Additive manufacturing (AM) is recently imposing as a fast, reliable, and highly flexible solution to process various materials, that range from metals to polymers, to achieve a broad variety of customized end-goods without involving the injection molding process. The employment of biomaterials is of utmost relevance as the environmental footprint of the process and, consequently, of the end-goods is significantly decreased. Additive manufacturing can provide, in particular, an all-in-one platform to fabricate complex-shaped biobased items such as bone implants or biomedical devices, that would be, otherwise, extremely troublesome and costly to achieve. Polyhydroxyalkanoates (PHAs) is an emerging class of biobased and biodegradable polymeric materials achievable by fermentation from bacteria. There are some promising scientific and technical reports on the manufacturing of several commodities in PHAs by additive manufacturing. However, many challenges must still be faced in order to expand further the use of PHAs. In this framework, the present work reviews and classifies the relevant papers focused on the design and development of PHAs for different 3D printing techniques and overviews the most recent applications of this approach.

增材制造 (AM) 最近作为一种快速、可靠且高度灵活的解决方案来处理从金属到聚合物的各种材料，以在不涉及注塑成型过程的情况下实现各种定制的最终产品。生物材料的使用至关重要，因为该过程的环境足迹以及最终产品的环境足迹显着减少。特别是，增材制造可以提供一个多合一平台来制造复杂形状的生物基物品，例如骨植入物或生物医学设备，否则实现起来将非常麻烦且成本高昂。聚羟基链烷酸酯 (PHA) 是一类新兴的生物基和可生物降解的聚合物材料，可通过细菌发酵获得。有一些关于通过增材制造在 PHA 中制造几种商品的有希望的科学和技术报告。然而，为了进一步扩大 PHA 的使用，仍必须面临许多挑战。在这个框架中，目前的工作回顾并分类了专注于不同 3D 打印技术的 PHA 设计和开发的相关论文，并概述了这种方法的最新应用。