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.
GFRâGlomerular filtration rate. 1  Purpose: To determine how much kidney function a person has. 2  Normal range: 90+, with little or no protein or albumin in urine. 3  How the test is conducted: This test is a calculation based on your creatinine level, age, race, gender and other factors.