Lloyd S, Talati V R, Ward J P
North Derbyshire Royal Hospital, Calow, Chesterfield.
Br Dent J. 1994 Feb 19;176(4):144-6. doi: 10.1038/sj.bdj.4808391.
Radio-opaque foreign bodies are commonly seen in dental pan-oral tomographs. A case is described of the presentation of a patient with a signet ring lodged in the left nasal cavity discovered by routine pan-oral tomography in dental practice, and of its subsequent removal by an otorhinolaryngologist.
在牙科全景口腔断层扫描中常见不透射线的异物。本文描述了一例患者的情况，该患者通过牙科诊所的常规全景口腔断层扫描发现一枚戒指卡在左鼻腔，随后由耳鼻喉科医生将其取出。
