Mateu María E, Martínez M E, Dagum H, Benítez Rogé Sandra C, Bruno Gabriela I, Hecht Pedro, Folco Alejandra A
Department of Orthodontics, School of Dentistry, University of Buenos Aires, Argentina.
Acta Odontol Latinoam. 2014;27(2):58-62. doi: 10.1590/S1852-48342014000200002.
The aim of this study was to compare the results of measuring the height of the vestibular cortical bone of canine teeth by linear tomography (LT) and 3-D Accuitomo cone beam computed tomography (CBCT) before and after aligning dental arches by orthodontic treatment. LT and CBCT were performed before and after orthodontic alignment on 12 canines in three patients undergoing orthodontic treatment, and the height of the canine vestibular cortical bones measured in mm. Measurements were taken by double-blinded operators. The mean variation in height of the vestibular cortical bone with orthodontic treatment was - 0,33 mm} 0.233 standard error using CBCT and -0,08mm } 0.55 standard error using LT. Analysis of variance (ANOVA) was performed to compare the techniques, the patients and upper and lower canines. No significant difference was found for any of the cases. Using LT to evaluate vestibular crest cortical bone in canines is comparable in efficiency to using CBCT. Height in millimeters is less in LT because image resolution is lower and when it is very thin it is not appreciable by this method.
本研究的目的是比较在正畸治疗排齐牙弓前后，通过线性断层扫描（LT）和三维Accuitomo锥形束计算机断层扫描（CBCT）测量犬齿前庭皮质骨高度的结果。对3例接受正畸治疗的患者的12颗犬齿在正畸排齐前后分别进行LT和CBCT检查，并以毫米为单位测量犬齿前庭皮质骨的高度。测量由双盲操作人员进行。使用CBCT测量，正畸治疗后前庭皮质骨高度的平均变化为-0.33毫米±0.233标准误；使用LT测量，平均变化为-0.08毫米±0.55标准误。采用方差分析（ANOVA）比较这两种技术、患者以及上下颌犬齿。所有病例均未发现显著差异。使用LT评估犬齿的前庭嵴皮质骨，在效率上与使用CBCT相当。由于图像分辨率较低，LT测量的以毫米为单位的高度值较小，而且当皮质骨非常薄时，这种方法无法清晰显示。
