远移下颌磨牙矫治反牙合伴下颌偏斜1例

2017-12-21 佚名 实用口腔医学杂志

患者,谢某,女,18岁。

【一般资料】

患者,谢某,女,18岁。

【主诉】

牙齿不齐,要求矫治。

【家族史】

家族中无类似错牙合情况,全身状况良好。

【体格检查】

正面观唇闭合良好,面下1/3略长,下颌右偏,侧貌略显凹陷。恒牙牙合,653212反牙合,右侧磨牙及尖牙远中尖对尖关系,左侧磨牙及尖牙完全近中关系。上牙弓拥挤度4.5mm,上中线左偏0.5mm,下中线右偏6mm,下前牙代偿性舌倾。牙周组织健康,颞下颌关节检查见张口末关节弹响,开口型为“关节区无压痛(图1)。



【辅助检查】

曲面断层片显示:8888牙胚存在,8近中低位阻生。头影测量分析结果显示:III类骨面型,均角(表1)。



【初步诊断

安氏III类、骨性III类、下颌偏斜。

【治疗】

排齐整平上下牙列,建立正常的前牙覆牙合、覆盖关系。改善下颌偏斜,建立磨牙、尖牙中性关系,调正中线。1.5矫治设计拔除88,采用MBT矫治技术,上颌适当扩弓,排齐牙列;下颌左侧利用种植体支抗推磨牙远移,调整中线及咬合关系;颌间牵引纠正偏斜;精细调整牙位及尖窝关系。并告知患者颏部偏斜可以改善,但可能不完全解决。择期拔除88。1.6矫治过程上颌利用序列镍钛直丝进行扩弓,解除拥挤,下颌利用序列镍钛圆丝排齐整平牙列;@间植入种植钉利用0.43mmx0.64mm不锈钢方丝片段弓推磨牙远移(图2),依次远移下颌牙齿。术中配合m类短牵引和斜牵调整咬合关系及中线。患者满意后,拆除矫治器,上颌Hawley保持器和压膜保持器,下颌舌侧丝保持器。总疗程29个月,矫治结束后尖牙、磨牙呈中性关系,上下牙列排齐,前牙覆牙合覆盖正常,上下中线正,牙弓形态、面型及下颌偏斜得到改善(图3),保持1年后疗效稳定(图4),头影测量重叠图见图5~6。










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    2018-07-30 xlysu
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