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ugg boots sale 第一双&#235

 
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PostPosted: Tue 19:18, 15 Mar 2011    Post subject: ugg boots sale 第一双&#235

第一双尖牙低位埋伏阻生矫治1例
外均为恒牙,面不松动,拍全颁曲面断层片,可见i根下垂直阻生,牙顶部与相邻面f根尖部2/5娃平齐,根部基本发育完成在牙冠枯面近中处可见2x3ram大小的阻光区。IVf颊舌侧牙槽骨均未扪及4I隆起。诊断:面滞留;低位垂直埋伏阻生;牙瘤(图1。围l治疗曹矫治经过:①拔除Ⅳl。②外科处置:在Ⅳf拔牙创底部去骨,取出牙瘤,暴露出埋伏牙的骷面。③在颊尖的舌斜面上,[link widoczny dla zalogowanych],隔湿,[link widoczny dla zalogowanych],行常规酸蚀、冲洗、吹于,用京津釉质粘合剂将舌扣(美国)粘接其上,用0.25mma不锈钢丝套在舌扣颈部,然后将两端台一起拧成麻花劲再弯成小钩。由于剖面深,为防止继发感染,用3%双氧水生理盐水交替冲洗,敷碘仿球3d后,刨面已被新生肉芽组织覆盖,只有牵引小钩暴露在外。616粘带环,粘托槽(Begg),用0.016时美国丝制成在部位有牵引圈的下颁弓丝,用轻细型橡皮囤结扎于弓丝与小拉钩阃,牵引力值90g左右,[link widoczny dla zalogowanych]。④头一十月复诊为一周一次,更换橡皮圈.力值不变;第二、三十月为三周复诊一次。牙冠暴露牙龈外,将舌扣去除.在其颊面牯Begg托槽,因间隙不足,下颁弓丝弯制垂直曲扩弓,二个月后4f排人牙弓内恢复正常(图23)。7囤2治疗中一囤3治疗后矫治效果:从牵引到排齐共用5个月的时问。新萌出4l牙髓活力与对侧相应牙齿基本一致:根尖无吸收现象;龈形态、颜色正常;原阻生部位已生长许多新骨小粱牙周间隙正常体会:①此病历病因清楚,[link widoczny dla zalogowanych],由于牙瘤阻碍4f正常萌出,而导致面低位垂直埋伏阻生及而滞留。②牯接舌扣后刨面处理,我们没有采取以往缝合来关fjj创面,而是利用机体自身修复能力而形成的封闭。自然形成封闭创面,不暴露刨面,减少感染机会,不影响矫治的进行。③4l暴露后粘接舌扣,关键在术者与护士的协作。我们的经验是在酸蚀后冲洗,[link widoczny dla zalogowanych],用气枪持续吹干至舌扣牯接并凝固为止。④施力要慎重,这与常规矫治不同。因低位阻生牙,位置较深.去骨多,在牙冠牵出牙囊后力量要适当。牵引速度与骨组织形成速度一致,否则易造成牙齿脱落的不良后果。f收稿:l9一134—271(奉文编辑:钱雯)作者单位:吉林省长春市(130011)第一汽车集目公司职工医院
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