1、 Oral&Maxillofacial Radiology(Imaging)Dento-Maxillofacial Radiology Dental Radiology I.Intraoral Radiographic Examination 1.Periapical projections 2.Bitewing projections 3.Occlusal projectionsIntraoral Radiographic ExaminationBitewing filmBitewing filmPeriapical filmPeriapical filmOcclusal filmOcclu
2、sal film Central X ray：The straight line passing through the center of the source and the center of the final beam-limiting diaphragm.150当牙排列不齐、颌骨畸形、口腔内有肿物等，必须作出调整。如无牙颌骨、腭部低平、口底浅，？lX线中心线l倾斜角度 l垂直角度l水平角度lX线中心线体表位置准确性准确性失真失真胶片放置：使用持片夹，与被照牙长轴平行，尽可能远离被照牙。胶片放置：使用持片夹，与被照牙长轴平行，尽可能远离被照牙。可以最佳显示被照牙和牙周组织的真实可以最
3、佳显示被照牙和牙周组织的真实X线影像线影像X线发生器（球管）尽可能远离被检查牙，使用长遮线筒，持片夹口线发生器（球管）尽可能远离被检查牙，使用长遮线筒，持片夹口外定位圈。外定位圈。The paralleling technique(also called the right-angle or long cone technique)is the preferred method for making intraoral radiographs.lThis procedure minimizes image distortion and best incorporates the imaging
4、 principles.lFilm holders should be used to support the film in the patients mouth.原理上？原理上？具体操作上？具体操作上？临床应用上？临床应用上？cervical burnoutMaxilla:Maxilla:Maxilla:Maxilla:Maxilla:Maxilla:Maxilla:Maxilla:Maxilla:Mandible:Mandible:Mandible:Mandible:Mandible:Mandible:根尖片投照埋伏牙定位的方法称为球管水平转动法（tube shift technique），也称为buccal object rule and Clarks rule（Clark described it in 1910）用一句英文每一单字的首字母的缩写来记住埋伏牙定位的判断。SLOB：Same Lingual,Opposite Buccal。
