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.
The normal glomerular filtration rate could range anything from 90 to 140 mL/min. The normal glomerular filtration rate value ranges might vary slightly from laboratory to laboratory. It is important to check with your health care provide about what your particular test results mean.