The GI, or digestive, tract extends from mouth to anus (see the image below). The division of the GI tract into upper and lower is a matter of some confusion and debate.
Dental PPO insurance plans, also known as dental preferred provider organizations or DPPOs, are a popular dental insurance option due to their flexibility in allowing insured members to choose dentists and dental specialists.
For example, in a PPO or managed care dental plan, the dental insurance company has contracted a fee schedule with the dentist, who generally has an agreement with the insurance company to write off the difference in charges without charging the patient any additional out-of-pocket expense.