MEDICINE
RADIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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maxillary =-55 degrees; mandibular = +55 degrees
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maxillary = +45 degrees; mandibular =-50 degrees
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maxillary = +40 degrees; mandibular =-35 degrees
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maxillary = +60 degrees; mandibular =-55 degrees
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Detailed explanation-1: -State the vertical angulation used for the maxillary and mandibular pediatric occlusal projections:-Maxillary= +60; between eyebrows and bridge of nose.-Mandibular=-55; centered over chin.
Detailed explanation-2: -The mandibular occlusal projection is taken when images of the floor of the mouth [sialoliths], mandibular tori, position of supernumary, roots or impacted teeth, fractures, foreign body, are required to be viewed.
Detailed explanation-3: -In the posterior maxillary occlusal technique, the patient’s occlusal plane should be parallel to the floor, and the sagittal plane should be perpendicular to the floor. A size 2 image receptor is placed in the patient’s mouth so that the long axis of the film is parallel to the floor.
Detailed explanation-4: -The maxillary lateral occlusal radiograph is made using a size 4 film/phosphor plate with the long axis parallel to the facial surfaces of the posterior teeth. The central ray (PID) is aimed with a vertical angle of +60 to +70 degrees and centered slightly inferior to the corner of the eye.