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学科主题: 口腔医学
题名:
Patient-specific modeling of facial soft tissue based on radial basis functions transformations of a standard three-dimensional finite element model
作者: Lou Hang-di1; Chen Si2; Chen Gui2; Xu Tian-min2; Rong Qi-guo1
关键词: finite element model ; facial soft tissue ; model transformation ; radial basis functions ; landmark points
刊名: CHINESE MEDICAL JOURNAL
发表日期: 2012-11-20
DOI: 10.3760/cma.j.issn.0366-6999.2012.22.028
卷: 125, 期:22, 页:4066-4071
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Medicine, General & Internal
研究领域[WOS]: General & Internal Medicine
关键词[WOS]: MAXILLOFACIAL SURGERY ; SCATTERED DATA ; INTERPOLATION ; DEFORMATION ; RETRACTION
英文摘要:

Background An important purpose of orthodontic treatment is to gain the harmonic soft tissue profile. This article describes a novel way to build patient-specific models of facial soft tissues by transforming a standard finite element (FE) model into one that has two stages: a first transformation and a second transformation, so as to evaluate the facial soft tissue changes after orthodontic treatment for individual patients.

Methods The radial basis functions (RBFs) interpolation method was used to transform the standard FE model into a patient-specific one based on landmark points. A combined strategy for selecting landmark points was developed in this study: manually for the first transformation and automatically for the second transformation. Four typical patients were chosen to validate the effectiveness of this transformation method.

Results The results showed good similarity between the transformed FE models and the computed tomography (CT) models. The absolute values of average deviations were in the range of 0.375-0.700 mm at the lip-mouth region after the first transformation, and they decreased to a range of 0.116-0.286 mm after the second transformation.

Conclusions The modeling results show that the second transformation resulted in enhanced accuracy compared to the first transformation. Because of these results, a third transformation is usually not necessary. Chin Med J 2012;125(22):4066-4071

语种: 英语
所属项目编号: 30672350 ; 10872007
项目资助者: National Natural Science Foundation of China
WOS记录号: WOS:000312748100029
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/66019
Appears in Collections:北京大学口腔医学院_期刊论文

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作者单位: 1.Peking Univ, Coll Engn, Beijing 100081, Peoples R China
2.Peking Univ, Sch Stomatol, Beijing 100081, Peoples R China

Recommended Citation:
Lou Hang-di,Chen Si,Chen Gui,et al. Patient-specific modeling of facial soft tissue based on radial basis functions transformations of a standard three-dimensional finite element model[J]. CHINESE MEDICAL JOURNAL,2012,125(22):4066-4071.
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