Tarce Mihai, de Greef Alexander, Lahoud Pierre, de Faria Vasconcelos Karla, Jacobs Reinhilde, Quirynen Marc
Department of Oral Health Sciences, KU Leuven & Dentistry (Periodontology), University Hospitals Leuven, Leuven, Belgium.
OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University Hospitals Leuven, Leuven, Belgium.
Clin Oral Implants Res. 2022 Dec;33(12):1199-1211. doi: 10.1111/clr.14002. Epub 2022 Oct 12.
To assess, in vitro, variables potentially influencing implant blooming using a human-like imaging phantom and 3D-printed mandibles.
Sixty implants were inserted in 3D-printed mandibles in 26 different configurations in order to examine the impact of implant diameter, presence of a cover screw, implant design/material, implant position, and the presence of additional implants on implant blooming using two cone-beam computed tomography (CBCT) devices (Accuitomo [ACC] and NewTom [NWT]). Two observers measured the amount of implant blooming in both buccolingual and mesiodistal directions. Inter-rater agreement and descriptive statistics, grouped by implant characteristic and CBCT device, were calculated.
Both CBCT devices increased implant diameter (a mean increase of 9.2% and 11.8% for titanium, 20.3% and 24.4% for zirconium, for ACC and NWT, respectively). An increase in implant diameter did not increase the amount of blooming, whereas placing a cover screw did (from 8.0% to 10.9% for ACC, and from 10.0% to 15.6% for NWT). Moreover, implant design, anatomical region, and the presence of another implant also affected the extent of the blooming.
Dental implants show a clear diameter increase on CBCT, with the effect being more pronounced for zirconium than for titanium implants. Similar effects are likely to occur in the clinical setting, potentially masking nonosseointegration, reducing the dimensions of peri-implant defects, and/or causing underestimation of the buccal bone thickness.
使用类人成像体模和3D打印下颌骨，在体外评估可能影响种植体影像放大的变量。
将60颗种植体以26种不同配置植入3D打印下颌骨中，以便使用两台锥形束计算机断层扫描（CBCT）设备（Accuitomo [ACC]和NewTom [NWT]）研究种植体直径、覆盖螺丝的存在、种植体设计/材料、种植体位置以及其他种植体的存在对种植体影像放大的影响。两名观察者测量了种植体在颊舌向和近远中向的影像放大量。计算了观察者间的一致性以及按种植体特征和CBCT设备分组的描述性统计数据。
两台CBCT设备均使种植体直径增加（ACC和NWT设备中，钛种植体平均分别增加9.2%和11.8%，锆种植体平均分别增加20.3%和24.4%）。种植体直径增加并未增加影像放大量，而放置覆盖螺丝则会增加（ACC设备中从8.0%增至10.9%，NWT设备中从10.0%增至15.6%）。此外，种植体设计、解剖区域以及其他种植体的存在也会影响影像放大程度。
牙科种植体在CBCT上显示出明显的直径增加，锆种植体的这种效应比钛种植体更明显。在临床环境中可能会出现类似效应，这可能会掩盖骨结合不良、减小种植体周围缺损的尺寸和/或导致对颊侧骨厚度的低估。
