Postgraduate Program in Dentistry, Cruzeiro do Sul University (UNICSUL), São Paulo, Brazil.
Department of Diagnosis and Surgery, São José dos Campos School of Dentistry, São Paulo State University (UNESP), São José dos Campos, SP, Brazil.
Int J Oral Maxillofac Surg. 2021 Dec;50(12):1609-1616. doi: 10.1016/j.ijom.2021.04.009. Epub 2021 May 4.
The aim of this study was to characterize the alveolar bone of edentulous maxillary sites using texture analysis (TA) of cone beam computed tomography (CBCT) images and to correlate the results to the insertion torque, thus verifying whether TA is a predictive tool of final implant treatment. This study was conducted on patients who had received single implants in the maxilla (46 implants) 1year earlier and whose torque values were properly recorded. Three cross-sections of the sites were selected on CBCT scans. Two regions of interest (ROIs) corresponding to the implant bone site and peri-implant bone were also outlined, according to virtual planning. The CBCT scans were exported to MaZda software, where the two ROIs were delimited following the previously demarcated contours. Values for the co-occurrence matrix were calculated for TA. With regard to the insertion torque value, there was a direct correlation with the contrast of the peri-implant bone (P<0.001) and an inverse correlation with the entropy of the implant bone site (P=0.006). A greater contrast indicates a greater torque value for insertion of the implants, and there is a possible association with a lower entropy value of the implant-bone interface.
本研究旨在通过对锥形束 CT（CBCT）图像的纹理分析（TA）来描述无牙上颌牙槽骨的特征，并将结果与植入扭矩相关联，从而验证 TA 是否是最终种植治疗的预测工具。本研究纳入了 1 年前在上颌接受单颗种植体植入的患者（46 颗种植体），且其扭矩值记录完整。在 CBCT 扫描上选择了三个部位的横断面，并根据虚拟规划勾勒出对应种植体骨部位和种植体周骨的两个感兴趣区（ROI）。将 CBCT 扫描导出到 MaZda 软件中，在该软件中，根据先前划定的轮廓限定了这两个 ROI。为 TA 计算了共生矩阵的值。就植入扭矩值而言，与种植体周骨的对比度呈直接相关（P<0.001），与种植体骨部位的熵呈负相关（P=0.006）。较大的对比度表示植入物插入的扭矩值更大，并且可能与种植体-骨界面的较低熵值有关。
