摘要
目的:评估改良斜面导板在前导下颌中的作用。方法:选择12例Ⅱ类Ⅱ分类伴下颌后缩患者,设为第1组,男4例,女8例,平均年龄11岁8个月。先采用上颌固定矫治器纠正上前牙内倾,再采用改良上颌斜面导板前导下颌;同时选择12例Ⅱ类Ⅰ分类伴下颌后缩患者,设为第2组,男5例,女7例,平均年龄11岁6个月,采用Twin-block前导下颌;对2组患者前导下颌的疗效通过治疗前后头颅侧位定位片进行评估、对比,采用SAS6.0软件包对数据进行统计学处理。结果:2组患者下颌均向前生长,第1组下前牙唇向倾斜较第2组明显,但差异无统计学意义(P>0.05);下颌第一磨牙近中向及向的移动,第2组显著大于第1组,差异有统计学意义(P<0.05)。结论:矫治Ⅱ类Ⅱ分类伴下颌后缩的患者,采用改良上颌斜面导板前导下颌不失为一种经济、简化、有效的方法。
PURPOSE: The aim of this study was to evaluate the effects resulted by modified maxillary oblique plate in advancing mandible. METHODS: Twelve Class Ⅱ division Ⅱ cases (4 males, 8 females) with mandibular retrusion were selected as group 1 aligned by fixed appliances in the upper arches, and their mandibles were advanced by the modified maxillary oblique plates. Meanwhile, twelve Class Ⅱ division Ⅰ cases (5 males, 7 females) with mandibular retrusion were selected as group 2 treated with the Twin-block. The average age was 11 years 8 months in group I, and 11 years 6 months in group 2. The effects of advancing mandible were compared between the two groups by analyzing cephalometric films before and after treatment with SAS6.0 software package. RESULTS: Mandibular advancement was achieved in the two groups. Mandibular anterior teeth labial tipping was more obvious in group 1 than in group 2, but without significant those (P〉0.05). Both mesial and occlusal movements of the lower first molar in group 2 were more significant than those in group 1 (P〈0.05). CONCLUSIONS: Based on the results, the modified maxillary oblique plate is an excellent appliance for the advancing mandible in Class Ⅱ division Ⅱ cases with the advantages of economics, simplification and effectiveness.
出处
《上海口腔医学》
CAS
CSCD
2010年第1期1-5,共5页
Shanghai Journal of Stomatology
基金
上海市科学技术委员会资助项目(08DZ2271100)~~