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Self drilling°ú Self-tapping microscrew implantsÀÇ Á¶Á÷ÇÐÀû ¹× »ý¿ªÇÐÀûÀÎ ºñ±³

Histologic and biomechanical characteristics of orthodontic self-drilling and self-tapping microscrew implants

Korean Journal of Orthodontics 2006³â 36±Ç 4È£ p.295 ~ 307
¹ÚÈ¿»ó, ½´¿£, Á¤¼ºÈ­,
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¹ÚÈ¿»ó ( Park Hyo-Sang ) - °æºÏ´ëÇб³ Ä¡°ú´ëÇÐ ±³Á¤Çб³½Ç
½´¿£ ( Shue Yen ) - Kyungpook National University School of Dentistry Department of Orthodontics
Á¤¼ºÈ­ ( Jeong Seong-Hwa ) - °æºÏ´ëÇб³ Ä¡°ú´ëÇÐ ¿¹¹æÄ¡°úÇб³½Ç

Abstract

ÀÌ ¿¬±¸ÀÇ ¸ñÀûÀº ±³Á¤¿ë °íÁ¤¿øÀ¸·Î »ç¿ëµÈ self-drilling°ú self-tapping microscrew implants¸¦ Á¶Á÷ÇÐÀû ¹× »ý¿ªÀûÀ¸·Î ºñ±³ÇÏ´Â °ÍÀÌ´Ù. 28 ¸¶¸®ÀÇ °¡Åä¿¡ 112°³ÀÇ microscrew implants (56°³ÀÇ self-drilling microscrew implants ¿Í 56°³ÀÇ self-tapping microscrew implants)¸¦ ½Ä¸³ÇÏ¿´´Ù. Self-tapping microscrew implants´Â 0.9 mm µå¸±·Î¼­ ȨÀ» Çü¼ºÇÑ ÈÄ ½Ä¸³ÇÏ¿´°í self-drilling microscrew implants´Â ȨÀ» Çü¼ºÇÏÁö ¾Ê°í ¹Ù·Î ½Ä¸³ÇÏ¿´´Ù. ±³Á¤·ÂÀº ½Ä¸³ Á÷ÈÄ ¹Ù·Î NiTi coil springÀ» ¿¬°áÇÏ¿© °¡ÇÏ¿´À¸¸ç ÀϺδ ±³Á¤·ÂÀ» °¡ÇÏÁö ¾Ê¾Ò°í ÀϺδ 100 gmÁ¤µµÀÇ ¾àÇÑ ±³Á¤·ÂÀ» ÀϺδ 200 gmÁ¤µµÀÇ °­ÇÑ ±³Á¤·ÂÀ» °¡ÇÏ¿´´Ù. ½ÇÇ赿¹°Àº 3ÁÖ È¤Àº 5ÁÖ¿¡ Èñ»ýÇÏ¿´À¸¸ç 72°³ÀÇ ºñŻȸ Ç¥º»À» ¸¸µé¾î Àü¹ÝÀûÀÎ Á¶Á÷ÇÐÀû °üÂû°ú Á¶Á÷ °èÃøÀ» ½ÃÇàÇÏ¿´´Ù. ÅäÅ© °ÔÀÌÁö·Î ÃÖ´ë ½Ä¸³ ÅäÅ©¿Í ÃÖ´ë Á¦°Å ÅäÅ©¸¦ ÃøÁ¤ÇÏ¿´´Ù. ¸ðµç microscrew implants´Â ½ÇÇè±â°£ µ¿¾È ¾ÈÁ¤µÇ°Ô À¯ÁöµÇ¾ú°í ÃÖ´ë Á¦°Å ÅäÅ©ÀÇ ÃøÁ¤¿¡´Â self-drilling°ú self-tapping microscrew implants »çÀÌ¿¡ Åë°èÇÐÀûÀ¸·Î À¯ÀÌÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù. Á¶Á÷ °üÂû¿¡¼­ self-tapping microscrew implants¿¡¼­ °ñ ÀÓÇÁ¶õÆ® °è¸é¿¡ °ñ°á¼ÕÀÌ ´õ ¸¹¾Ò°í 5ÁÖ¿¡¼­´Â »õ·ÎÀÌ Çü¼ºµÈ ¹Ì¼º¼÷ °ñÀÌ ´õ ¸¹¾Ò´Ù. Self-drilling microscrew implants¿¡¼­ °ñÇ¥¸é ȤÀº °ñ³»¸·À¸·ÎÀÇ °ñ Çü¼ºÀÌ ¸¹ÀÌ °üÂûµÇ¾úÀ¸³ª 5ÁÖ¿¡¼­´Â Èí¼öµÇ´Â ¾ç»óÀ» º¸¿´´Ù. 3ÁÖ¿¡¼­´Â self-drilling microscrew implants°¡ ´õ ¸¹Àº °ñÁ¢ÃËÀ» º¸¿´À¸³ª 5ÁÖ¿¡¼­´Â µÎ ±º»çÀÌ¿¡ Â÷ÀÌ°¡ °üÂûµÇÁö ¾Ê¾Ò´Ù. ÀÌ °á°ú´Â µÎ ¹æ¹ýÀÌ ¸ðµÎ microscrew implantÀÇ ½Ä¸³¿¡ »ç¿ëµÉ ¼ö ÀÖÀ½À» ½Ã»çÇϳª self-tapping microscrew implantsÀÇ °æ¿ì Ãʱ⿡´Â ¾àÇÑ ÈûÀ» °¡ÇÏ´Â °ÍÀÌ ÁÁÀ» °ÍÀ¸·Î »ý°¢µÈ´Ù.

The purpose of this study was to compare the histological and biomechanical characteristics of self-tapping and self-drilling microscrew implants. Methods: 112 microscrew implants (56 self-drilling and 56 self-tapping) were placed into the tibia of 28 rabbits. The implants were loaded immediately with no force, light (100 gm), or heavy force (200 gm) with nickel-titanium coil springs. The animals were sacrificed at 3- and 5-weeks after placement and histologic and histomorphometric analysis were performed under a microscope. Results: All microscrew implants stayed firm throughout the experiment. There was no significant difference between self-drilling and self-tapping microscrew implants both in peak insertion and removal torques. Histologic examinations showed there were more defects in the self-tapping than the self-drilling microscrew implants, and newly formed immature bone was increased at the interface in the self-tapping 5-week group. There was proliferation of bone towards the outer surface of the implant and/or toward the marrow space in the self-drilling group. Histologically, self-drilling microscrew implants provided more bone contact initially but the two methods became similar at 5 weeks. Conclusion: These results indicate the two methods can be used for microscrew implant placement, but when using self-tapping microscrew implants, it seems better to use light force in the early stages.

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Microscrew implant;Pilot drill;Bone-implant contact;Removal torque

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SCI(E)
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