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Three dimensional analysis of tooth movement using different types of maxillary molar distalization appliances

Korean Journal of Orthodontics 2008³â 38±Ç 6È£ p.376 ~ 387
±è¼öÁø, Á¤»óÇõ, ÀüÀ±½Ä, ¹Ú¼±Çü,
¼Ò¼Ó »ó¼¼Á¤º¸
±è¼öÁø ( Kim Su-jin ) - ÀÌÈ­¿©ÀÚ´ëÇб³ ÀÇ°ú´ëÇÐ Ä¡°úÇб³½Ç
Á¤»óÇõ ( Jung Sang-Hyuk ) - ÀÌÈ­¿©ÀÚ´ëÇб³ ÀÇ°ú´ëÇÐ ¿¹¹æÀÇÇб³½Ç
ÀüÀ±½Ä ( Chun Youn-Sic ) - ÀÌÈ­¿©ÀÚ´ëÇб³ ÀÇ°ú´ëÇÐ Ä¡°úÇб³½Ç
¹Ú¼±Çü ( Park Sun-Hyung ) - ÀÌÈ­¿©ÀÚ´ëÇб³ ÀÇ°ú´ëÇÐ Ä¡°úÇб³½Ç

Abstract

ÃÖ±Ù ±³Á¤¿ë ¹Ì´ÏÀÓÇöõÆ®°¡ »ç¿ëµÇ¸é¼­ °íÁ¤¿ø ¼Ò½Ç ¹®Á¦¸¦ ÇØ°áÇÒ ¼ö ÀÖ°Ô µÇ¾î, º» ¿¬±¸ÀÇ ¸ñÀûÀº pendulum ÀåÄ¡, ¹Ì´ÏÀÓÇöõÆ®¸¦ µ¿¹ÝÇÑ pendulumÀåÄ¡(Ææµâ·³), ¿ÀÇÂÄÚÀÏ ½ºÇÁ¸µ ¹× ¹Ì´ÏÀÓÇöõÆ®¸¦ µ¿¹ÝÇÑ ¿ÀÇÂÄÚÀÏ ½ºÇÁ¸µ ÀÌ¿ë ½Ã °¢°¢ÀÇ Ä¡¾ÆÀ̵¿ ¾ç»óÀ» 3Â÷¿øÀûÀ¸·Î ºÐ¼®ÇÏ´Â µ¥ ÀÖ¾ú´Ù. »ó¾Ç ÁÂÃø Ä¡Á¶°ñ ¹× Ä¡¾Æ ¸ðÇüÀ» Á¦ÀÛÇÏ°í, Calorific machine?À» ÀÌ¿ëÇÏ¿© ¸ðÇü»ó¿¡¼­ ´ë±¸Ä¡¸¦ 3 mm ¿ø½ÉÀ̵¿½ÃÄ×´Ù. ½ÇÇèÀº 5ȸ¾¿ ¹Ýº¹ ½Ç½ÃÇÏ¿´´Ù. ¸ðµ¨À» Àü»êÈ­ ´ÜÃþ ÃÔ¿µÇÑ ÈÄ V-WorksTM¸¦ ÀÌ¿ëÇÏ¿© 3Â÷¿ø ¸ðµ¨À» Á¦ÀÛÇÏ¿´´Ù. RapidformTM»ó¿¡¼­ 3Â÷¿øÀûÀ¸·Î À̵¿¹æÇâ°ú À̵¿·®À» °èÃøÇÏ¿´°í, °¢°¢ÀÇ ÀåÄ¡¿¡ °üÇÑ Åë°èÀû À¯ÀǼºÀ» °ËÁ¤ÇÏ¿´´Ù. ¿¬±¸°á°ú, ±³Á¤¿ë ¹Ì´ÏÀÓÇöõÆ®¸¦ °£Á¢ °ñ¼º °íÁ¤¿øÀ¸·Î ÀÌ¿ëÇÏ¿© ¿ÀÇÂÄÚÀÏ ½ºÇÁ¸µÀ¸·Î ±¸Ä¡ºÎ¸¦ ¿ø½ÉÀ¸·Î À̵¿½ÃÄ×À» ¶§°¡ ġüÀ̵¿¿¡ °¡Àå °¡±î¿î À̵¿¾ç»óÀ» º¸¿´°í, °íÁ¤¿ø ¼Ò½Çµµ Àû°Ô ³ªÅ¸³µ´Ù (p £¼ 0.05). ¿ÀÇÂÄÚÀÏ ½ºÇÁ¸µ, Ææµâ·³ ÀåÄ¡ ¸ðµÎ ¹Ì´ÏÀÓÇöõÆ®¸¦ ºÎ°¡ÀûÀ¸·Î ÀÌ¿ëÇßÀ» ¶§ °íÁ¤¿ø ¼Ò½Ç·®ÀÌ Àû¾ú´Ù (p £¼ 0.05). ¹Ì´ÏÀÓÇöõÆ®¸¦ ÀÌ¿ëÇÏÁö ¾ÊÀº °æ¿ì¿¡´Â µÎ ÀåÄ¡ÀÇ °íÁ¤¿ø ¼Ò½Ç·®ÀÌ ºñ½ÁÇÏ¿´´Ù. ¹Ì´ÏÀÓÇöõÆ®ÀÇ ÀÌ¿ë ¿©ºÎ¿Í °ü°è¾øÀÌ Ææµâ·³ ÀåÄ¡·Î »ó¾Ç ±¸Ä¡ ¿ø½É À̵¿ ½Ã ¿ÀÇÂÄÚÀÏ ½ºÇÁ¸µ¿¡ ºñÇØ Á¦1´ë±¸Ä¡°¡ Á¶Àý¼º °æ»çÀ̵¿ ¾ç»óÀ¸·Î À̵¿µÇ¾ú°í (p £¼ 0.05), Á¦2´ë±¸Ä¡´Â ºñÁ¶Àý¼º °æ»çÀ̵¿ ¾ç»óÀ» º¸¿´À¸¸ç, Ä¡°üÀÇ ÇùÃø°æ»çÀ̵¿ÀÌ ÀϾ´Ù (p £¼ 0.05). ÀÌ¿Í °°Àº °á°ú¸¦ ±Ù°Å·Î °£Á¢ °ñ¼º °íÁ¤¿øÀ» ÀÌ¿ëÇÑ ¿ÀÇÂÄÚÀÏ ½ºÇÁ¸µÀÌ »ó¾Ç ±¸Ä¡ÀÇ ¿ø½ÉġüÀ̵¿¿¡ °¡Àå È¿°úÀûÀÎ ÀåÄ¡¿´À¸¸ç, Ææµâ·³ ÀåÄ¡¸¦ ÀÌ¿ëÇÑ ±¸Ä¡ºÎ ¿ø½ÉÀ̵¿ ½Ã¿¡´Â Ãß°¡ÀûÀÎ Á¶ÀýÀÌ ÇÊ¿äÇÏ´Ù°í ÇÒ ¼ö ÀÖ´Ù.

