ORIGINAL ARTICLE ８；６ｇＧｙｙｏｙｚｇｔｚ＆Ｖｘｕｌｋｙｙｕｘ２＆ｈＧｙｙｕｉｏｇｚｋ＆Ｖｘｕｌｋｙｙｕｘ２＆Ｊｋｖｇｘｚｓｋｔｚ＆ｕｌ＆Ｕｘｚｎｕ３ｊｕｔｚｏｉｙ２＆Ｌｇｉ｛ｒｚ｡＆ｕｌ＆Ｊｋｔｚｏｙｚｘ｡２＆Ｉ｛ｓｎ｛ｘｏ｡ｋｚ＆［ｔｏ｜ｋｘｙｏｚ｡２＆Ｙｏ｜ｇｙ２＆Ｚ｛ｘｑｋ｡４ｉＬｋｒｒｕ｝＆Ｘｋｙｋｇｘｉｎｋｘ２＆Ｇｔｑｇｘｇ＆Ｓｋ｜ｑｏ＆Ｓｏｒｏｚｇｘ｡＆Ｎｕｙｖｏｚｇｒ２＆Ｇｔｑｇｘｇ２＆Ｚ｛ｘｑｋ｡４Ｉｕｘｘｋｙｖｕｔｊｏｔｍ＆ｇ｛ｚｎｕｘ＠＆Ｇｒｏ＆Ｇｒｚ｛喇＆Ｈｏ陸ｇｑ陸ｏ４Ｊｋｖｇｘｚｓｋｔｚ＆ｕｌ＆Ｕｘｚｎｕｊｕｔｚｏｉｙ２＆Ｌｇｉ｛ｒｚ｡＆ｕｌ＆Ｊｋｔｚｏｙｚｘ｡２＆Ｉ｛ｓｎ｛ｘｏ｡ｋｚ＆［ｔｏ｜ｋｘｙｏｚ｡２＆；＞７：６＆Ｙｏ｜ｇｙ２＆Ｚ｛ｘｑｋ｡４＋６６？６＆；９８：６：７９６９Ａ＆ｋ３ｓｇｏｒ２＆ｇｒｚ｛ｍｈｏｉｇｑｉｏＦｍｓｇｏｒ４ｉｕｓ４Ｘｋｉｋｏ｜ｋｊ＆Ｌｋｈｘ｛ｇｘ｡＆８；２＆８６７６Ａ＆Ｒｇｙｚ＆Ｘｋ｜ｏｙｏｕｔ＆Ｇｖｘｏｒ＆８９２＆８６７６Ａ＆Ｇｉｉｋｖｚｋｊ＆Ｇｖｘｏｒ＆８＜２＆８６７６４ＪＵＯ＠７６４：６：７５ｑｐｕｊ４８６７６４：６４：４８；６０Ｚｎｏｙ＆ｙｚ｛ｊ｡＆｝ｇｙ＆ｙ｛ｖｖｕｘｚｋｊ＆ｈ｡＆ｚｎｋ＆Ｉ｛ｓｎ｛ｘｏ｡ｋｚ＆［ｔｏ｜ｋｘｙｏｚ｡２＆Ｌｕ｛ｔ３ｊｇｚｏｕｔ＆ｕｌ＆Ｙｉｏｋｔｚｏｌｏｉ＆Ｏｔ｜ｋｙｚｏｍｇｚｏｕｔｙ＆．Ｉ［ＨＧＶ／４Ｔｕｔｉｕｓｖｒｏｇｔｉｋ＆ｙｉｘｋ｝＆ｙ｛ｖｖｕｘｚｋｊ＆ｓｇ～ｏｒｒｇｘ｡＆ｓｕｒｇｘ＆ｊｏｙｚｇｒｏ｢ｇｚｏｕｔ＆ｏｔ＆ｇ＆ｖｇｘｇｒｒｋｒ＆ｓｇｔｔｋｘＸ｛ｎｏ＆Ｔｇｒ陸ｇｉｏ２＆ＪＪＹ２＆ＶｎＪ２ｇ＆Ｇｒｏ＆Ｇｒｚ｛喇＆Ｈｏ陸ｇｑ陸ｏ２＆ＪＪＹ２＆ＳＹ２ｈ＆Ｌｇｚｏｎ＆Ｕ｢ｇｔ２＆ＪＪＹ２＆ＶｎＪｉ Objective: Intraoral noncompliance upper molar distalization techniques have gained in popularity and have subsequently found to be successful in Class II correction. The aim of the present study was to introduce a screw supported intraoral distalization appliance and investigate its efficiency. Methods: Twenty-one sub- jects (11 females, 10 males; average age of 14.9 years) with Angle Class II malocclusion