Ito Kotaro, Kurasawa Mayu, Sugimori Tadasu, Muraoka Hirotaka, Hirahara Naohisa, Sawada Eri, Negishi Shinichi, Kasai Kazutaka, Kaneda Takashi
Department of Radiology, Nihon University School of Dentistry at Matsudo, 2-870-1 Sakaecho-Nishi, Matsudo, Chiba, 271-8587, Japan.
Department of Orthodontics, Nihon University School of Dentistry at Matsudo, Chiba, Japan.
Oral Radiol. 2023 Jan;39(1):75-82. doi: 10.1007/s11282-022-00604-3. Epub 2022 Mar 18.
This study aimed to quantitatively assess maxillary central incisor roots using pre-orthodontics computed tomography (CT) texture analysis as part of a radiomics quantitative analysis.
This retrospective case-control study included 16 patients with external apical root resorption (EARR) and 16 age- and sex-matched patients without EARR, after orthodontic treatment who underwent pre-orthodontics CT for jaw deformities. All patients were treated with a fixed orthodontic appliance before and after surgical orthodontic treatment. EARR was defined as root resorption ≥ 2 mm of the left and right maxillary central incisors on CT images more than 2 years after the start of orthodontic treatment. Texture features of the maxillary central incisor with and without EARR after orthodontic treatment were analyzed using the open-access software, MaZda Ver. 3.3. Ten texture features were selected using the Fisher method in MaZda from 279 original parameters, which were calculated for each of the maxillary central incisors with and without EARR. The results were tested using the Student's t test, Welch's t test, or Mann-Whitney U test.
Four gray-level run length matrix features and six gray-level co-occurrence matrix features displayed significant differences between both the groups (p < 0.01).
CT texture analysis was able to quantitatively assess maxillary central incisor roots and distinguish between maxillary central incisor roots with and without EARR. CT texture analysis may be a useful method for predicting EARR after orthodontic treatment.
本研究旨在利用正畸治疗前的计算机断层扫描(CT)纹理分析作为放射组学定量分析的一部分,对上颌中切牙牙根进行定量评估。
这项回顾性病例对照研究纳入了16例根尖外吸收(EARR)患者和16例年龄及性别匹配的无EARR患者,这些患者在正畸治疗后因颌骨畸形接受了正畸治疗前的CT检查。所有患者在正颌外科治疗前后均接受了固定正畸矫治器治疗。EARR定义为正畸治疗开始2年以上后,CT图像上左右上颌中切牙牙根吸收≥2 mm。使用开源软件MaZda Ver. 3.3分析正畸治疗后有和无EARR的上颌中切牙的纹理特征。在MaZda中使用Fisher方法从279个原始参数中选择了10个纹理特征,分别针对有和无EARR的上颌中切牙进行计算。结果采用Student's t检验、Welch's t检验或Mann-Whitney U检验进行分析。
两组之间的四个灰度游程长度矩阵特征和六个灰度共生矩阵特征显示出显著差异(p < 0.01)。
CT纹理分析能够对上颌中切牙牙根进行定量评估,并区分有和无EARR的上颌中切牙牙根。CT纹理分析可能是预测正畸治疗后EARR的一种有用方法。