Antibiotics cannot cure a root canal infection because the source of the infection is inside the tooth where there is no blood supply; without blood supply there is no mechanism to deliver antibiotics. The cure is the complete shaping, cleaning and obturation (sealing) of the contaminated root canal space.
Thanks for the A2A, Joseph Boyle. You've already gotten plenty of answers, but since they differ a bit, I may as well cast my vote. According to http://Space.com The minimum distance from the Earth to Mars is about 54.6 million kilometers. The farthest apart they can be is about 401 million km.
The average distance is approximately 225 million km ( or 1.50403 AU). The Earth has a shorter orbital period than Mars, it passes in between Mars and the Sun approximately every 780 days, or 2 years and 50 days. At that time , Mars is seen in the opposite direction from the Sun, at opposition. The time interval between Marsâ opposition and its least distance to Earth can be as large as 8 and a half days. In 2001, for example, opposition took place on June 13 but least distance was on June 21. Each opposition is followed by a very similar one 79 years later.