Batbayar Enkh-Orchlon, Assink Nick, Kraeima Joep, Meesters Anne M L, Bos Ruud R M, Vissink Arjan, Witjes Max J H, van Minnen Baucke
Department of Oral and Maxillofacial Surgery, School of Dentistry, Mongolian National University of Medical Sciences, Zorig Street, Ulaanbaatar 14210, Mongolia.
Department of Surgery, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands.
J Pers Med. 2022 Jul 27;12(8):1225. doi: 10.3390/jpm12081225.
As 2D quantitative measurements are often insufficient, a standardized 3D quantitative measurement method was developed to analyze mandibular condylar fractures, and correlate the results with the mandibular condylar fracture classifications of Loukota and Spiessl and Schroll and clinical parameters. Thirty-two patients with a unilateral mandibular condylar fracture were evaluated using OPT, 2D (CB)CT images, and 3D imaging to measure the extent of the fractures. The maximum mouth opening (MMO) was measured. Ramus height loss could be measured only in OPT, but not in 2D CT images. The Intraclass Correlation Coefficient was excellent in the 3D measurements. In the Loukota classification, condylar neck fractures had the largest median 3D displacement and the highest rotations of the fracture fragments. The largest fracture volume was observed in base fractures. According to the Spiessl and Schroll classification, type V fractures had the largest median 3D displacement and the highest rotation in the -axis and -axis. Type I fractures had the largest fracture volume. We found a moderate negative correlation between MMO and 3D displacement and rotation on -axis. The 2D quantitative analysis of condylar fractures is limited, imprecise, and not reproducible, while quantitative 3D measurements provide extensive, precise, objective, and reproducible information.
由于二维定量测量往往不够充分，因此开发了一种标准化的三维定量测量方法来分析下颌髁突骨折，并将结果与Loukota和Spiessl以及Schroll的下颌髁突骨折分类和临床参数相关联。使用口腔颌面锥形束计算机断层扫描（OPT）、二维（CB）CT图像和三维成像对32例单侧下颌髁突骨折患者进行评估，以测量骨折范围。测量最大开口度（MMO）。升支高度丢失仅能在OPT中测量，而不能在二维CT图像中测量。三维测量的组内相关系数极佳。在Loukota分类中，髁突颈部骨折的三维位移中位数最大，骨折碎片的旋转度最高。基底骨折的骨折体积最大。根据Spiessl和Schroll分类，V型骨折的三维位移中位数最大，在y轴和z轴上的旋转度最高。I型骨折的骨折体积最大。我们发现MMO与三维位移和y轴旋转之间存在中度负相关。髁突骨折的二维定量分析有限、不精确且不可重复，而三维定量测量提供了广泛、精确、客观且可重复的信息。
