"So according to your understanding; from what I have told you , they should'nt have 'bone removal' to pull out this tooth ?"
It depends, I cannot say without your xrays and clinical exam if bone removal is necessary. As I mentioned, a lot of times its just a "surgical" extraction, which only means that they will use other methods to take out the tooth to lower trauma and speed up healing.
ASK your dentist exactly what they mean. Ask them what they plan on doing. If you do not know everything thats going on to your satisfaction, ASK or switch dentists.
"What is cavitation? How do I know I am going to a "hollistic" or traditional dentist?"
If your dentist does not advertise himself as a "hollistic or biologic" dentist, they are traditional. Cavitation is an unsupported problem many "hollistic" dentists bring up for various reasons, unless that word was used during your visit, I would not give it a second thought.
"How many roots are in a tooth? TWO?"
Depends on the tooth. Front teeth have one root (canine to canine). Premolars have 1-2 roots. Lower molars have 2 roots. Upper molars have 3 roots.
"What you are saying is, that this method is done over a period of time?"
What I mean is the time you are in the dental chair. All methods are done in the same visit. However, by removing minor amounts of bone, a dentist can sometimes extract a tooth in much less time than if they don't remove bone, this also increases healing and decreases post-op pain. (example: difference between 30 minutes and 15 minutes)
I would ask your dentist exactly what he means by "remove bone" and WHY. A good dentist will answer your questions until you are satisfied (to a point). As with anything involving your body, GET INFORMATION before you have something done....it is your body afterall. If the dentist will not answer your questions, find another dentist.