口腔正畸学 X线头影测量

Airway Analysis
（六）常用软组织测量内容
（七）计算机Ｘ线头影测量
诊断
◆ 病史及检查：牙颌畸形的因素与机制 ◆ Ｘ线头影测量：牙颌颅面结构特征 ◆ 模型分析：牙弓拥挤度 ◆ 腕骨Ｘ线片分析：生长发育潜能
治疗计划与适应证
提问与解答互动时间
谢谢！
Dental relationships
The maxilla and incisors is protrusive
Retrusive mandible and incorrect treatment
Good facial balance with lips approximating the s-line
Soft-Tissue Analysis
Steiner’s S-line
Interpretation of Cephalometric Headfilms
Acceptable Compromises
Wits Appraisal
ANB as a Measure of Jaw Dysplasia
Applicaton of the Wits Appraisal
Shortcomings of ANB
Follow-up Studies on ANB Angle and Wits Measurements
Roth’s modification of the Wits appraisal to describe molar relationships
Protrusion of the maxillary incisors
The Polygon
Interpretation of Cephalometric Headfilm Tracing
A Protruive maxilla and a mildly retrusive mandible
Rotational Effect of the Jaws
The effects of 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
facial angle
Angle of Convexity
A-B plane
Mandibular plane
Mandibular plane and yaxis
Dental Pattern
Interincisal, incisalocclusal, and incisormandibular plane angle
X线头影测量
Cephalometrics
(一) X线头影测量的主要应用
研究颅面生长发育
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
A Retropositioned 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
４．面部软组织的常用测量项目
（五）常用Ｘ线头影测量分析法
Downs’ Analysis
Retrognathic facial type
Orthognathic facial type
Prognathic facial type
True prognathism
Skeletal Pattern
Anteroposterior Spatial Relationship of the jaws Relative to Nasion
A normal occlusion
The effects of short and long cranial base on the ANB anlge
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 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
(二) 头颅定位X线照相 和头影图的描绘
两侧影象不完全重合时，取平均中点
(三) 常用的测量标志点及平面
基准平面
测量平面
源自文库
(三) 常用的硬组织测量项目
１．上下颌骨的常用测量项目
２．上下牙齿的常用测量项目
３．面部高度的常用测量项目