Stent
A stent is a vascular support made of metal or synthetic fibers inserted into vessels or hollow organs to support them or keep them open.
Stereolithography
Stereolithography is a lithographic 3D printing process for producing components from liquid plastic. The plastic is irradiated with ultraviolet light or ultra-short laser pulses, for example, and cured layer by layer with pinpoint accuracy.
Strontium
Strontium (Sr) is an alkaline earth metal, silver-white in colour and reactive, especially with water and oxygen. It is used especially in atomic clocks and in medical imaging procedures.