Radiographic TechniqueCâu 32 / 100
A processed periapical image shows teeth that appear stretched and longer than they actually are. What caused this error?
a.Excessive horizontal angulation
b.Excessive vertical angulation
c.Insufficient vertical angulation
d.The receptor was placed backward
Giải thích
Elongation results from insufficient vertical angulation, which projects an image longer than the actual tooth. Excessive vertical angulation causes the opposite error, foreshortening, in which teeth appear too short. Horizontal angulation errors produce overlapped contacts rather than length distortion, and a reversed receptor produces a light image with a herringbone pattern.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Which description matches the paralleling technique for intraoral radiography?
- A maxillary premolar image shows teeth that look squat and shorter than normal, with crowns and roots compressed. The most likely cause is:
- A finished radiograph has a clear, unexposed curved area along one border. What is this error called and what causes it?
- On a set of bitewings, the proximal contacts between the premolars are superimposed and cannot be read for caries. What should be corrected on the retake?
- Which vertical angulation is customarily used for a posterior bitewing exposure?
- A patient has a shallow palate and cannot tolerate a paralleling holder, so the bisecting technique is used. Where is the central ray directed?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với DANB Radiation Health & Safety (RHS) + Infection Control (ICE) Exams · Quy trình kiểm tra