You should expect about 3 to five years (possibly 7 years) of use from the composite and as many as 20 years or longer from an amalgam restoration. Actually a well-cared-for amalgam filling can last a lifetime, so the expensiveness of the filling really becomes a minor consideration.
This shows how well the kidneys are performing. In a normal healthy person the GFR stays close to the same value all of the time. The test is done by taking blood from a person and sending it to a laboratory. Normal values are between 90ml/min and 110ml/min.
What is the normal range for GFR results? The normal range for glomerular filtration rate, or GFR, is 90 to 120 milliliters per minute, per 1.73 m2, as stated by MedlinePlus. Due to sample and measurement variations among different labs, the normal range may vary from one lab to another. Full Answer >.