A periodontist is a dentist who specializes in the prevention, diagnosis, and treatment of periodontal disease, and in the placement of dental implants. Periodontists are also experts in the treatment of oral inflammation.
Ground speed. Ground speed is the horizontal speed of an aircraft relative to the ground. An aircraft heading vertically would have a ground speed of zero. Information displayed to passengers through the entertainment system often gives the aircraft ground speed rather than airspeed.
(Zillow) An in-ground pool is the ultimate in backyard upgrades. If you've always wanted one, now may be the time. Prices have fallen during the recession by up to 30 percent. Nevertheless, it remains a big investment, so it's important to make smart choices with regard to size, shape, site selection, and type.