Aim: Maxillary dental arch widths were evaluated in individuals having unilateral (UCLP) and bilateral (BCLP) cleft lip and palate (CLP) using three-dimensional (3D) digital models. Material and Method: The study had ...Aim: Maxillary dental arch widths were evaluated in individuals having unilateral (UCLP) and bilateral (BCLP) cleft lip and palate (CLP) using three-dimensional (3D) digital models. Material and Method: The study had been conducted on 80 individuals aged between 14 - 17 years having UCLP and BCLP. 40 of the individuals had UCLP, whereas 40 had BCLP. The maxillary dental models taken from patients before the treatment were scanned using Orthomodel Programme (v.1.01, Orthomodel Inc., Istanbul, Turkey) to obtain 3D imagery. Student’s t-test was used in order to assess the data obtained by using SPSS software version 22.0. Results: In BCLP, the average inter-canine distance was 17.44 ± 1.31 mm, the average inter-molar distance was 36.57 ± 1.12 mm, while inter-canine/inter-molar ratio was 0.47. Whereas in UCLP, it was 25.10 ± 0.63 mm, 42.20 ± 0.53 mm and 0.59. The inter-canine distance in UCLP was found to be large enough to be statistically significant (p 0.05), even though there were differences in inter-molar widths. Conclusion: For the stable orthodontic treatment results, one of the most important points is arch form and widths to be coherent with each other. In our study, the increase of inter-canine distance seen in UCLP indicates that in the cleft region, the maxillary arch is inclined over to the back, while the same situation in BCLP suggests that the maxillary segments are collapsed inside. The difference in the arch is highly affected by the primary surgical treatment.展开更多
目的:利用CT原始数据建立一个包含骨缝的唇腭裂颅上颌复合体有限元模型,并对模型的有效性进行验证,为唇腭裂颅上颌相关的生物力学研究提供一个可靠的建模依据。方法:选择1例替牙期单侧唇腭裂(unilateral cleftlip and palate,UCLP)患者...目的:利用CT原始数据建立一个包含骨缝的唇腭裂颅上颌复合体有限元模型,并对模型的有效性进行验证,为唇腭裂颅上颌相关的生物力学研究提供一个可靠的建模依据。方法:选择1例替牙期单侧唇腭裂(unilateral cleftlip and palate,UCLP)患者进行颅面部螺旋CT扫描,利用所得CT原始数据、三维重建软件Mimics和逆向工程软件Geomagic Studio建立一个颅上颌复合体的三维几何模型,再导入Solidworks三维CAD软件中,进行颅面部12条骨缝的切割和建模,最后在自编软件中进行网格划分和赋予材料属性。模拟临床条件,在所建模型上施加上颌前牵引力,分析颅上颌各骨性结构的位移及骨缝应力分布情况,并与文献资料进行对比,验证模型的有效性。结果:建立了一个包含骨缝并具有生物力学特征的颅上颌复合体有限元模型,模型由206 753个单元和260 662个节点组成。模型的几何相似性和有效性好,可被用于相关的生物力学研究。结论:应用CT薄层扫描数据结合相关工程软件,是一种有效的建立含骨缝唇腭裂颅上颌有限元模型的方法。展开更多
文摘Aim: Maxillary dental arch widths were evaluated in individuals having unilateral (UCLP) and bilateral (BCLP) cleft lip and palate (CLP) using three-dimensional (3D) digital models. Material and Method: The study had been conducted on 80 individuals aged between 14 - 17 years having UCLP and BCLP. 40 of the individuals had UCLP, whereas 40 had BCLP. The maxillary dental models taken from patients before the treatment were scanned using Orthomodel Programme (v.1.01, Orthomodel Inc., Istanbul, Turkey) to obtain 3D imagery. Student’s t-test was used in order to assess the data obtained by using SPSS software version 22.0. Results: In BCLP, the average inter-canine distance was 17.44 ± 1.31 mm, the average inter-molar distance was 36.57 ± 1.12 mm, while inter-canine/inter-molar ratio was 0.47. Whereas in UCLP, it was 25.10 ± 0.63 mm, 42.20 ± 0.53 mm and 0.59. The inter-canine distance in UCLP was found to be large enough to be statistically significant (p 0.05), even though there were differences in inter-molar widths. Conclusion: For the stable orthodontic treatment results, one of the most important points is arch form and widths to be coherent with each other. In our study, the increase of inter-canine distance seen in UCLP indicates that in the cleft region, the maxillary arch is inclined over to the back, while the same situation in BCLP suggests that the maxillary segments are collapsed inside. The difference in the arch is highly affected by the primary surgical treatment.
