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下颌固定舌弓调整牙弓对称性的临床初探 被引量:2

Clinical study on the adjustment of symmetry of the mandibular arch by fixed lingual arch
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摘要 目的探讨利用下颌固定舌弓作为支抗矫治下牙弓前中部不对称。方法选择正畸临床下颌牙弓不对称患者6例,借助于固定舌弓作为支抗调整下颌牙弓形态,收集调整前后石膏模型并进行模型扫描,通过Dolphin 11.0软件建立三维数字化模型后进行测量。结果 6例患者使用下颌固定舌弓平均1~3个月,下颌牙弓基本对称,矫治前后两侧下颌第二前磨牙颊尖、尖牙牙尖、侧切牙切缘中点到矢状面距离的差值明显减小,并有统计学意义(P<0.05),两侧第一恒磨牙近中颊尖到矢状面距离的差值变化不显著(P>0.05),且第一恒磨牙间宽度治疗前后差异无统计学意义(P>0.05)。结论下颌固定舌弓作为舌侧支抗可有效调整下颌牙弓前中部的不对称,帮助建立正常的咬合关系。 Objects To investigate the adjustment of the asymmetry of the anterior and middle part of the lower arch by using fixed lingual arch as anchorage. Methods 6 patients with asymmetrical mandibular arch were treated by using fixed lingual arch as anchorage,and plaster models before and after adjustment were collected,scanned and measured after the establishment of the three-dimensional digital model by Dolphin 11. 0 software. Results 6 patients were treated with mandibular fixed lingual arch for average 1 - 3months,nearly symmetry of the mandibular arch was achieved,and difference between the distance from bilateral second premolar buccal cusps,canine cusps,midpoints of lateral incisal edge to the sagittal plane significantly reduced,and there was statistical significance( P〈0.05),while the difference between the distance from bilateral mesial buccal cusp of first molar to sagittal plane was not significant,and there was no significant difference in the width of first molar( P〈0.05) before and after treatment. Conclusion The fixed lingual arch can effectively adjust the asymmetry of the anterior and middle part of the lower arch to establish a normal occlusal relationship.
出处 《口腔医学》 CAS 2017年第2期139-143,共5页 Stomatology
基金 国家自然科学基金重点项目(81571005) 江苏省口腔疾病研究重点实验室开放研究课题(JSKLOD-KF-1506) 江苏省高校优势学科建设工程(2014-37)
关键词 下颌牙弓 对称性 舌弓 支抗 三维重建 mandibular arch symmetry lingual arch anchorage three-dimensional reconstruction
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