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.
Glomerular filtration is the process by which the kidneys filter the blood, excreting waste products and fluids. Glomerular Filtration Rate (GFR) is a calculation that determines how well the blood is filtered by the kidneys. A GFR under 60 mL/min/1.73m2 may indicate kidney disease-the lower the number is, the worse the kidney function.