The Effect of Immersion Time on Biodegradation Rate Of Mg-Zn-Ca Alloy

In recent years, there has been growing interest in magnesium alloys as a new
generation of biodegradable stents for medical treatment especially in cardiovascular
disease. In order to prevent the vessel ruptured, stent needed to hold and open up the
vessels. Magnesium and its alloy has sufficient mechanical strength to act as a
stent. However, fast degradation of magnesium due to corrosion in the human bioenvironment
limits its effective use as stent. The stent is expected not to degrade within
6-12 months for the vessel to be healed. Current stents just can last for 3-6 months
before it dissolved. Magnesium alloy plays an important role to prolong the
degradation onset time.