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1、深覆合的矯治deepoverbitecorrection開合的矯治openbitecorrection復發(fā)與保持RelapseandRetention深覆合的矯治deepoverbitecorrection一、機制1.前牙區(qū)牙、牙槽高度發(fā)育過度Overeruptionoftheanteriorteeth2.后牙區(qū)牙、牙槽高度發(fā)育不足Lackoferuptiontionoftheposteriorteeth3.兩者皆有二、分級Ⅰ度Ⅱ度Ⅲ度三、病因1.遺傳因素2.發(fā)育因素3.咬合因素4.替牙因
2、素5.功能因素四、臨床表現五、診斷1.牙性(dentaltype)2.骨性(skeletaltype)X線頭影測量ANBS-Go/N-MePPOPMP六深覆合矯治關鍵是如何打開咬合1.前牙區(qū)牙、牙槽高度發(fā)育過度原則壓低前牙為主方法:多用途弓(utilityarch)bypassarch片斷弓segmentedarchJ鉤100g力后傾曲六、深覆合矯治2.后牙區(qū)牙、牙槽高度發(fā)育不足原則:升高后牙為主方法:a活動矯治器舌簧上附平面導板(生長期)(removablebiteplateappliances)b
3、口外弓頸支抗(cervicalheadgear)上后牙伸長c功能矯治器上、下磨牙伸長(Herbsttwinblock)六、深覆合矯治2.后牙區(qū)牙、牙槽高度發(fā)育不足非生長期輕度a固定矯治器結合Ⅱ類牽引,對上前牙壓低力應大于垂直分力整平Spee曲線b結合小平導托槽位置對前磨牙區(qū)伸長,托槽偏齦方1mm重度手術3.兩者皆有加大補償曲線,反Spee’s曲線開合的矯治openbitecorrection一、機制1.前牙區(qū)牙、牙槽高度發(fā)育不足Lackoferuptiontionoftheanteriorteeth
4、2.后牙區(qū)牙、牙槽高度發(fā)育過度Overeruptionoftheposteriorteeth3.兩者均有二、分級Ⅰ度Ⅱ度Ⅲ度三、病因口腔不良習慣牙齒萌出異常佝僂病四、臨床表現五、診斷1.牙性2.骨性X線頭影測量S-Go/N-MePPOPMP六、矯治1.生長期(1)牙性a活動矯治器舌屏、腭刺b固定矯治器垂直牽引(2)骨性矯形治療Highpullheadgear控制垂直生長,下頜向前上旋轉六、矯治2.非生長期拔牙矯治(1)牙性A.前牙區(qū)牙、牙槽高度發(fā)育不足固定矯治器垂直牽引B.后牙區(qū)牙、牙槽高度發(fā)育過度配
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