Root canal treatment

Root canal treatment
Years ago when a tooth used to start hurting, or a swelling around it was noticed, the only way out to get relief, was to get rid of them tooth. So dentists used to extract the tooth in question. But now science allows us to save the tooth by a rather painless and easy method called ROOT CANAL TREATMENT
WHEN DOES A TOOTH NEED A ROOT CANAL TREATMENT?
a) Throbbing pain in the tooth which especially increases on lying in bed at night
b) Sensation to hot and or cold food/drinks
c) Swelling around the gum or in the jaw bone
WHY DOES A TOOTH NEED A ROOT CANAL TREATMENT?
Tooth decay if left untreated spreads into the substance of the tooth ultimately infecting the pulp. Once the pulp becomes infected with more bacteria than it can handle, it begins to degenerate. As with any infection there is formation of pus, which tends to get accumulated at the tip of the roots within the jawbone, forming a "pus-pocket" called an abscess. This abscess not only causes pain and swelling but also affects the jawbone.
WHAT IS A ROOT CANAL TREATMENT?
Root canal is the treatment in which the infected pulp is removed from the tooth and the space occupied by it is cleaned and filled with a special filling material.
HOW IS A ROOT CANAL TREATMENT DONE?

From: http://pediatricdentists.blogspot.com/2011/12/root-canal-treatment.html#.TuclWgrr5k0.pingfm