Graduate Student in Periodontics, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI.
Undergraduate Student, College of Language, Science, and Arts, University of Michigan, Ann Arbor, MI.
Implant Dent. 2018 Feb;27(1):10-14. doi: 10.1097/ID.0000000000000684.
Cone-beam computed tomography (CBCT) imaging can be used to visualize anatomical structures before implant placement. The aim of this study is to evaluate the impact of implant artifacts on the accuracy of measuring periimplant bone dimensions.
Nineteen implants were placed into 9 fresh, frozen cadavers. A CBCT scan was taken, the implants were removed, and a second scan was taken. Implant dimensions and periimplant bone measurements were calculated. The mean differences were compared with paired t tests. Pearson's correlation coefficients were calculated for bone thickness measurements.
No significant differences were found between the implant dimension or bone thickness measurements on each scan. Bone thickness at the implant platform and apex were significantly correlated (P < 0.001).
The presence of dental implants did not impact the accuracy of cone-beam computed tomography (CBCT) measurements of bone thickness by metallic artifacts.
锥形束 CT（CBCT）成像可用于在植入物放置前可视化解剖结构。本研究旨在评估种植体伪影对测量种植体周骨量准确性的影响。
将 19 个种植体植入 9 个新鲜冷冻的尸体中。进行 CBCT 扫描，取出种植体，然后再进行一次扫描。计算种植体尺寸和种植体周骨量的测量值。采用配对 t 检验比较均值差异。计算骨厚度测量的 Pearson 相关系数。
两次扫描的种植体尺寸和骨厚度测量值之间无显著差异。种植体平台和根尖处的骨厚度具有显著相关性（P < 0.001）。
金属伪影不会影响 CBCT 对骨厚度的测量精度。
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