Bones and joints

How long will my hip or knee replacement last?

Robert H. Shmerling, MD

Faculty Editor, Harvard Health Publishing

Anyone who needs a knee or hip replacement wants to know if it will be permanent, or if the replacement will need to be replaced at some point. While this is impossible to predict, and many factors affect longevity of replacement joints, data from past surgeries can help give some idea of what a person can expect.

Knuckle cracking: Annoying and harmful, or just annoying?

Robert H. Shmerling, MD

Faculty Editor, Harvard Health Publishing

Some people do it regularly, while others can’t stand the idea or sound of it, but either way, there is no evidence that knuckle cracking is harmful to your joints, or increases your chances of arthritis.