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Influence of surface treatment on the insertion pattern of self-drilling orthodontic mini-implants

Korean Journal of Orthodontics 2011³â 41±Ç 4È£ p.268 ~ 279
±è»óö, ±èÈ£¿µ, ÀÌ»óÀç, ±èö¹®,
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±è»óö ( Kim Sang-Cheol ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç
±èÈ£¿µ ( Kim Ho-Young ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç
ÀÌ»óÀç ( Lee Sang-Jae ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ ±³Á¤Çб³½Ç
±èö¹® ( Kim Cheol-Moon ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ ±³Á¤Çб³½Ç

Abstract

º» ¿¬±¸ÀÇ ¸ñÀûÀº À¯Áö·ÂÀ» ³ôÀ̱â À§ÇÏ¿© ±³Á¤¿ë ¹Ì´Ï ÀÓÇ÷£Æ®¿¡ Ç¥¸é󸮸¦ ½ÃÇàÇ쵂 ½Ä¸³ °úÁ¤ÀÇ ¿ëÀ̼º¿¡ ¿µÇâÀ» ÁÖÁö ¾Ê´Â Ç¥¸éó¸® ¹æ¹ýÀ» ã±â À§ÇÔÀÌ´Ù. ±³Á¤¿ë ¹Ì´Ï ÀÓÇ÷£Æ®¸¦ etching, resorbable blasting media (RBM), »óºÎ ³ª»ç»ê ºÎÀ§¸¸ RBM 󸮸¦ ÇÑ hybrid µîÀÇ 3°¡Áö ¹æ¹ýÀ¸·Î Ç¥¸éó¸®ÇÑ ÈÄ machined (Ç¥¸é ¹Ìó¸®)±º°ú ºñ±³ÇÏ¿´´Ù. ÁÖ»çÀüÀÚÇö¹Ì°æ°ú Ç¥¸é °ÅÄ¥±â ÃøÁ¤±â·Î Ç¥¸é °ÅÄ¥±â¸¦ ºñ±³ÇÏ¿´À¸¸ç, driving torque tester¸¦ ÀÌ¿ëÇØ ½ÇÇè¿ë Àΰø°ñ¿¡ ±³Á¤¿ë ¹Ì´Ï ÀÓÇ÷£Æ®¸¦ ½Ä¸³ÇÏ¿©, ½Ä¸³ ÅäÅ©(rotational torque)¿Í ¼öÁ÷·Â(vertical loading)ÀÇ ½Ä¸³ ÆÐÅÏÀ» ºñ±³ÇÏ¿´´Ù. Machined surface±º°ú ºñ±³ÇÏ¿© acid etching±º¿¡¼­´Â Ç¥¸é °ÅÄ¥±â(Ra °ª)°¡ Å©Áö ¾Ê¾ÒÀ¸³ª (p £¾ 0.05), RBM±ºÀ̳ª hybrid±º¿¡¼­ Ç¥¸é °ÅÄ¥±â(Ra °ª)°¡ À¯ÀÇÇÏ°Ô ÄÇ´Ù (p £¼ 0.05). ÃÖÁ¾ ½Ä¸³ ÅäÅ©´Â ¸ðµç Ç¥¸é󸮱º¿¡¼­ machined±ºº¸´Ù ÄÇ´Ù (p £¼ 0.05). ÃÖ´ë ½Ä¸³¼öÁ÷·ÂÀº hybrid±ºÀÌ machined±ºÀ̳ª etched±ºº¸´Ù À¯ÀÇÇÏ°Ô ÀÛ¾ÒÀ¸¸ç (p £¼ 0.05), RBM±ºÀÌ °¡Àå ÄÇ´Ù (p £¼ 0.05). ±³Á¤¿ë ¹Ì´Ï ÀÓÇ÷£Æ®ÀÇ À¯Áö·ÂÀ» ³ôÀ̱â À§ÇÏ¿© º¸Ã¶¿ë ÀÓÇ÷£Æ®¿Í °°Àº ¹æ¹ýÀ¸·Î Àü¸é Ç¥¸é󸮸¦ Çϸé self drilling type °íÀ¯ÀÇ °ñ »èÁ¦±â´ÉÀÌ ÀúÇ쵃 ¼ö ÀÖ´Ù. ±×·¯³ª cutting edge ÀÏÁ¤ ºÎÀ§¸¦ Á¦¿ÜÇϸç ÀûÀýÇÏ°Ô Á¶ÀýµÈ Ç¥¸é󸮸¦ ÇÏ¸é °ñ »èÁ¦ ´É·ÂÀÇ Å« ÀúÇÏ ¾øÀÌ ¿ëÀÌÇÑ ½Ä¸³ÀÌ °¡´ÉÇÒ °ÍÀ¸·Î º¸ÀδÙ.

Objective:The purpose of this study was to compare self-drilling orthodontic mini-implants of different surfaces, namely, machined (untreated), etched (acid-etched), RBM (treated with resorbable blasting media) and hybrid (RBM + machined), with respect to the following criteria: physical appearance of the surface, measurement of surface roughness, and insertion pattern.

Methods:Self-drilling orthodontic mini-implants (Osstem implant, Seoul, Korea) with the abovementioned surfaces were obtained. Surface roughness was measured by using a scanning electron microscope and surface-roughness-testing machine, and torque patterns and vertical loadings were measured during continuous insertion of mini-implants into artificial bone (polyurethane foam) by using a torque tester of the driving-motor type (speed, 12 rpm).

Results:The mini-implants with the RBM, hybrid, and acid-etched surfaces had slightly increased maximum insertion torque at the final stage (p £¼ 0.05). Implants with the RBM surface had the highest vertical load for insertion (p £¼ 0.05). Testing for surface roughness revealed that the implants with the RBM and hybrid surfaces had higher Ra values than the others (p £¼ 0.05). Scanning electron microscopy showed that the implants with the RBM surface had the roughest surface.

Conclusions:Surface-treated, self-drilling orthodontic mini-implants may be clinically acceptable, if controlled appropriately.

Å°¿öµå

±³Á¤¿ë ¹Ì´Ï ÀÓÇ÷£Æ®; RBM Ç¥¸éó¸®; Self drilling; ½Ä¸³ ÆÐÅÏ
Orthodontic mini-implant; RBM surface treatment; Self-drilling; Insertion pattern

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