What does it mean on x-ray results if knee joint spaces are preserved?

Doctor speak: This is doctor speak for normal. The increase or decrease in the size of a joint space is one thing they look for as needing to be explained by an abnormal cause.

Articular cartilage: It means that the articular cartilage, that provides a buffer between the bones of the joint is of normal thickness. Have a healthy diet, exercise 30 minutes/day, drink plenty of water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. For nutrition: http://www.choosemyplate.gov/. Get HPV vaccine. Wish you good health!