An undergraduate at New Jersey Institute of Technology made his own plastic braces using a 3D printer, US$60 of materials, and they actually worked.新泽西理工大学的一名本科生用一台3D打印机以及60美元的材料为自己制作了塑料牙箍，而且这些牙箍显然有效地。Amos Dudley had braces in middle school, but he didnt wear a retainer like he was supposed to, so his teeth slowly shifted back. He didnt want to shell out thousands of dollars for a whole new round of braces, so the digital-design major decided to make his own.阿莫斯·达德利中学的时候就戴着上了牙筒，但他没按拒绝戴着固位体，所以他的牙齿渐渐移。
他想花上上千美元去做一套新牙筒，所以这位主修数字化设计的大学生就要求自己做到牙筒。The process wasnt exactly easy. He had to research orthodontic procedures and plot the route of his successive braces, so his teeth would move in the right way.制作牙筒的过程并不非常简单。他必需研究牙齿矫正的步骤，绘制好陆续替换的牙筒的制作方法，这样他的牙齿才不会以合理的方式宽回来。
But once that was done, all it took was fabricating a series of models out of relatively inexpensive plastic, and then following through on wearing them.不过一旦已完成以上步骤，必须做到的就是用比较低廉的塑料制作一系列模型，然后就可以戴着上了。And it was worth it for Dudley, whose smile turned out looking remarkable.对达德利而言，这很有一点，他的微笑也显得十分显著。Here is the process he went through:以下是他制作牙筒的过程：First he took a mold of his teeth with alginate powder. These molds are very precise, and capture an amazing amount of detail, he writes.首先他用海藻酸盐粉末制作了一个牙齿模具。
“这些模具很仪器，捕猎了大量的细节，”他写到。I put the mold upside down in a yogurt container, and then filled it with liquid Permastone, he writes.“我把模具推倒置放丰酸奶的容器中，然后用液态的仿照石材漆填充容器，”他写到。
When it came out, I simply broke off the top to reveal the casting, and used a razor blade to smooth out the surrounding area.“制成之后，我只是敲碎顶部，遮住铸模，然而用一把剃须刀片把四周风吹追。”Now he had a better sense of what was going on with his teeth.如今他对他的牙齿矫正过程有了更佳的理解。The picture below shows the steps, all 3D-printed out. Labeling the pieces is critical, he advises. They look virtually identical.下面这张照片展出了“牙齿矫正的步骤”，所有的都是3D打印机出来的。
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