Oral and Maxillofacial Surgery Department, Faculty of Dentistry, Mansoura University, 60 Elgomhoria Street, Mansoura, 35516, Egypt.
Conservative Dentistry Department, Faculty of Dentistry, Zagazig University, Zagazig, Egypt.
Int J Implant Dent. 2021 Apr 2;7(1):33. doi: 10.1186/s40729-021-00307-0.
Foreign bodies may be a cause of concern in dental implant failure.
The aim of the present study was to assess the occurrence and to evaluate the types of radiopacities in dental extraction sites using cone beam computed tomography (CBCT).
The incidence, location, and types of radiopacities were evaluated in 180 CBCT scans.
Different radiopaque structures could be noted in 84 scans. Foreign bodies and remaining roots were frequently seen. Most of the radiopacities were attributed to remaining endodontic filling in upper and lower jaws in 25 scans in different locations. Remaining roots could be detected in 20 scans. Focal and diffuse radiopaque bony lesions were observed in 16 scans. Tissue response in the form of radiolucency could be seen more with endodontic foreign bodies. Tissue reactions to radiopaque filling remnants were seen in 6.11% of cases.
Foreign body remnants, mostly of endodontic fillings, were frequently seen in CBCT in upper and lower jaws. Evidence of tissue reactions to extraction remnants could be found. Endodontic filling remnants could be seen more in the upper jaw. Thorough examination of implant site for the presence of endodontic foreign body remnants should be stressed. Debridement of the extraction socket should be done carefully in endodontically treated teeth.
异物可能是导致牙种植体失败的一个原因。
本研究旨在通过锥形束 CT（CBCT）评估拔牙部位的放射性不透射线体的发生和类型。
对 180 例 CBCT 扫描的发生率、位置和类型进行了评估。
在 84 个扫描中可以观察到不同的不透射线结构。经常可见异物和残根。在不同部位的 25 个扫描中，大多数放射性不透射线体归因于上颌和下颌的残留牙髓填充物。在 20 个扫描中可以检测到残留的牙根。在 16 个扫描中观察到局灶性和弥漫性放射性不透射线骨病变。在有牙髓异物的情况下，更常见到以射线透明为特征的组织反应。在 6.11%的病例中观察到对放射性不透射线填充物残余的组织反应。
在上颌和下颌的 CBCT 中经常可以看到异物残体，主要是牙髓填充物。可以发现对拔牙残体的组织反应的证据。在上颌中可以看到更多的牙髓填充物残余。应该强调在种植体部位彻底检查是否存在牙髓异物残体。对于接受过牙髓治疗的牙齿，应仔细清创拔牙窝。
