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.
Most dental insurance policies emphasize prevention and diagnostics, typically covering two annual exams and cleanings, plus X-rays and, for children and older adults, fluoride treatments, says Evelyn Ireland, executive director of the National Association of Dental Plans, or NADP.o, a crown that results in $500 in patient costs under an indemnity plan might mean $400 in out-of-pocket costs under a PPO plan.That's the advantage of any plan with a network -- there's a negotiated discount, Ireland says.