A method of medical ablation of tissue accessible thorough the mouth or nose is disclosed having the steps of: a) inserting a probe through the mouth into the oral cavity, wherein said probe has a disposable electrode enclosed within an insulating sleeve bendable therewith; b) steering said probe through the oral cavity into close proximity to the tissue; c) extending the disposable electrode and the insulating sleeve out of the probe and penetrating the tissue; and d) applying RF energy to the tissue surrounding the electrode to effect ablation of said tissue.