Answers:
Prophylaxis is when you are given antibiotics before dental procedures, even a cleaning, GI tract or GU tract procedures. They also provide it for people for up to two years who enjoy had total unified replacements (sometimes longer or for life if they are at big risk) before indisputable surgeries and dental work. This helps beside preventing bacterial endocarditis.

Bacterial endocarditis occurs when microbes in the bloodstream (bacteremia) lodge on extraordinary heart valves or other tatty heart tissue. Certain bacteria customarily live on parts of your body, such as the mouth and upper respiratory system, the intestinal and urinary tracts, and the skin. Some surgical and dental procedures cause a brief bacteremia. Bacteremia is adjectives after many invasive procedures, but with the sole purpose certain germs commonly cause endocarditis. Certain heart conditions are associated more habitually with endocarditis than are others.

I appropriate antibiotics before any genus of dental work,etc, because I have a artificial heart spout.

Click these links if you would like more info:
http://www.americanheart.org/presenter.j...
http://www.webmd.com/oral-health/antibio...
http://www.mayoclinic.com/health/endocar...
http://en.wikipedia.org/wiki/prophylaxis...

---

I tried looking it up and it's a short time hard to digit out - but what I think it ability is that antibiotics should be taken to prevent infection (rather that to treat an infection that already exists.)

Doctors often grant antibiotics this way since when they perform a procedure that could introduce infection into the body.

---