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Effects of conventional and modified facemask therapies on dentofacial structures

Korean Journal of Orthodontics 2010³â 40±Ç 6È£ p.432 ~ 443
Yagci Ahmet, Uysal Tancan,
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 ( Yagci Ahmet ) - Erciyes University Faculty of Dentistry Department of Orthodontics
 ( Uysal Tancan ) - Erciyes University Faculty of Dentistry Department of Orthodontics

Abstract

À̹ø ¿¬±¸ÀÇ ¸ñÀûÀº ±âÁ¸ÀÇ ÆäÀ̽º ¸¶½ºÅ©¿Í º¯ÇüµÈ ÆäÀ̽º ¸¶½ºÅ©ÀÇ Ä¡¾Æ ¹× °ñ°ÝÀû È¿°ú¸¦ Æò°¡ÇÏ°íÀÚ III±Þ ºÎÁ¤±³ÇÕȯ¿¡¼­ Ä¡·á±º°ú ºñÄ¡·á±ºÀ» ºñ±³ÇÏ¿´´Ù. 24¸íÀÇ È¯ÀÚ(¿©ÀÚ: 13¸í, ³²ÀÚ: 11)·Î ±¸¼ºµÈ ±âÁ¸ÀÇ ÆäÀ̽º ¸¶½ºÅ© ±×·ì(Group 1, mean age, 9.2 ¡¾ 1.4 years)°ú 24¸íÀÇ È¯ÀÚ(¿©ÀÚ:12¸í, ³²ÀÚ: 12¸í)·Î ±¸¼ºµÈ º¯ÇüµÈ ÆäÀ̽º ¸¶½ºÅ©(Group 2,mean age, 9.3 ¡¾ 1.6 years); ±×¸®°í 21¸í(¿©ÀÚ: 11¸í, ³²ÀÚ:10¸í)À¸·Î ±¸¼ºµÈ ´ëÁ¶±º ±×·ì(Group 3, mean age, 9.8 ¡¾1.9 years)À¸·Î ºÐ·ùÇÏ¿´´Ù. ±×·ì ³» ±×·ì °£¿¡ Ä¡·á±º°ú ´ëÁ¶±ºÀ» Åë°èÇÐÀûÀ¸·Î ºÐ¼®ÇÏ¿´´Ù. ±×·ì ³» ºñ±³´Â ºñ¸ð¼öÀûÀÎ ¹æ¹ýÀÇ Wilcoxon¡¯s testÀ¸·Î ±×·ì °£ÀÇ º¯È­´Â Kruskal-
Wallis test¸¦ ÀÌ¿ëÇÏ¿© ºÐ¼®ÇÏ¿´´Ù. ÀÌÈÄ ±×·ì °£ÀÇ Åë°èÀûÀÎ À¯È¿¼º °ËÁõÀ» À§ÇÏ¿© Mann-Whitney test¿Í Bonferroni¡¯s
correctionÀ» ½ÃÇàÇÏ¿´´Ù (p £¼ 0.016). Group 1¿¡¼­ SNBº¯È­°¡ ´ëÁ¶±ºº¸´Ù Àû¾ú´Ù. SNA, ANB, SN-MP, A to N perp°ú Upper lip to E planeÀÌ Áõ°¡ÇÏ¿´´Ù. Group 2¿¡¼­´Â SNB, U1-NA (mm) U1-NA (o) and Pog to N perp (mm) º¯È­´Â ´ëÁ¶±ºº¸´Ù Àû¾ú´Ù. SNA, ANB, SN-MP, A to N perp°ú Upper lip to E planeÀÌ Áõ°¡ÇÏ¿´´Ù. º¯ÇüµÈ ÆäÀ̽º ¸¶½ºÅ©´Â »ó¾Ç ¿­¼ºÀåÀÌ ÀÖ´Â III±Þ ºÎÁ¤±³ÇÕ È¯ÀÚ¿¡°Ô È¿°úÀûÀ¸·Î »ç¿ëµÉ ¼ö ÀÖ´Ù. »ó¾Ç±Ã È®ÀåÀ» µ¿¹ÝÇÑ ÆäÀ̽º ¸¶½ºÅ©¸¦ÅëÇÏ¿© »ó¾ÇÀº ȸÀüÀ» ¾ß±â½ÃÅ°Áö ¾Ê°í Àü¹æÀ¸·Î À̵¿ÇÏ¿´À¸¸ç ¸ðµç Ä¡·á±º¿¡¼­ ÇϾÇÀº ÈÄÇϹæÀ¸·Î À̵¿ÇÏ¿´´Ù.

Objective: The purpose of this prospective study was to evaluate the dentofacial effects of conventional and modified facemask therapies with rapid maxillary expansion, in a group of Class III patients; and compared with an untreated control group.

Methods: The conventional facemask group (Group 1) comprised of 24 patients, 13 girls and 11 boys (mean age, 9.2 ¡¾ 1.4 years); the modified facemask treatment group (Group 2) comprised of 24 patients, 12 girls and 12 boys (mean age, 9.3 ¡¾ 1.6 years); and the control group (Group 3) comprised of 21 subjects, 11 girls and 10 boys (mean age, 9.8 ¡¾ 1.9 years). Treatment and control changes within the groups and the differences between the groups were analyzed statistically. Intra-group comparisons were evaluated using the non-parametric Wilcoxon¡¯s test and intergroup changes were analyzed using the Kruskal-Wallis test. The statistical significance of intergroup differences was further assessed with the Mann-Whitney test for independent samples and applying Bonferroni¡¯s correction (p £¼ 0.016).

Results: In group 1, SNB changes were less than the control. There were increases in SNA, ANB, SN-MP, A to N perp and Upper lip to E plane. In group 2, SNB, U1-NA (mm) U1-NA (o) and Pog to N perp (mm) changes were less than the control. There were increases in SNA, ANB, SN-MP, A to N perp and Upper lip to E plane.

Conslusions: Modified facemask appliance can be used effectively in Class III patients with a retrognathic maxilla. Facemask therapies with expansion resulted in an anterior advancement and translation of maxilla without rotation; and the mandible moved downward and backward in both treatment groups.

Å°¿öµå

ºÎÁ¤±³ÇÕ; Angle Class III; ±¸¿Ü °ßÀÎÀåÄ¡; ±¸°³È®ÀåÀåÄ¡; Ãø¸ðµÎºÎ¹æ»ç¼±»çÁø
Malocclusion; Angle Class III; Extraoral traction appliances; Palatal expansion technique; Cephalometry

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