Stereolithography (SLA) and selective laser sintering (SLS) are the other two techniques used in 3D printing. These techniques require more cost, labor, and training but are more accurate and can undergo sterilization techniques. SLA uses light-curable resin through a process called photopolymerization, while SLS uti­lizes a focused energy source like laser and electron beam [10]. SLS is more suit­able for metal-based implants like titanium and is therefore valuable in the setting of surgical disciplines, especially orthopaedics. One such technique is powder bed fusion, which involves deposition of a thin layer of powder on the building platform of the printer. To create the nal product, a thermal energy source such as a laser or electron beam fuses the regions indicated by the design. This process is repeated layer by layer until the nal desired product is reached [3]. SLS in particular may provide increased dimensional accuracy and granularity compared to extrusion methods (Fig.13.2b, c) [11].