正畸治疗对安氏II~1错畸形患者下颌旋转与移动的影响

目的:探讨正畸治疗对安氏II1错畸形患者下颌旋转与移动的影响。方法:治疗组20例,非正畸治疗组18例。所有患者均无外科手术治疗史、无拔牙史和功能矫治治疗史。通过头颅侧位片采集患者治疗前、治疗后的头影测量数据进行分析。结果:正畸治疗可诱导安氏II1错!畸形患者的下颌垂直向生长和颏点垂直向移位增加。上颌与下颌磨牙的垂直向或向移动与下颌旋转及颏点的水平向移位无关。与对照组相比,两组之间在上颌磨牙的向移动和下颌旋转方面无显著性差异。结论:正畸治疗影响下颌的垂直向生长及颏点的垂直向移动,而对下颌旋转及上颌磨牙的向移动无明显影响。     

Validity of 2D lateral cephalometry in orthodontics: a systematic review

Lateral cephalometric radiography is commonly used as a standard tool in orthodontic assessment and treatment planning. The aim of this study was to evaluate the available scientific literature and existing evidence for the validation of using lateral cephalometric imaging for orthodontic treatment planning. The secondary objective was to determine the accuracy and reliability of this technique. We did not attempt to evaluate the value of this radiographic technique for other purposes. A literature search was performed using specific keywords on electronic databases: Ovid MEDLINE, Scopus and Web of Science. Two reviewers selected relevant articles, corresponding to predetermined inclusion criteria. The electronic search was followed by a hand search of the reference lists of relevant papers. Two reviewers assessed the level of evidence of relevant publications as high, moderate or low. Based on this, the evidence grade for diagnostic efficacy was rated as strong, moderately strong, limited or insufficient. The initial search revealed 784 articles listed in MEDLINE (Ovid), 1,034 in Scopus and 264 articles in the Web of Science. Only 17 articles met the inclusion criteria and were selected for qualitative synthesis. Results showed seven studies on the role of cephalometry in orthodontic treatment planning, eight concerning cephalometric measurements and landmark identification and two on cephalometric analysis. It is surprising that, notwithstanding the 968 articles published in peer-reviewed journals, scientific evidence on the usefulness of this radiographic technique in orthodontics is still lacking, with contradictory results. More rigorous research on a larger study population should be performed to achieve full evidence on this topic.