Is there a difference between the J shaped buttress and the horseshoe buttress of a knee brace? I am looking for a new brace and without insurance I cannot go to the doctor and ask. I currently have a brace that address my lateral subluxation and valgus movement. When I do a search online I keep coming up with 22 pages of braces and its really confusing. I am about to be totally with a brace for work because it is literally hanging on by a thread. HELP! Thanks in advance for your responses.