Lopez Thais Torralbo, Michel-Crosato Edgard, Benedicto Eduardo de Novaes, Paiva Luiz Airton Saavedra de, Silva Diogo Cesar Borges, Biazevic Maria Gabriela Haye
Universidade de São Paulo - USP, School of Dentistry, Department of Community Dentistry, São Paulo, SP, Brazil.
Institute of Teaching and Research in Forensic Sciences , Guarulhos, SP, Brazil.
Braz Oral Res. 2017 Jan 5;31:e1. doi: 10.1590/1807-3107BOR-2017.vol31.0001.
The objective of this investigation was to compare the accuracy of mandibular measurements using a stabilizer (MS) with gold standard computed tomography (GS) images. Sixty mandibles were studied. Werth TomoScope HV Compact® was used to obtain CT images (GS), and the MS was also used. Analysis of the CT scans was performed using the VG Studio Max software® (Volume Graphics GmbH, Heidelberg, Germany), and MS was used after the proper positioning of the mandible. Descriptive and paired t test measures were used, and a ROC curve was calculated, as well as sensibility and specificity. MedCalc and STATA 13.0® were used (95% level of significance). Bicondylar breadth, bicoronoid breadth and minimum ramus breadth reached the highest concordance correlation coefficients at 0.99 (0.99-1.00), 0.99 (0.99-1.00) and 1.00 (0.99-1.00), respectively. Comparing observers with GS, the lowest accuracy was noted for the maximum mandibular length [0.59 (0.45-0.69), 0.64 (0.51-0.74)], the breadth of the right (0.14 (0.04-0.23), 0.14 (0.004-0.24)) and left mandibular body [0.14 (0.03-0.24), 0.16 (0.05-0.26)], and the right [0.58 (0.45-0.69), 0.63 (0.51-0.73) and left (0.59 (0.45-0.70), 0.59 (0.46-0.69)] mandibular angle. Various measurements exhibited good sensibility for males using MS: maximum mandibular length (78.12), bicondylar breadth (78.12), left mandibular notch breadth (84.37), and the left height of the mandibular body at the mental foramen (75.00). High specificity in discriminating females was observed for the left maximal ramus height (85.19), mandibular length (85.71), bicoronoid breadth (96.43), right height of the mandibular body at the mental foramen (82.19), bimental breadth (78.57), breadth right (92.86) and left (96.43) mandibular body, minimum ramus breadth (89.29), and left mandibular angle (85.71). MS was able to discriminate sexual dimorphism.
本研究的目的是比较使用稳定器（MS）进行下颌骨测量与金标准计算机断层扫描（GS）图像测量的准确性。对60个下颌骨进行了研究。使用Werth TomoScope HV Compact®获取CT图像（GS），同时也使用了MS。使用VG Studio Max软件®（德国海德堡的Volume Graphics GmbH公司）对CT扫描进行分析，在下颌骨正确定位后使用MS。采用描述性和配对t检验方法，计算ROC曲线以及敏感性和特异性。使用MedCalc和STATA 13.0®（显著性水平为95%）。双侧髁突宽度、双冠状突宽度和最小下颌支宽度的一致性相关系数分别达到最高值0.99（0.99 - 1.00）、0.99（0.99 - 1.00）和1.00（0.99 - 1.00）。与GS相比，下颌骨最大长度[0.59（0.45 - 0.69），0.64（0.51 - 0.74）]、右侧（0.14（0.04 - 0.23），0.14（0.004 - 0.24））和左侧下颌体宽度[0.14（0.03 - 0.24），0.16（0.05 - 0.26）]以及右侧[0.58（0.45 - 0.69），0.63（0.51 - 0.73）]和左侧（0.59（0.45 - 0.70），0.59（0.46 - 0.69））下颌角的测量准确性最低。使用MS对男性进行各种测量时显示出良好的敏感性：下颌骨最大长度（78.12）、双侧髁突宽度（78.12）、左侧下颌切迹宽度（84.37）以及左侧下颌体在颏孔处的高度（75.00）。在区分女性时，左侧下颌支最大高度（85.19）、下颌骨长度（85.71）、双冠状突宽度（96.43）、右侧下颌体在颏孔处的高度（82.19）、双颏宽度（78.57）、右侧（92.86）和左侧（96.43）下颌体宽度、最小下颌支宽度（89.29）以及左侧下颌角（85.71）具有较高的特异性。MS能够区分性别差异。
