A novel approach for machining of cylindrical hard materials and arbitrary shapes is presented. Alumina-toughened zirconia dental implants with complex geometry are manufactured with femtosecond quasi-tangential laser ablation. This rapid prototyping approach for small-scale production decreases the development-time cycle tremendously and trumps conventional approaches. Moreover, a comprehensive parameter study for radial and tangential ablation with single and multi-pulse is presented. A process achieving an ablation rate of 1 mm³ min⁻¹ with a surface roughness R_a of 0.2 μm is introduced. The meta-stable tetragonal phase of the ceramic persists and is assessed via Raman spectroscopy. The small heat-affected zone is subsequently ablated with a radial laser process step. Hence, high-precision dental implants are producible with a mean error of smaller 5 μm over the complete contour.

提出了一种新颖的加工圆柱形硬质材料和任意形状的方法。采用飞秒准切向激光烧蚀技术制造具有复杂几何形状的氧化铝增韧氧化锆牙科植入物。这种用于小规模生产的快速原型制作方法极大地缩短了开发时间周期，并且胜过了传统方法。此外，提出了用于单脉冲和多脉冲的径向和切向消融的综合参数研究。在表面粗糙度R _a为0.2的条件下达到1  mm ³  min ^-1的烧蚀速率的工艺 引入μm。陶瓷的亚稳定四方相持续存在，并通过拉曼光谱法进行评估。随后通过径向激光加工步骤烧蚀小的热影响区。因此，可以 在整个轮廓上以较小的5μm的平均误差生产高精度的牙科植入物。