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Factors affecting orthodontically induced root resorption of maxillary central incisors in the Korean population

Korean Journal of Orthodontics 2011³â 41±Ç 3È£ p.174 ~ 183
Á¤µ¿È­, ¹Ú¿µ±¹, ±è±¤¿ø, Â÷°æ¼®,
¼Ò¼Ó »ó¼¼Á¤º¸
Á¤µ¿È­ ( Jung Dong-Hwa ) - ´Ü±¹´ëÇб³ Ä¡°ú´ëÇÐ ±³Á¤Çб³½Ç
¹Ú¿µ±¹ ( Park Young-Guk ) - °æÈñ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç
±è±¤¿ø ( Kim Kwang-Won ) - ¿ÀÅ´½º±è±¤¿øÄ¡°ú
Â÷°æ¼® ( Cha Kyung-Suk ) - ´Ü±¹´ëÇб³ Ä¡°ú´ëÇÐ ±³Á¤Çб³½Ç

Abstract

Ä¡±Ù Èí¼ö´Â ¹é¾ÇÁú°ú »ó¾ÆÁúÀÇ ºÎºÐÀûÀÎ »ó½Ç·Î Ư¡µÇ¾îÁö´Â »óȲÀ̸ç, Ä¡±ÙÀÇ ±æÀÌ °¨¼Ò¸¦ ¾ß±âÇÏ°í Ä¡¾ÆÀÇ ±â´É¿¡ ½É°¢ÇÑ ¿µÇâÀ» ÁÙ ¼ö ÀÖ´Ù. ÀϹÝÀûÀÎ º´¸®ÀûÀÎ Ä¡±Ù Èí¼ö¿Í ±¸º°ÇÏ¿© ±³Á¤Ä¡·á¿Í °ü°èµÈ Ä¡±Ù Èí¼ö¸¦ orthodontically induced root resorption (OIRR)À̶ó°í ºÎ¸¥´Ù. À̹ø ¿¬±¸ÀÇ ¸ñÀûÀº Çѱ¹ÀÎÀ» ´ë»óÀ¸·Î ÇÏ¿© ±³Á¤ Ä¡·á ÈÄ¿¡ ³ªÅ¸³ª´Â Ä¡±Ù Èí¼ö¿Í °ü·ÃµÈ ȯÀÚ ¿äÀΰú ±³Á¤Ä¡·á ¿äÀÎÀ» ã°í, ±× ¾ç»ó¿¡ ´ëÇØ ¾Ë¾Æº¸´Â °ÍÀÌ´Ù. ÆǺ°µÉ ¿ä¼ÒµéÀº ¹ßÄ¡ Ä¡·á ¿©ºÎ, ¼ºº°, ³ªÀÌ, Ä¡±Ù÷ÀÇ º¯À§·®°ú ¹æÇâ, ÃÑ Ä¡·á ±â°£, Ä¡¾Æ ±æÀÌ, Ä¡±ÙÀÇ ÇüÅ¿´´Ù. À̹ø ¿¬±¸´Â ´Ü±¹´ëÇб³ Ä¡°ú´ëÇк´¿ø ±³Á¤°ú¿¡¼­ 2007³â 11¿ùºÎÅÍ 2008³â 12¿ù »çÀÌ¿¡ Æ÷°ýÀûÀÎ ±³Á¤Ä¡·á°¡ Á¾°áµÈ ȯÀÚÀÇ »ó¾Ç ÁßÀýÄ¡¸¦ ´ë»óÀ¸·Î ÇÏ¿´´Ù. ¼±Á¤µÈ ´ë»óÀÚ ¼ö´Â 137¸íÀ̾ú´Ù. °¢°¢ÀÇ ±â·ÏÀº Ä¡±Ù´Ü »çÁø°ú Ãø¸ð µÎºÎ ¹æ»ç¼±»çÁøÀ¸·Î ±¸¼ºµÇ¾îÁ³´Ù. Àüü ´ë»óÄ¡¾Æ¿¡ ´ëÇÑ Æò±Õ Ä¡±Ù Èí¼ö·®Àº 1.63 mm¿´À¸¸ç Ç¥ÁØÆíÂ÷´Â 1.58 mm¿´´Ù. À̺¯·®ÀûÀÎ ºñ±³¿¡¼­ ¹ßÄ¡ Ä¡·á±º¿¡¼­´Â 2.10 ¡¾ 1.64 mm, ºñ¹ßÄ¡ Ä¡·á±º¿¡¼­´Â 1.18 ¡¾ 1.39 mm·Î ³ªÅ¸³µ´Ù. ¹ßÄ¡ Ä¡·á ±º¿¡¼­ Èí¼ö·®ÀÌ 0.92 mm ÄÇÀ¸¸ç, Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Â÷À̸¦ ³ªÅ¸³Â´Ù. Ãʱâ Ä¡¾ÆÀÇ ±æÀÌ°¡ ±æ¼ö·Ï Èí¼ö·®ÀÌ ÄÇÀ¸¸ç, 4 mm ÀÌ»óÀÇ ½ÉÇÑ Ä¡±Ù Èí¼ö¸¦ º¸ÀÌ´Â ±×·ì¿¡¼­ blunt, pointed, eroded ÇüÅÂÀÇ ºñÁ¤»óÀûÀÎ Ä¡±Ù ÇüÅÂÀÇ ºñÀ²ÀÌ ³ô¾Ò´Ù. OIRR¿¡ ¿µÇâÀ» ÁÙ ¼ö ÀÖ´Â ¿ä¼Ò·Î ¹ßÄ¡ ¿©ºÎ, Ãʱâ Ä¡¾ÆÀÇ ±æÀÌ, Ä¡±ÙÀÇ ÇüÅ°¡ ÀÖ¾ú´Ù.

Objective: Orthodontically induced root resorption (OIRR) involves partial loss of cementum and dentin of teeth caused by routine orthodontic treatment. It decreases root length and influences the function of affected teeth. In this study, the treatment and patient factors causing apical root resorption in Koreans were determined. The observed factors were extraction, gender, age, displacement of root apex, total treatment period, total teeth length, and shape of the root.

Methods: The records of 137 patients treated with full, fixed edgewise appliances were obtained from the Department of Orthodontics, Dankook University Dental Hospital, from November 2007 to December 2008. Periapical radiographs of the maxillary central incisors and cephalometric radiographs of each patient were used to assess apical root resorption and type of tooth movement.

Results:The mean amount of resorption was 1.62 ¡¾ 1.58 mm. The amount of resorption in the extraction and non-extraction groups was 2.10 ¡¾ 1.64 mm and 1.18 ¡¾ 1.39 mm, respectively. The amount of root resorption increased with the total tooth length. Severe root resorption (> 4 mm) was related to abnormal root shape (blunt, pointed, or eroded).

Conclusion: The variables significantly related to OIRR were extraction, initial tooth length, and root shape.

Å°¿öµå

Ä¡±Ù Èí¼ö; ¹ßÄ¡ Ä¡·á; Ä¡±ÙÀÇ ÇüÅÂ
Root resorption; Extraction; Root shape

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