participated in this study. Two screws were inserted behind the incisive foramen and immediately loaded to distalize the upper first molars. An intraoral screw supported distalization appliance was used to distalize the upper mo- lars in order to achieve a Class I molar relationship. Skeletal and dental changes were evaluated using cephalometric and three-dimensional (3D) model analysis. Results: Upper molars were distalized 3.95 mm on average and a Class I molar relationship was achieved without any anchorage loss. The upper molars were tipped only 1.49 o and the upper right and left molars were rotated only 0.54 o and 0.74 o respectively which were statistically non-significant (p ＞ 0.05). Conclusions: The newly designed screw supported non- compliance distalization appliance was found to be an effective device for achieving bodily molar distaliza- tion without any anchorage loss. (Korean J Orthod 2010;40(4):250-259) Ｑｋ｡＆｝ｕｘｊｙ＠ Molar distalization, Three-dimensional model analysis, Skeletal anchorage INTRODUCTION ＆＆Ｉｒｇｙｙ＆ＯＯ＆ｓｇｒｕｉｉｒ｛ｙｏｕｔｙ＆ｉｇｔ＆ｈｋ＆ｋ｜ｇｒ｛ｇｚｋｊ＆ｇｙ＆ｙｑｋｒｋｚｇｒ＆ｇｔｊ＆ｊｋｔｚｇｒ＆Ｉｒｇｙｙ＆ＯＯ４＆Ｏｌ＆ｇ＆ｙｑｋｒｋｚｇｒ＆Ｉｒｇｙｙ＆ＯＯ＆ｓｇｒｕｉｉｒ｛ｙｏｕｔ＆ｏｔ｜ｕｒ｜ｋｙ＆ｇ＆ｔｕｘｓｇｒ＆ｖｕｙｏｚｏｕｔｋｊ＆ｓｇｔｊｏｈｒｋ＆ｙｇｍｏｚｇｒｒ｡