1 Have the equivalent of at least two years clinical experience as a dentist. 2  Complete an accredited three year full-time university degree in orthodontics. 3  Be registered as a Specialist in Orthodontics.
It opened on January 4, 2010. Soaring 828 meters (2,717 feet) the Burj Dubai in the United Arab Emirates is now considered the world's tallest building. Keep in mind, however, that these statistics include the skyscraper's enormous spire.
3. CN Tower, Canada - 1,815 Feet. At number 3 on the list of the world's tallest towers is the CN Tower in Toronto, Canada. At the time of its completion in 1976, the building was widely considered to be the world's tallest tower and free-standing structure.