Objective: The purpose of this study was to compare the three dimensional changes of tooth movement using 4 different types of maxillary molar distalization appliances; pendulum appliance (PD), mini-implant supported pendulum appliance (MPD), stainless steel open coil spring (SP) and mini-implant supported stainless steel open coil spring (MSP).

Methods: These experiments were performed using the Calorific machine? which can simulate dynamic tooth movement. Computed tomography (CT) images of the experimental model were taken before and after tooth movement in 1 mm thicknesses and reconstructed into a three dimensional model using V-works 4.0TM. These reconstructed images were superimposed using Rapidform 2004TM and the direction and amount of tooth movement were measured.

Results: The mean reciprocal anchor loss ratio at the first premolar was 17 - 19% for the PD and SP groups. The appliances using mini-implants (MPD or MSP) resulted in less anchorage loss (7 - 8%). On application of a pendulum appliance or MPD, distalization was obtained by tipping rather than by bodily movement. Furthermore, the maxillary second molar tipped distally and bucally. But on application of MSP, distalization was achieved almost by bodily movement.

Conclusions: Regarding tooth movement patterns during molar distalization, stainless steel open coil spring with indirect skeletal anchorage was relatively superior to other methods.

Å°¿öµå

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Molar distalization;Mini-implant;Indirect anchorage;Calorific machine

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