27颊侧罕见多生牙尖的CBCT诊断与鉴别诊断

The diagnosis and antidiastole on supernumerary cusp of tooth by CBCT:a case report

目的利用锥形束CT(Cone Beam Computer Tomography,CBCT)确诊27颊侧多生牙尖1例,并对其鉴别诊断、发生机制及CBCT的临床应用特点进行分析。方法本文根据口腔临床一般检查、口腔局部X线片并结合CBCT对患牙进行确诊;对多生牙尖、融合牙、双生牙、结合牙各自的特点及鉴别要点分析讨论。结果根据口腔临床一般检查、口腔局部X线片,特别是应用CBCT确诊了1例左上第2磨牙颊侧多生牙尖。结论口腔辅助检查是临床上确诊口腔颌面部疾病的必要手段。CBCT具有扫描时间短、辐射剂量小、扫描灵活、分辨率高等优点,提高了各类口腔疾病的诊疗水平。

Objective To report a case of supernumerary cusp on the bucca of left maxillary second molar diagnosed by Cone Beam Computed Tomography（CBCT）, and to analyze its genesis,diagnosis and antidiastole. The clinic application of CBCT is correspondingly discussed. Methods The supernumerary cusp was diagnosed by oral general examination, oral local X-rayand CBCT. The respective features of supernumerary cusp, fused teeth, geminated teeth and concresence of teeth, especially differential points between them were discussed. Results A case of supernumerary cusp on the bucca of the left maxillary second molar was diagnosed definitely by the combined application of oral general examination, periapical radiograph and CBCT. Conclusion Oral accessory examinations are important, sometimes even necessary in diagnosing oral-maxillofacial diseases such as supernumerary cusp. CBCT has many advantages, such as short scanning time, low ionizing radiation, and high resolution. Therefore, CBCT can improve accuracy of diagnosis, which is why it has been applied in various areas of dentistry.