Radiographic TechniqueCâu 52 / 100
Which head position is correct when preparing a patient for a panoramic radiograph?
a.Midsagittal plane perpendicular to the floor and Frankfort plane parallel to the floor
b.Midsagittal plane tilted 30 degrees to the right
c.Chin raised as high as the patient can comfortably hold it
d.Head turned so the patient can watch the machine rotate
Giải thích
Correct panoramic positioning centers the midsagittal plane perpendicular to the floor and keeps the Frankfort plane parallel to the floor, which places the arch within the focal trough and yields a level occlusal plane. Tilting or turning the head magnifies one side and reduces the other. A raised chin produces a flat or reverse-smile occlusal plane and distorts the anterior region.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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