÂû ºê¶óÄϱº, Micro-arch±º, Perpect Clear2ÀÌ ¼øÀ¸·Î Á¤Áö, ¿îµ¿ ¸¶Âû·ÂÀÌ À¯ÀÇÇÏ°Ô ³ô¾Ò´Ù ( < 0.001). ¿Í ÀÇ ºê¶óÄÏ-È£¼± °¢µµ¿¡¼­ °°Àº Å©±âÀÇ Ni-Ti È£¼±Àº ÄÚÆà ¿©ºÎ¿¡ µû¸¥ Á¤Áö, ¿îµ¿ ¸¶Âû·ÂÀÇ À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾úÀ¸³ª, ¿¡¼­ ÀÚ°¡°áÂû ºê¶óÄϱºÀÇ 0.016" 0.022" inch Ni-Ti È£¼±¿¡¼­¸¸ ÄÚÆÃµÈ °æ¿ì¿¡ ¸¶Âû·ÂÀÌ À¯ÀÇÇÏ°Ô ³ô¾ÒÀ¸¸ç ( < 0.001), ¿Í ÀÇ ºê¶óÄÏ-È£¼± °¢µµ¿¡¼­ ¿øÇü°ú °¢Çü È£¼±Àº ¸ðµÎ °°Àº Å©±âÀÇ ÄÚÆÃµÈ È£¼±¿¡¼­ Á¤Áö, ¿îµ¿ ¸¶Âû·ÂÀÌ À¯ÀÇÇÏ°Ô ³ô¾Ò´Ù ( < 0.001). ÄÚÆÃµÈ È£¼±Àº Å©±â°¡ Ä¿Áú¼ö·Ï Á¤Áö, ¿îµ¿ ¸¶Âû·ÂÀÌ À¯ÀÇÇÏ°Ô ³ô¾ÆÁ³´Ù ( < 0.001). °¢Çü È£¼±Àº ¿øÇü È£¼± º¸´Ù Á¤Áö, ¿îµ¿ ¸¶Âû·ÂÀÌ À¯ÀÇÇÏ°Ô ³ô¾ÒÀ¸³ª, ÀÇ ºê¶óÄÏ-È£¼± °¢µµ¿¡¼­ 0.016" inch coated Ni-Ti È£¼±¸¸Àº 0.016" 0.022" inch Ni-Ti È£¼±º¸´Ù ¸¶Âû·ÂÀÌ ³ô¾Ò´Ù ( < 0.001). ºê¶óÄÏ-È£¼± °¢µµ°¡ Áõ°¡ÇÔ¿¡ µû¶ó Á¤Áö, ¿îµ¿ ¸¶Âû·Âµµ À¯ÀÇÇÏ°Ô ³ô¾ÆÁ³À¸³ª ( < 0.001), Micro-arch±º°ú Perpect Clear2±º¿¡¼­ 0.016 inch Ni-Ti È£¼±°ú ÀÌ·ç´Â °¢µµ , ¿¡¼­´Â ¸¶Âû·ÂÀÇ À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù.

Objective: The purpose of this study was to evaluate the difference in frictional resistance among metal, ceramic, self-ligation brackets and coated or non-coated Ni-Ti archwires at various bracket-archwire angulations during the sliding movement of an orthodontic archwire, using an orthodontic sliding simulation device.

Methods: Four types of bracket (Micro-arch Perpect Clear2 Clippy-C and Damon3 and 5 types of orthodontic archwire (0.014", 0.016", and 0.016" 0.022" inch coated Ni-Ti, and 0.016" and 0.016" 0.022" inch Ni-Ti) were used. Further, the bracket- archwire angles were set at 4 different angulations: , , , and .

Results: The frictions from all the experimental groups were found to be significantly increased in order of self-ligation brackets, Micro-arch and Perpect Clear2 ( < 0.001). The presence of a coat had no effect on the friction of the same sized archwires at and bracket-archwire angles ( < 0.001). Coated archwires had significantly higher frictions than the same sized non-coated archwires at and bracket-archwire angles ( < 0.001). The frictions increased significantly as the bracket-archwire angles were increased ( < 0.001).

Conclusions: The use of self-ligation brackets will be beneficial in clinical situations where a low frictional force is required. Further, in cases where crowding is not severe, the use of coated archwires should not cause problems. However, more additional explanation is required considering the fact that the damage of coated archwire and exposure of the metal portion in case of binding and notching and the effects of saliva were not taken into account.

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¸¶Âû·Â; ÄÚÆÃµÈ Ni-Ti È£¼±; ±³Á¤¿ë ºê¶óÄÏ
Friction; Coated Ni-Ti archwire; Orthodontic bracket

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