1、 X X线头影测量线头影测量 Cephalometrics (一一) X线头影测量的主要应用线头影测量的主要应用 研究颅面生长发育研究颅面生长发育 牙颌面畸形的诊断分析与矫治设计牙颌面畸形的诊断分析与矫治设计 Incompetent lips at rest or lip strain on closure Soft-tissue profiles Jaw relationships Dental relationships The maxilla and incisors is protrusive Retrusive mandible and incorrect treatment Goo
2、d facial balance with lips approximating the s-line Convex profile caused by upper and lower incisor teeth being too protrusive “Collapsed” facial profile 研究矫治过程中及矫治后的牙研究矫治过程中及矫治后的牙 颌面形态结构的变化颌面形态结构的变化 Superimposition of Cephalometric Radiographs 外科正畸的诊断和矫治设计外科正畸的诊断和矫治设计 ( (二二) ) 头颅定位头颅定位X X线照相线照相 和头
3、影图的描绘和头影图的描绘 两侧影象不完全重合时，取平均中点两侧影象不完全重合时，取平均中点 ( (三三) ) 常用的测量标志点及平面常用的测量标志点及平面 基准平面基准平面 测量平面测量平面 ( (三三) ) 常用的硬组织测量项目常用的硬组织测量项目 上下颌骨的常用测量项目上下颌骨的常用测量项目 上下牙齿的常用测量项目上下牙齿的常用测量项目 面部高度的常用测量项目面部高度的常用测量项目 面部软组织的常用测量项目面部软组织的常用测量项目 （五）常用线头影测量分析法（五）常用线头影测量分析法 Downs Analysis Retrognathic facial type Orthognathic
4、facial type Prognathic facial type True prognathism Skeletal Pattern facial angle Angle of Convexity A-B plane Mandibular plane Mandibular plane and y- axis Dental Pattern Interincisal, incisal- occlusal, and incisor- mandibular plane angle Protrusion of the maxillary incisors The Polygon Interpreta
5、tion of Cephalometric Headfilm Tracing A Protruive maxilla and a mildly retrusive mandible A Retro- positioned maxillary base TWEED ANALYSIS Steiner Analysis The Skeletal Analysis SNA SNB ANB The Dental Analysis Upper incisor to NA Lower incisor to N-B line Soft-Tissue Analysis Steiners S-line Inter
6、pretation of Cephalometric Headfilms Acceptable Compromises Wits Appraisal ANB as a Measure of Jaw Dysplasia Anteroposterior Spatial Relationship of the jaws Relative to Nasion A normal occlusion The effects of short and long cranial base on the ANB anlge Rotational Effect of the Jaws The effects of
7、 the jaws relative to the anterior cranial base on the ANB angle Methods of Appraisal of Jaw Disharmony Dropping perpendiculars from point A and B, respectively, onto the occlusal plane Applicaton of the Wits Appraisal Shortcomings of ANB Follow-up Studies on ANB Angle and Wits Measurements Roths modification of the Wits appraisal to describe molar relationships Airway Analysis （六）常用软组织测量内容（六）常用软组织测量内容 （七）计算机线头影测量（七）计算机线头影测量 诊诊 断断 病史及检查：牙颌畸形的因素与机制病史及检查：牙颌畸形的因素与机制 线头影测量：牙颌颅面结构特征线头影测量：牙颌颅面结构特征 模型分析：牙弓拥挤度模型分析：牙弓拥挤度 腕骨线片分析：生长发育潜能腕骨线片分析：生长发育潜能 治疗计划与适应证治疗计划与适应证 提问与解答互动时间提问与解答互动时间 谢谢！
