应用两种扫描模式和锥形束计算机断层扫描设备的最小体素大小检测种植体周开窗和骨开裂。
Detection of periimplant fenestration and dehiscence with the use of two scan modes and the smallest voxel sizes of a cone-beam computed tomography device.
机构信息
Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil.
出版信息
Oral Surg Oral Med Oral Pathol Oral Radiol. 2013 Jan;115(1):121-7. doi: 10.1016/j.oooo.2012.10.003.
OBJECTIVE
To assess the accuracy of cone-beam computed tomography (CBCT) in periimplant fenestration and dehiscence detection, and to determine the effects of 2 voxel sizes and scan modes.
STUDY DESIGN
One hundred titanium implants were placed in bovine ribs in which periimplant fenestration and dehiscence were simulated. CBCT images were acquired with the use of 3 protocols of the i-CAT NG unit: A) 0.2 mm voxel size half-scan (180°); B) 0.2 mm voxel size full-scan (360°); and C) 0.12 mm voxel size full scan (360°). Receiver operating characteristic curves and diagnostic values were obtained. The Az values were compared with the use of analysis of variance.
RESULTS
The Az value for dehiscence in protocol A was significantly lower than those of B or C (P < .01). They did not statistically differ for fenestration (P > .05).
CONCLUSIONS
Protocol B yielded the highest values. The voxel sizes did not affect fenestration and dehiscence detection, and for dehiscence full-scan performed better than half-scan.
目的
评估锥形束 CT（CBCT）在种植体周围开窗和骨开裂检测中的准确性，并确定两种体素大小和扫描模式的影响。
研究设计
将 100 个钛种植体植入牛肋骨中，模拟种植体周围开窗和骨开裂。使用 i-CAT NG 设备的 3 种方案获取 CBCT 图像：A）0.2mm 体素大小半扫描（180°）；B）0.2mm 体素大小全扫描（360°）；C）0.12mm 体素大小全扫描（360°）。获得受试者工作特征曲线和诊断值。使用方差分析比较 Az 值。
结果
方案 A 中骨开裂的 Az 值显著低于方案 B 或 C（P<.01）。对于开窗，它们之间没有统计学差异（P>.05）。
结论
方案 B 产生的结果最高。体素大小对开窗和骨开裂检测没有影响，对于骨开裂，全扫描优于半扫描。
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