２＆ｏｚ＆ｉｇｔ＆ｈｋ＆ｚｘｋｇｚｋｊ＆｝ｏｚｎ＆ｋｏｚｎｋｘ＆｛ｖｖｋｘ＆ｓｕｒｇｘ＆ｊｏｙｚｇｒｏ｢ｇｚｏｕｔ＆ｕｘ＆｛ｖ３ｖｋｘ＆ｌｏｘｙｚ＆ｕｘ＆ｙｋｉｕｔｊ＆ｖｘｋｓｕｒｇｘ＆ｋ～ｚｘｇｉｚｏｕｔｙ＆ｇｙ＆ｏｔ＆ｊｋｔｚｇｒ＆Ｉｒｇｙｙ＆ＯＯ＆ｓｇｒｕｉｉｒ｛ｙｏｕｔｙ４＆Ｚｎｋ＆ｕｘｚｎｕｊｕｔｚｏｙｚ＆ｙｎｕ｛ｒｊ＆ｉｕｔｙｏｊ３ｋｘ＆ｓｇｔ｡＆ｌｇｉｚｕｘｙ＆ｙ｛ｉｎ＆ｇｙ＆ｙｑｋｒｋｚｇｒ２＆｜ｋｘｚｏｉｇｒ＆ｇｔｊ＆ｙｇｍｏｚｚｇｒ＆ｖｘｕｖｋｘｚｏｋｙ２＆ｙｕｌｚ＆ｚｏｙｙ｛ｋ＆ｖｘｕｌｏｒｋ＆ｇｔｊ＆ｖｇｚｏｋｔｚ＆ｉｕｓｖｒｏｇｔｉｋ＆ｚｕ＆ｘｋｇｉｎ＆ｇ＆ｊｋｌｏｔｏｚｏ｜ｋ＆ｚｘｋｇｚｓｋｔｚ＆ｖｒｇｔ４＆Ｇｌｚｋｘ＆ｊｋｚｇｏｒｋｊ＆ｉｕｔｙｏｊ３ｋｘｇｚｏｕｔｙ２＆ｏｌ＆ｓｕｒｇｘｙ＆ｇｘｋ＆ｚｕ＆ｈｋ＆ｊｏｙｚｇｒｏ｢ｋｊ２＆ｓｇｔ｡＆ｓｋｚｎｕｊｙ＆ｇｘｋ＆ｇ｜ｇｏｒｇｈｒｋ＆ｚｕｊｇ｡４７３７６＆＆Ｚｎｋ＆ｓｕｙｚ＆ｉｕｔ｜ｋｔｚｏｕｔｇｒ＆ｓｋｚｎｕｊ＆ｚｕ＆ｊｏｙｚｇｒｏ｢ｋ＆ｓｕｒｇｘｙ＆ｏｙ＆ｚｕ＆｛ｙｋ＆ｉｋｘ｜ｏｉｇｒ＆ｎｋｇｊｍｋｇｘ＆｝ｎｏｉｎ＆ｉｇｔ＆ｋｏｚｎｋｘ＆ｈｋ＆｛ｙｋｊ＆ｌｕｘ＆ｕｘｚｎｕｊｕｔｚｏｉ＆ｕｘ＆ｕｘｚｎｕｖｋｊｏｉ＆ｉｕｘｘｋｉｚｏｕｔｙ４＆Ｏｚ＆ｏｙ＆ｋｇｙ｡＆ｚｕ＆ｇｖ３ｖｒ｡＆ｇｔｊ＆ｓｇ｡＆ｊｏｙｚｇｒｏ｢ｋ＆ｔｕｚ＆ｕｔｒ｡＆｛ｖｖｋｘ＆ｌｏｘｙｚ＆ｓｕｒｇｘｙ＆ｈ｛ｚ＆ｇｒｙｕ＆ｌｏｘｙｚ＆ｇｔｊ＆ｙｋｉｕｔｊ＆ｖｘｋｓｕｒｇｘｙ＆｜ｏｇ＆ｚｘｇｔｙｋｖｚｇｒ＆ｌｏｈｋｘｙ４＆Ｎｕ｝ｋ｜ｋｘ２＆ｒｇｉｑ＆ｕｌ＆ｖｇｚｏｋｔｚ＆ｉｕｕｖｋｘｇｚｏｕｔ＆ｏｙ＆ｚｎｋ＆ｓｇｐｕｘ＆ｊｏｙ３ｇｊ｜ｇｔｚｇｍｋ＆ｕｌ＆ｋ～ｚｘｇｕｘｇｒ＆ｚｘｇｉｚｏｕｔ２７７２７８＆｝ｎｏｉｎ＆ｊｏｘｋｉｚｋｊ＆ｘｋ３ｙｋｇｘｉｎｋｘｙ＆ｚｕ＆ｏｔ｜ｋｙｚｏｍｇｚｋ＆ｇｒｚｋｘｔｇｚｏ｜ｋ＆ｔｕｔｉｕｓｖｒｏｇｔｉｋ＆ｊｏｙ３ｚｇｒｏ｢ｇｚｏｕｔ＆ｓｋｚｎｕｊｙ４＆Ｕ｜ｋｘ＆ｘｋｉｋｔｚ＆｡ｋｇｘｙ２＆ｓｇｔ｡＆ｙｚ｛ｊｏｋｙ＆ｋ～３ｇｓｏｔｋｊ＆ｇｖｖｒｏｇｔｉｋｙ＆｝ｎｏｉｎ＆ｘｋｗ｛ｏｘｋ＆ｓｏｔｏｓｇｒ＆ｖｇｚｏｋｔｚ＆ｉｕｓ３ｖｒｏｇｔｉｋ＆ｙ｛ｉｎ＆ｇｙ＆ＴｏＺｏ＆ｉｕｏｒ＆ｙｖｘｏｔｍｙ２７９＆］ｏｒｙｕｔ＆ｇｘｉｎｋｙ２７：＆ｖｋｔｊ｛ｒ｛ｓ２；２７６２７；３７＞＆Ｐｕｔｋｙ３ｐｏｍ２９２７？２８６＆ｊｏｙｚｇｒ＆ｐｋｚ＞２８７２８８＆ｕｘ＆Ｑｋｒｋｙ＆ｙｒｏｊｋｘ４８９２８：＆Ｎｕ｝ｋ｜ｋｘ２＆ｇｒｒ＆ｚｎｋｙｋ＆ｏｔｚｘｇｕｘｇｒ＆ｊｏｙｚｇｒｏ｢ｇｚｏｕｔ＆ｇｖ３ｖｒｏｇｔｉｋｙ＆ｉｇ｛ｙｋ＆＆ｖｘｕｚｘ｛ｙｏｕｔ＆ｕｌ＆｛ｖｖｋｘ＆ｏｔｉｏｙｕｘｙ＆｝ｎｏｉｎ＆ｘｋ３