Janssen Nard G, Schreurs Ruud, Bittermann Gerhard K P, Borstlap Wilfred A, Koole Ronald, Meijer Gert J, Maal Thomas J J
Department of Oral and Maxillofacial Surgery, University Medical Centre Utrecht, Utrecht, The Netherlands.
Department of Oral and Maxillofacial Surgery, Radboud University Medical Centre Nijmegen, Nijmegen, The Netherlands.
J Craniomaxillofac Surg. 2017 May;45(5):685-689. doi: 10.1016/j.jcms.2017.02.018. Epub 2017 Feb 24.
A novel protocol for volumetric assessment of alveolar cleft grafting procedures is presented. Eleven cone-beam computed tomography (CBCT) datasets of patients who underwent secondary alveolar cleft reconstructive surgery for a unilateral alveolar cleft were evaluated by two investigators. Residual bone volumes 1 year after surgery were analysed using a semi-automated technique in which preoperative CBCT datasets were superimposed on the postoperative scans using voxel-based registration. To define the correct boundaries of the alveolar cleft defect in the preoperative CBCT dataset, a mirror image of the preoperative CBCT dataset was superimposed on the preoperative CBCT dataset. For the difference in residual bone volume between the two observers, an intraclass correlation of 0.98 and a Dice coefficient of 0.89 were found. This study describes a reliable segmentation protocol for volumetric analysis of the alveolar cleft defect in patients with a unilateral alveolar cleft.
本文提出了一种用于牙槽嵴裂植骨手术体积评估的新方案。两名研究者对11例接受单侧牙槽嵴裂二期重建手术患者的锥形束计算机断层扫描（CBCT）数据集进行了评估。采用半自动技术分析术后1年的残余骨体积，该技术通过基于体素的配准将术前CBCT数据集叠加到术后扫描图像上。为了在术前CBCT数据集中定义牙槽嵴裂缺损的正确边界，将术前CBCT数据集的镜像叠加到术前CBCT数据集上。两位观察者之间残余骨体积差异的组内相关系数为0.98，Dice系数为0.89。本研究描述了一种可靠的分割方案，用于单侧牙槽嵴裂患者牙槽嵴裂缺损的体积分析。
