Table 12.

Polymer-free Stents and their characteristics

Surface modification technique	Stent	Platform	Drug	Drug quantity ( µg/m2)	Release kinetics
Reservoirs
Laser	NEVO	CoCr	Sirolimus	9.7	80% in 30 days
Sculpted	Janus Flex	SS	Tacrolimus	2.3	50% in 30 days
Drilled	Medtronic’s drug filled stent	CoCr with Tantalum core	Sirolimus	33	–
Pores through microblasting	Yukon	SS\CoCr	Sirolimus	120	60 days
Porous hydroxyapatite coating	VESTAsync	SS	Sirolimus	2.9	30 days