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What determines dental protrusion or crowding while both malocclusions are caused by large tooth size?

Korean Journal of Orthodontics 2009³â 39±Ç 5È£ p.330 ~ 336
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¼Ò¼Ó »ó¼¼Á¤º¸
¼±¹Î±Ô ( Sun Min-Kyu ) - Àü³²´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç
Á¶ÁøÇü ( Cho Jin-Hyoung ) - Àü³²´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡ÀÇÇבּ¸¼Ò
ȲÇý³² ( Hwang Hye-Nam ) - Àü³²´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡ÀÇÇבּ¸¼Ò
±èÀçÇü ( Kim Jae-Hyung ) - Àü³²´ëÇб³ Ä¡°ú´ëÇÐ ±¸°­»ý¸®Çб³½Ç
±èÁ¤¹® ( Kim Jeong-Moon ) - Çѱ¹¼ºÀα³ÇÕ¿¬±¸¼Ò

Abstract

Ä¡¾ÆÅ©±â°¡ Àü¹ÝÀûÀ¸·Î Ŭ ¶§ ¾î¶² ȯÀÚ¿¡¼­´Â Àüµ¹ÀÌ ³ªÅ¸³ª´Â ¹Ý¸é, ¾î¶² ȯÀÚ¿¡¼­´Â Ä¡¾Æ¹ÐÁý Çö»óÀÌ ³ªÅ¸³­´Ù. º» ¿¬±¸´Â Ä¡¾ÆÀüµ¹ÀÚ¿Í Ä¡¾Æ¹ÐÁýÀÚ °£ÀÇ Ãø¸ðµÎºÎ¹æ»ç¼±±Ô°Ý»çÁø»óÀÇ Æ¯Â¡À» ºñ±³ÇÔÀ¸·Î½á Ä¡¾ÆÀüµ¹ ¶Ç´Â Ä¡¾Æ¹ÐÁý ¹ß»ý ¿øÀÎÀ» ±Ô¸íÇϱâ À§ÇÏ¿© ½ÃÇàµÇ¾ú´Ù. Ä¡¾ÆÅ©±â°¡ Á¤»ó¿¡ ºñÇÏ¿© Å©¸é¼­ Á¦1±Þ ±¸Ä¡°ü°è¸¦ °¡Áö´Â Ä¡¾ÆÀüµ¹ÀÚ 29¸í, Ä¡¾Æ¹ÐÁýÀÚ 22¸íÀ» ¼±Á¤ÇÑ ÈÄ ÁßÀýÄ¡ºÎÅÍ Á¦1´ë±¸Ä¡±îÁö Ä¡¾ÆÅ©±â¸¦ ºñ±³ÇÏ´Â ÇÑÆí, Ãø¸ðµÎºÎ¹æ»ç¼±±Ô°Ý»çÁø¿¡¼­ Åõ»çµµ¸¦ ÀÛ¼ºÇÏ°í °ñ°ÝÇüÅÂ, ¼³°ñ ¹× ÀýÄ¡ À§Ä¡¸¦ ³ªÅ¸³»´Â ¿©·¯ °¡Áö °èÃøÄ¡¸¦ ¼³Á¤ÇÏ°í Ä¡¾ÆÀüµ¹ÀÚ¿Í Ä¡¾Æ¹ÐÁýÀÚ ¾ç ±º °£ÀÇ ºñ±³ºÐ¼®À» ½ÃÇàÇÏ¿´´Ù. ¿¬±¸ °á°ú º» ¿¬±¸¿¡¼­ ¼±Á¤µÈ Ä¡¾ÆÀüµ¹ÀÚ¿Í Ä¡¾Æ¹ÐÁýÀÚÀÇ Ä¡¾ÆÅ©±â´Â ¾ç ±º °£¿¡ À¯ÀÇÇÑ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾ÒÀ¸¸ç, °ñ°ÝÇüŸ¦ ³ªÅ¸³»´Â °èÃøÇ׸ñ Áß S-N, A¡¯-Ptm¡¯, SNA, ANB, ±×¸®°í facial convexity¿¡¼­ Ä¡¾ÆÀüµ¹ÀÚ°¡ Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Å« °ªÀ» º¸¿´´Ù. ¶ÇÇÑ ¼³°ñÀÇ ¼öÁ÷À§Ä¡¸¦ ³ªÅ¸³»´Â hy-PP¿Í hy-MP´Â Ä¡¾ÆÀüµ¹ÀÚ¿¡¼­ Åë°èÀûÀ¸·Î ´õ ÀÛ°Ô, ¼³°ñÀÇ ÀüÈĹæ À§Ä¡¸¦ ³ªÅ¸³»´Â hy¡¯-Go´Â Ä¡¾ÆÀüµ¹ÀÚ¿¡¼­ Åë°èÀûÀ¸·Î ´õ Å©°Ô ³ªÅ¸³µ´Ù. ÀÌ»óÀÇ °á°ú´Â Ä¡¾ÆÀüµ¹ÀÚ°¡ Ä¡¾Æ¹ÐÁýÀÚ¿¡ ºñÇØ °ñ°ÝÀûÀ¸·Î´Â »ó¾ÇÀüµ¹ °æÇâÀ» º¸ÀÌ°í ¼³°ñÀÇ À§Ä¡´Â Àü¹æ ¶Ç´Â Àü»ó¹æ¿¡ À§Ä¡ÇÏ°í ÀÖ¾î ÀÌ·¯ÇÑ Â÷ÀÌ°¡ Ä¡¾ÆÀüµ¹ ¶Ç´Â Ä¡¾Æ¹ÐÁý °áÁ¤°ú °ü·ÃÀÌ ÀÖÀ½À» ½Ã»çÇÏ¿´´Ù.

Objective: To examine the differences in lateral cephalometric characteristics between patients with dental protrusion and crowding in order to determine what factors affect dental protrusion or crowding while both malocclusion types are caused by large tooth size.

Methods: Twenty nine individuals with dental protrusion and 22 individuals with dental crowding were enrolled in this study. All subjects had larger teeth than average and Class I molar relationships. Craniofacial characteristics and hyoid bone positions were determined from lateral cephalograms and compared between the two groups.

Results: In the comparisons of craniofacial characteristics, the measurements indicating maxillary length and facial convexity showed greater values in the protrusion group than in the crowding group. Comparisons of hyoid bone positions showed that the hyoid bone was positioned more anteriorly and superiorly in the protrusion group than in the crowding group.

Conclusions: The results of the present study indicate that some craniofacial characteristics and tongue position may affect the development of dental protrusion or crowding; when an individual has large teeth, dental protrusion or crowding might be determined according to maxillary growth and tongue position.

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Dental protrusion;Dental crowding;Cephalometric characteristics;Tooth size

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