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Relationship between inter-condylar width and inter-maxillary first molar width

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¿À»óõ ( Oh Sang-Chun ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
°øÇöÁØ ( Kong Hyun-Jun ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç

Abstract

¸ñÀû:º» ¿¬±¸ÀÇ ¸ñÀûÀº »ó¾Ç°ú ÇϾÇÀÇ ¿ÏÀü ¹«Ä¡¾Ç ȯÀÚ¿¡¼­ º¸Ã¶¹°·Î »ó½ÇµÈ Ä¡¿­±Ã Æø°æ Àç°ÇÀ» À§ÇÑ ±âÁØÀ» Á¦½ÃÇϱâ À§ÇÏ¿© °úµÎ°£ Æø°æ¿¡ ´ëÇÑ »ó¾Ç Á¦1´ë±¸Ä¡°£ Æø°æÀÇ »ó°ü°ü°è¸¦ Æò°¡Çϱâ À§ÇÔÀÌ´Ù.

¿¬±¸ Àç·á ¹× ¹æ¹ý: ÄܺöÇü Àü»êÈ­´ÜÃþ¿µ»ó(Cone-beam CT)À» ÃÔ¿µÇÑ È¯ÀÚ Áß, º» ¿¬±¸ÀÇ ±âÁØ¿¡ ºÎÇÕÇÏ´Â Çѱ¹ÀÎ 120¸í (³²¼º 60¸í, ¿©¼º 60¸í)À» ¼±ÅÃÇÏ¿´À¸¸ç Invivo 5.1À» ÀÌ¿ëÇØ Cone-beam CT scanÀ» ºÐ¼®ÇÏ¿´´Ù. ÃàÀÇ ¹æÇâ¼³Á¤ ÈÄ, »ó¾Ç Á¦1´ë±¸Ä¡ÀÇ ±Ù½É ÇùÃø ±³µÎÁ¤°£ °Å¸®¸¦ ÃøÁ¤ÇÏ¿´À¸¸ç, °úµÎ°£ Æø°æÀº °¢ °úµÎÀÇ Áß½ÉÁ¡À» ÁöÁ¤ÇÏ¿© ÃøÁ¤ÇÏ¿´´Ù. ¼öÁýµÈ ÀÚ·á´Â SPSS Version 20.0À¸·Î ºÐ¼®ÇÏ¿´°í, PearsonÀÇ »ó°üºÐ¼®À» ÀÌ¿ëÇÏ¿© °úµÎ°£ Æø°æ°ú »ó¾Ç Á¦1´ë±¸Ä¡°£ Æø°æÀÇ »ó°ü°ü°èÀÇ Åë°èÀû À¯ÀǼºÀ» °ËÁõÇÏ¿´´Ù.

°á°ú: Çѱ¹ÀÎÀÇ Æò±Õ °úµÎ°£ Æø°æÀº 105.9 mm¿´À¸¸ç, ³²¼ºÀÌ 108.3 mm ¿©¼ºÀÌ 103.4 mm¿´´Ù. Æò±Õ »ó¾Ç Á¦1´ë±¸Ä¡°£ Æø°æÀº 57.1 mm¿´À¸¸ç, ³²¼ºÀÌ 57.9 mm ¿©¼ºÀÌ 56.2 mm¿´´Ù. °úµÎ°£ Æø°æ°ú »ó¾Ç Á¦1´ë±¸Ä¡°£ Æø°æ¿¡ ´ëÇÑ Pearson ÀÇ »ó°üºÐ¼® °á°ú, 0.614ÀÇ Pearson »ó°ü°è¼ö·Î Åë°èÀûÀ¸·Î À¯ÀÇÇÑ ¾çÀÇ »ó°ü°ü°è¸¦ º¸¿´´Ù.

°á·Ð: °úµÎ°£ Æø°æ°ú »ó¾Ç Á¦1´ë±¸Ä¡°£ Æø°æÀº ¾çÀÇ »ó°ü°ü°è¸¦ º¸¿´À¸¸ç, Çѱ¹ÀÎÀÇ °úµÎ°£ Æø°æ°ú »ó¾Ç Á¦1´ë±¸Ä¡°£ Æø°æÀÇ Æò±Õ ºñÀ²Àº 1:0.54¸¦ º¸¿´´Ù. º» Á¦ÇÑµÈ ¿¬±¸ÀÇ °á°ú¸¦ ±Ù°Å·Î »ó¾Ç°ú ÇϾÇÀÇ ¿ÏÀü ¹«Ä¡¾Ç ȯÀÚ¿¡¼­ °úµÎ°£ Æø°æÀ» º»·¡ÀÇ »ó¾Ç Ä¡¿­±Ã Æø°æ ¼³Á¤À» À§ÇÑ °¡À̵å·Î¼­ »ç¿ëÀÌ °¡´ÉÇÒ °ÍÀÌ´Ù.

Purpose: The aim of this study was to evaluate the correlation between inter-condylar width and inter-maxillary first molar width to present the criteria for prosthetic reconstruction of dental arch width in maxillary and mandibular fully edentulous patients.

Materials and Methods: 120 Koreans (60 males and 60 females) who underwent the cone beam computerized tomography (Conebeam CT) were selected. The Cone-beam CT images were analysed using Invivo 5.1. After reorientation of axis, inter-maxillary first molar width was measured by clicking both mesio-buccal cusp tip of maxillary first molar. And inter-condylar width was measured by clicking both middle points of condyles. The collected data were analysed with SPSS Version 20.0 and statistical significance of the correlation between inter-condylar width and inter-maxillary first molar width was verified by Pearson¡¯s correlation analysis.

Results: The mean inter-condylar width of Korean was 105.9 mm, and that of male (108.3 mm) was statistically significantly wider than the female (103.4 mm). The inter-maxillary first molar width of Korean was 57.1 mm, and that of male (57.9 mm) was statistically significantly wider than the female (56.2 mm). Pearson¡¯s correlation analysis between inter-condylar width and inter-maxillary first molar width showed a Pearson correlation coefficient of 0.614 and statistically significantly positive correlation.

Conclusion: Intercondylar width and inter-maxillary first molar width showed positive correlation and the average ratio of inter-condylar with and inter-maxillary first molar width was 1:0.54. Based on the results of this limited study, inter-condylar width can be used as a guide for setting up dental arch width in fully edentulous patient.

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fully edentulous patient; inter-condylar width; dental arch width; cone-beam CT

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