that is correct, a cavitation is an empty space in the jawbone where the tooth used to live. The jaw bone is capable of healing a hole that was made my having a tooth extracted from it but it is inhibited when conventional methods of extraction are used, leaving behind ligaments and a socket that had not been properly cleaned. the cavitation surgery involves opening up that pocket at the sight where the tooth was extracted and scraping out any infection. Scraping and drilling should be done until good, health bone has been reached.
Oil pulling can prevent problems that occur on the surface of the mouth and teeth but not issue that occur below the gum line. Since I had my wisdom teeth extracted 10 years ago, a thin layer of bone has healed over the surface, covering the extraction site and creating a pocket in the bone where the infection has become trapped. No amount of oil pulling with any oil will be able to draw infection from an area covered with bone (see link) http://www.dentalhelp.org/index.cfm?fuseaction=whatiscavitation
"Where focal infection is concerned, the chief initiating factor appears to be trauma to the jawbone. Such trauma may be physical, bacterial and/or toxic in nature. The most common initiating physical trauma seems to be tooth extraction as it is commonly performed. Most of us lost our wisdom teeth (3rd molars) early in life, either because they were causing a problem or because it was feared that they might. Ironically, extracting a wisdom tooth to prevent problems may end up causing problems instead. Often dentists (including oral surgeons) do not take the time when extracting a tooth to make sure all of the ligament that holds the tooth to the bone is removed, nor do they routinely remove a portion of the bone (which may be infected) that lines the socket. The result is that remaining portions of the ligament (which no longer serves a function) form a barrier to healing by interfering with blood flow to the area. Although the extraction site appears to heal properly, it is not uncommon for actual holes or pockets to form beneath the surface of the gum. When aerobic bacteria (those requiring oxygen) get trapped in such an anaerobic (no oxygen) environment, they change form and give rise to the production of extremely potent toxins. The hidden hole in the jawbone, a cavitation, has thus become an invisible incubation chamber for microbes, whose toxic waste products weaken the entire body."