I found this article very interesting. It explains that relation between bow legs and knock knees to arthritis.
Here is the article about Bow Legs and Arthritis.
I searched for pictures of before and after the bow legs correction surgery. I found this websites very informative: http://www.doctorveklich.com/patients.htm.
I must say that these pictures (and information from the site) makes me really consider the bow legs surgery option… It doesn’t look too painful, and seems like the results are good too.