使用 Little's 指数评估 CBCT 数字模型和传统模型。
Evaluation of CBCT digital models and traditional models using the Little's Index.
机构信息
Department of Orthodontics, University of Texas Health Science Center at Houston, 77030, USA.
出版信息
Angle Orthod. 2010 May;80(3):435-9. doi: 10.2319/083109-491.1.
OBJECTIVE
To determine if measurements obtained from digital models from cone beam computed tomography (CBCT) images were comparable to the traditional method of digital study models by impressions.
MATERIALS AND METHODS
Digital models of 30 subjects were used. InVivoDental (Anatomage, San Jose, Calif) software was used to analyze CBCT scans taken by a Galileos cone beam scanner (Sirona, Charlotte, NC) with a field of view of 15 x 15 x 15 cm(3) and a voxel resolution of 0.125 mm. OrthoCAD (Cadent, Fairview, NJ) software was used to analyze impression scans of patients at different stages of orthodontic treatment. Impressions were taken using alginate and were mailed to OrthoCAD for digital conversion. The scans were then electronically returned in digital format for analysis.
RESULTS
The maxillary mean scores for the Little's Index were 9.65 mm for digital models and 8.87 mm for InVivoDental models, respectively. The mandibular mean scores for the Little's Index were 6.41 mm for digital models and 6.27 mm for InVivoDental models, respectively. The mean overjet measurements were 3.32 mm for digital models and 3.52 mm for InVivoDental models, respectively. The overbite measurements were 2.29 mm for digital models and 2.26 mm for InVivoDental models, respectively. The paired t-test showed no statistical significance between the differences in all measurements.
CONCLUSIONS
CBCT digital models are as accurate as OrthoCAD digital models in making linear measurements for overjet, overbite, and crowding measurements.
目的
确定从锥形束计算机断层扫描（CBCT）图像的数字模型中获得的测量值是否与通过印模获得的传统数字研究模型方法相当。
材料与方法
使用 30 名受试者的数字模型。使用 InVivoDental（Anatomage，加利福尼亚州圣何塞）软件分析由 Galileos 锥形束扫描仪（Sirona，北卡罗来纳州夏洛特）拍摄的 CBCT 扫描，视野为 15 x 15 x 15 cm(3)，体素分辨率为 0.125 mm。使用 OrthoCAD（Cadent，新泽西州费尔维尤）软件分析不同正畸治疗阶段患者的印模扫描。使用藻酸盐进行印模，并将其邮寄到 OrthoCAD 进行数字转换。然后以数字格式电子返回扫描进行分析。
结果
上颌的 Little's Index 平均得分分别为数字模型的 9.65mm 和 InVivoDental 模型的 8.87mm。下颌的 Little's Index 平均得分分别为数字模型的 6.41mm 和 InVivoDental 模型的 6.27mm。平均覆盖测量值分别为数字模型的 3.32mm 和 InVivoDental 模型的 3.52mm。覆合测量值分别为数字模型的 2.29mm 和 InVivoDental 模型的 2.26mm。配对 t 检验显示所有测量值之间的差异均无统计学意义。
结论
CBCT 数字模型在进行覆盖、覆合和拥挤测量的线性测量方面与 OrthoCAD 数字模型一样准确。
Zotero 插件