背景：这项研究的目的是开发一种低成本且个性化的外部乳房假体生产方法。
方法：投影光方法用于采集29岁健康女性左乳房的3D几何形状，69kg和1.69m。3D建模软件Blender用于制作假体模型和模具，并对模型的网格进行调整，比如平滑，分配厚度，并创建假体模具的壁。创建了两个反模具。这些碎片是在3D打印机StellaLite3上使用聚乳酸长丝制造的。最后,硅胶是着色的，模具被填满了。
结果：使用没有反模具的模具生产了假体的原型1，这导致了495克的假体，与相同乳房大小的传统假体相比，被认为是沉重的。为了解决这个问题，使用带销的反向模具生产质量为393克的原型2，比原型1轻20.6%。原型3是用中央容积反模制成的，质量为355克，与原型1相比减少了28.3%。最终的乳房假体是用带有不同硅树脂的针反模具制成的。它有乳头和乳晕色素沉着，质量为294克，比原型2轻25.2%。
结论：结果表明，投射光方法和增材制造是开发外部乳房假体的潜在工具，这可以改善乳房切除妇女的健康状况和生活质量。
The aim of this
study was to develop a low-cost and personalized method for external breast prosthesis production.
The projected light method was used for the acquisition of the 3D geometry of the left breast of a healthy 29-year-old woman, 69 kg and 1.69 m. The 3D modeling software Blender was used to make the prosthesis model and mold with adjustments to the model\'s mesh, such as smoothing, assigning thickness, and creating the walls of the prosthesis mold. Two counter-molds were created. The pieces were manufactured on the 3D printer Stella Lite 3 using polylactic acid filament. Finally, the silicone was pigmented, and the mold was filled.
Prototype 1 of the prosthesis was produced using a mold without a counter-mold, which resulted in a prosthesis of 495 g, considered heavy compared to traditional prostheses for the same breast size. To solve this issue, a counter-mold with pins was used to produce prototype 2 with a mass of 393 g, 20.6% lighter than prototype 1. Prototype 3 was made with a central-volume counter-mold and presented a mass of 355 g, a reduction of 28.3% compared to prototype 1. The definitive breast prosthesis was made with the pin counter-mold with a different silicone. It has nipple and areola pigmentation and a mass of 294 g, 25.2% lighter than prototype 2.
The results suggest that the projected light method and additive manufacturing are potential tools for developing external breast prostheses, which may improve the health conditions and quality of life of mastectomized women.
