| 徐子卿,汪虹虹,沈刚,陈荣敬.铸造式扩弓器治疗安氏Ⅰ类牙列拥挤的临床研究[J].口腔材料器械杂志,2013,22(2):76-80. |
| 铸造式扩弓器治疗安氏Ⅰ类牙列拥挤的临床研究 |
| Clinical effects of casting RME on correction of Angle Class I malocclusion with crowding |
| 投稿时间：2012-06-29 修订日期：2012-09-04 |
| DOI：10.11752/j.kqcl.2013.02.05 |
| 中文关键词: 铸造式扩弓器 牙列拥挤头影 测量分析 |
| 英文关键词:Casting rapid palatal expander Crowding Cephalometrics |
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| 中文摘要: |
| 目的: 探讨使用铸造式扩弓器非拔牙矫治安氏Ⅰ类错伴轻中度牙列拥挤病例的临床疗效,为临床应用提供依据。方法: 选取32例安氏Ⅰ类错畸形伴轻中度牙列拥挤病例。其中17例采用铸造式上颌扩弓配合固定矫治技术进行非拔牙正畸治疗(实验组);15例仅采取非拔牙的固定矫治(对照组)。分别在T1(正畸治疗前)、T2(正畸治疗结束)拍摄头颅侧位定位片并测量分析。结果: 头影测量分析显示两组间下颌平面角及前面高的增加无统计学差异(P>0.05)。对照组上前牙明显较扩弓组唇倾(P<0.05),下前牙唇倾量均有增加(扩弓组=4.05°,对照组=7.16°,P>0.05)。扩弓组上、下前牙突距(U1-NA和L1-NB)变化量更小(P<0.05)。两组间上颌磨牙垂直高度的变化无显著性差异。结论: 铸造式扩弓器在扩宽牙弓解除拥挤的同时,能有效地控制磨牙高度及面下1/3高度的变化。 |
| 英文摘要: |
| Objective:The purpose of this retrospective study was to evaluate clinical effects of casting rapid maxillary expander(RME) on ClassⅠmalocclusion with mild to moderate crowding. Methods:The sample consisted of 32 subjects with ClassⅠmalocclusions who were treated without fractions by fixed edgewise appliances, and were divided into 2 groups according to different treatment protocol; groupⅠcomprised 17 patients at a mean age of 13.6 years(SD, 1.6), who had casting RME during orthodontic treatment. GroupⅡcomprised 15 patients at a mean age of 13.2 years (SD, 1.1), and were treated with fixed appliances without RME. The lateral cephalome tric radio graphs were taken at T1 (pre-treatment) and T2 (post-treatment), and the cephalometric analysis was conducted to identify the dental and skeletal changes. Results: No significant differences were observed in the value of mandibular angle and that of facial height between the two groups. RME produced significantly lesserinclinationof theupper incisors. Lower incisors were proclined labially in both groups (groupⅠ=4.05°, groupⅡ=716°, P>0.O5). The values for Ul-NA and Ll-NB increased significantly in control group compared with that in RME group. There was no statistically significant defference of dental upper molar measurement (U6-MxP) between the groups. Conclusions: The casting RME might relieve crowding and create spaces via widening the dental arch, which can prevent molar extrusion and control lower facial height effectively. |
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