X线头影测量PPT.ppt

Roth’s modification of the Wits appraisal to describe molar relationships Airway Analysis 谢谢！ Soft-Tissue Analysis Steiner’s S-line Interpretation 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 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 Orthognathic 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 Interpretation of Cephalometric Headfilm Tracing A Protruive maxilla and a mildly retrusive mandible A Retro-positioned maxillary base Steiner Analysis The Skeletal Analysis SNA SNB ANB The Dental Analysis Upper incisor to NA Lower incisor to N-B line Downs’ Analysis Retrognathic facial type X线头影测量 X线头影测量 Cephalometrics X线头影测量的主要应用 研究颅面生长发育 Incompetent lips at rest or lip strain on closure Soft-tissue profiles Jaw relationships Dental relationships The maxilla and incisors is protrusive Protrusive mandible and incorrect treatment Good 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颌面形态结构的变化 * *