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利用CT数据处理技术与夹持工艺进行头盖骨钛网补片数字化设计与制备是一种新的设计制造方法。以典型的超大面积头盖骨缺损患者为研究对象,首先将病人头部的CT断层数据按照医学图像切割方法进行骨骼与头皮、脑组织的图像边缘切割,运用配准方法将切割出的头盖骨断层图像进行配准,并应用三维可视化技术实现患者头盖骨数学模型的重构。然后在此基础上,使用薄板样条插值技术按照头盖骨健康侧曲面延展过渡得到头盖骨补片的数学模型。最后,根据头盖骨补片的数学模型设计出头盖骨补片冲压成形所用的凸凹模具,并加工出所需的头盖骨钛网补片。该技术解决了头盖骨补片制备中存在的加工精度低、制作成本高、周期长等问题,同时提高了补片与缺损边缘的贴合精度。
The use of CT data processing technology and the clamping process of titanium mesh titanium mesh digital design and preparation is a new design and manufacturing methods. A typical large area of patients with cranial defects as the research object, the first patient’s CT data tomography in accordance with the medical image cutting method for the bone and scalp, brain tissue image edge cutting, the registration method using cut the skull tomographic images Registration, and application of three-dimensional visualization technology to achieve the reconstruction of the patient’s cranial mathematical model. Then based on this, the mathematic model of cranium patch was obtained by using the thin-plate spline interpolation technique according to the extension of the skull surface. Finally, according to the mathematical model of the cranial bone patch, the convex-concave mold used for the stamping of the skull patch is designed and the required skull mesh patch is processed. The technology solves the problems of low processing precision, high production cost, long period and the like in the preparation of the skull patch, and simultaneously improves the fit precision of the patch and the defect edge.