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Skeletal maturation evaluation using mandibular third molar development in adolescents

Korean Journal of Orthodontics 2009³â 39±Ç 2È£ p.120 ~ 128
Á¶¼±¹Ì, ȲÃæÁÖ,
¼Ò¼Ó »ó¼¼Á¤º¸
Á¶¼±¹Ì ( Cho Sun-Mi ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ ±³Á¤°úÇб³½Ç
ȲÃæÁÖ ( Hwang Chung-Ju ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ ±³Á¤Çб³½Ç

Abstract

¼ºÀå±â ȯÀÚÀÇ ±³Á¤ Ä¡·á¿¡¼­ ¹Ù¶÷Á÷ÇÑ Ä¡·á °á°ú¸¦ ¾ò±â À§Çؼ­´Â ¼ºÀåÀ» Á¤È®ÇÏ°Ô ¿¹ÃøÇÏ´Â °ÍÀÌ Áß¿äÇÏ´Ù. ¼ºÀå °úÁ¤Àº °³Àθ¶´Ù »ó´çÇÑ Â÷À̸¦ º¸À̱⠶§¹®¿¡ ¼ºÀå Æò°¡¸¦ À§Çؼ­´Â ¿¬´ë ¿¬·ÉÀÌ ¾Æ´Ñ »ý¸®ÀûÀÎ ¿¬·ÉÀ» »ç¿ëÇØ¾ß ÇÑ´Ù. º» ¿¬±¸ÀÇ ¸ñÀûÀº »çÃá±â µ¿¾È ¹ßÀ°ÇÏ´Â ÇÏ¾Ç Á¦3´ë±¸Ä¡¿¡¼­ Ä¡¾Æ¼º¼÷µµ¸¦ ÃøÁ¤ÇÏ°í ¼ºÀå Æò°¡ ÁöÇ¥·Î¼­ÀÇ ±× °¡Ä¡¸¦ Æò°¡ÇÏ°íÀÚ ÇÏ´Â µ¥ ÀÖ´Ù. ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇк´¿ø ±³Á¤°ú¿¡ ³»¿øÇÑ ¼ºÀå±â ¿©ÀÚ È¯ÀÚ 270¸íÀ» ´ë»óÀ¸·Î Á¦3´ë±¸Ä¡ÀÇ Ä¡¾Æ ¼º¼÷µµ(Demirjian index), °æÃßÀÇ °ñ ¼º¼÷µµ(CVMI), ¼ö¿ÏºÎ °ñ ¼º¼÷µµ(SMI), ÃÊ°æ ¿¬·É µîÀ» Æò°¡ÇÏ¿© ºÐ¼®ÇÏ¿´´Ù. ¿¬±¸ °á°ú Demirjian index¿Í SMI, CVMI °£ÀÇ »ó°ü°ü°è¿¡¼­ SMI¿Í Demirjian index (r = 0.64), CVMI¿Í Demirjian index (r = 0.59)´Â Åë°èÀûÀ¸·Î À¯ÀÇÇÑ ¾çÀÇ »ó°ü°ü°è¸¦ º¸¿´´Ù (p £¼ 0.001). ±×·¯³ª ÃÊ°æ ¿¬·É°ú Demirjian index°£ÀÇ »ó°ü°ü°è(r = 0.26)´Â ³·¾ÒÀ¸¸ç (p £¼ 0.001), Demirjian index¸¦ ÅëÇØ Æò°¡ÇÑ Á¦3´ë±¸Ä¡ÀÇ Ä¡¾Æ¼º¼÷µµ´Â I, II, III±Þ ºÎÁ¤±³ÇÕ °£¿¡ Â÷ÀÌ°¡ ¾ø´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ±×¸®°í Á¦3´ë±¸Ä¡ Ä¡°üÀÌ ¿Ï¼ºµÇ°í Ä¡±ÙÀÌ Çü¼ºµÇ±â ½ÃÀÛÇÏ´Â Demirjian index E´Ü°è ÀÌ»óÀ̸é SMI 10´Ü°è, CVMI 5´Ü°è ÀÌ»ó¿¡ ¼ÓÇÏ¿´´Ù. ÇÏ¾Ç Á¦3´ë±¸Ä¡ÀÇ ¹ßÀ°´Ü°è¸¦ ÀÌ¿ëÇÑ Ä¡¾Æ¼º¼÷µµ Æò°¡´Â °æÃß ¹× ¼ö¿ÏºÎ °ñ¼º¼÷µµ¿Í Á¶ÇÕÇÏ¿© »ç¿ëÇÑ´Ù¸é »çÃá±â ¼ºÀå Æò°¡¿¡ ÀÖ¾î ÇϳªÀÇ º¸Á¶ÀûÀÎ ¼ö´ÜÀ¸·Î È°¿ëµÉ ¼ö ÀÖÀ» °ÍÀÌ´Ù.

Objective: To estimate dental maturity using the Demirjian Index for the mandibular third molar and investigate the relationships between dental maturity and skeletal maturity among growing children.

Methods: The samples were derived from panoramic, lateral cephalometric and hand-wrist radiographs of 270 female subjects registered as patients at the orthodontic department, dental hospital, Yonsei University. Dental maturity [Demirjian Index (DI)] and skeletal maturity [skeletal maturation indicators (SMIs)] and cervical vertebrae maturation indicators (CVMIs)] were estimated from these radiographs.

Results: There was a significant correlation (r = 0.64) between SMIs and DI, and a similar correlation (r = 0.59) was observed between CVMIs and DI (p £¼ 0.001). If DI was above Stage E, then the SMI was above Stage 10 and the CVMI was above Stage 5. There was a weak correlation (r = 0.26) between age at menarche and DI (p £¼ 0.001). There was no significant difference in DI among Class I, II or III malocclusions.

Conclusions: Dental maturity evaluation using the mandibular third molar will be an adjunctive tool in combination with cervical vertebrae and hand-wrist maturity evaluations.

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Growth evaluation;Maturation;Growth prediction;Growth and development

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