高角和低角病例的诊断、临床特征及正畸治疗特点ppt参考课件.ppt

高角和低角病例的诊断、临床特征及正畸治疗特点High angle and low angle cases, diagnosis, clinical features and orthodontic treatment * 由于以往的诊断是以安氏分类为主, 正畸医生常常只注意到矢状向错牙合而忽略了垂直向不调。 近年来, 学者们逐渐认识到垂直面型在错畸形诊断和治疗中的重要性: 它不仅为颅面复合体的生长方向提供了线索, 而且直接影响治疗的成功与否。 Previous diagnosis was based on Angles classification so orthodontists often only noticed the sagittal malocclusion while ignoring the vertical dimension. In recent years, scholars have come to realize the importance of the vertical dimensions in the diagnosis and treatment of malocclusion it not only provides clues to the direction of growth of the craniofacial complex, but also directly affects the success of treatment. * 垂直向异常有高角和低角两种类型, 在Ⅲ类安氏错牙合中约有50%左右的患者存在不同程度的垂直向异常。 Vertical anomaly are of two types?of?high-angle and?low?angle,?about?50%of?patients with angle class III malocclusion have?varying degrees of abnormal?vertical dimension high-angle?and?low?angle cases,?diagnosis, clinical features,?and orthodontic treatment * 一、高角病例和低角病例的诊断和形成机制High angle and low angle cases diagnosis and form 文献中用来描述垂直向异常的说法很多,常用的有开张面型( hyperdivergent ) 、向后旋转型( backward rotation ) 、垂直生长型(vertical type) 、长面型( dolichocephalic ) 、高角型( high -angle face ) , 均指垂直向异常以发育过度( vertical excessive ) 为主, 而聚合面型( hypodivergent ) 、向前旋转型( forward rotation) 、水平生长型( horizontal type) 、短面型( brachypechalic) 、低角型( low -angle face) 则是指垂直发育不足( vertical deficiency ) 。 由于诊断标准和侧重点不同, 从严格意义上讲, 这些概念之间是有差异的, 但在临床中描述垂直面型时经常通用。Diagnostic criteria and a different focus, in the strict sense, these concepts there is a difference, but often common in the clinical description of vertical type. * 高角病例和低角病例的诊断和形成机制High angle and low angle cases diagnosis and form 本文中统称为高角和低角, 但不能误解为下颌平面角大者即为高角型、小者即为低角型, 这是因为下颌角和下颌下缘在生长改建过程中变化较大, 所以单纯以下颌平面角作为诊断标准可能掩盖了下颌真实的旋转方向,对垂直面型的正确诊断还应结合其他指标。 Referred to article as?high-angle?and low?angle, should not be confuse with the mandibular?plane angle, if it is high, called?high angle case, and if small than low angle case. Because?the mand