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Quantitative evaluation and affecting factors of post-treatment relapse tendency

Korean Journal of Orthodontics 2011³â 41±Ç 3È£ p.154 ~ 163
¼Õ¿ì¼º, Â÷°æ¼®, Á¤µ¿È­, ±èÅ¿ì,
¼Ò¼Ó »ó¼¼Á¤º¸
¼Õ¿ì¼º ( Son Woo-Sung ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°ú±³Á¤Çб³½Ç
Â÷°æ¼® ( Cha Kyung-Suk ) - ´Ü±¹´ëÇб³ Ä¡°ú´ëÇÐ ±³Á¤Çб³½Ç
Á¤µ¿È­ ( Jung Dong-Hwa ) - ´Ü±¹´ëÇб³ Ä¡°ú´ëÇÐ ±³Á¤Çб³½Ç
±èÅ¿ì ( Kim Tae-Woo ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°ú±³Á¤Çб³½Ç

Abstract

º» ¿¬±¸´Â ±³ÇÕ »óŸ¦ °´°üÀûÀÌ°í Á¤·®ÀûÀ¸·Î Æò°¡Çϱâ À§ÇØ °³¹ßµÈ American Board of Orthodontics objective grading system (ABO-OGS)À» ÀÌ¿ëÇÏ¿© ±³Á¤Ä¡·á ÈÄ ³ªÅ¸³ª´Â Àç¹ß °æÇâÀ» Æò°¡ÇÏ°í ÀÌ¿¡ ¿µÇâÀ» ÁÙ ¼ö ÀÖ´Â ¿ä¼Òµé°úÀÇ »ó°ü°ü°è¸¦ ¾Ë¾Æº¸°íÀÚ ½ÃÇàµÇ¾ú´Ù. ºÎ»ê´ëÇб³, °æÈñ´ëÇб³¿Í ´Ü±¹´ëÇб³ Ä¡°úº´¿ø ±³Á¤°ú¿¡¼­ Æ÷°ýÀû ±³Á¤Ä¡·á¸¦ ¹ÞÀº ȯÀÚ Áß Ä¡·áÁ¾·á ÈÄ 2³â ÀÌ»óÀÇ À¯Áö±â°£À» °®´Â 80¸íÀÇ È¯ÀÚ¸¦ ´ë»óÀ¸·Î ÃÊÁø ½Ã(T1)ÀÇ peer assessment rating (PAR) index, Ä¡·á ÈÄ(T2)¿Í À¯Áö ÈÄ(T3) ½Ã±âÀÇ ABO-OGS¸¦ ÃøÁ¤ÇÏ¿© T2¿Í T3 °£ÀÇ º¯È­ ¾ç»óÀ» °¢ Ç׸ñº°·Î ÃøÁ¤ÇÏ¿´°í, ³ªÀÌ, ¼ºº°, Angle ºÐ·ù, ¹ßÄ¡ ¿©ºÎ, À¯Áö±â°£, ÃÊÁø ½ÃÀÇ »óÅ¿ÍÀÇ »ó°ü°ü°è¸¦ Á¶»çÇϱâ À§ÇØ ´ÙÁß È¸±ÍºÐ¼®À» ½ÃÇàÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù. T2 ½Ã±â¿Í ºñ±³ÇÏ¿© T3 ½Ã±â¿¡ ABO-OGSÀÇ 7°³ Ç׸ñ Áß Ä¡¾Æ ¹è¿­(alignment)Àº ¾ÇÈ­µÇ¾úÀ¸¸ç, ±³ÇÕ Á¢ÃË(occlusal contact)°ú Ä¡°£ ÇÑÃË(interproximal contact)Àº °³¼±µÇ¾ú°í, ³ª¸ÓÁö 4°³ÀÇ Ç׸ñ¿¡¼­´Â À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù. ´ÙÁß È¸±ÍºÐ¼®À» ½ÃÇàÇÑ °á°ú, À¯ÀÇÇÑ È¸±Í¸ðÇüÀº Ä¡¾Æ ¹è¿­(alignment), ±³ÇÕ °ü°è(occlusal relationship), ¼öÆòÇÇ°³(overjet), Ä¡°£ Á¢ÃË(interproximal contact) Ç׸ñÀ̾úÀ¸³ª, ȸ±Í¸ðÇüµéÀÇ ¼³¸í·ÂÀÌ ³·¾ÒÀ¸¸ç, ¿¬·É, ¼ºº°, Angle ºÐ·ù, ¹ßÄ¡ ¿©ºÎ, À¯Áö±â°£, ÃÊÁø½ÃÀÇ »óÅÂ(initial PAR index, T1)´Â T2 ½Ã±â¿Í T3 ½Ã±âÀÇ ABO-OGS º¯È­·®À» ¼³¸íÇÏ´Â µ¥ Å« ¿µÇâÀ» ¹ÌÄ¡Áö´Â ¾Ê´Â °ÍÀ¸·Î º¸ÀδÙ.

Objective: The purpose of this study was to quantitatively evaluate relapse tendency after orthodontic treatment and determine the contributing factors by using the American Board of Orthodontics objective grading system (ABO-OGS).

Methods:The subjects were 80 patients with more than 2 years of retention period after completing orthodontic treatment at the dental hospitals of Busan University, Kyunghee University, and Dankook University. The posttreatment (T2) and post-retention (T3) ABO-OGS measurements were analyzed in relation to age, gender, Angle¡¯s classification, extraction, retention period, and pretreatment condition (initial peer assessment rating (PAR) index, T1) by multiple regression analysis.

Results: Among the 7 ABO-OGS criteria, alignment worsened but occlusal contact and interproximal contact improved in T3, but not in T2 (p £¼ 0.01). The 4 other criteria showed no significant differences. Multiple regression analysis showed that alignment, occlusal relationship, overjet, and interproximal contact were significant linear models, but with a low explanation power. Age, gender, Angle¡¯s classification, extraction, retention period, and pretreatment condition (initial PAR index, T1) had little influence on the ABO-OGS changes between T3 and T2.

Conclusions: An orthodontist¡¯s understanding of posttreatment relapse tendency can be useful in diagnosis and during patient consultation.

Å°¿öµå

Àç¹ß; PAR index; ABO-OGS; ±³ÇÕ Áö¼ö
Relapse; PAR index; ABO-OGS; Occlusal index

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