How many knee replacements can a person have?

I had full bilateral knee replacements back in December of 2007. It went well. After about 3 home visits from the home nurse I was told I would be going in for more therapy. They would call me. No call for a week so I call them. They said they are not set up yet. I said.. time is wasting I need to keep this therapy going. The 4th time I called them asking for my appointments they said that I said to cancel them. WHAT?!  Needless to say, someone on their side messed up. I didn't get any of those therapy appointments. 2 full knee replacements on the same day and no therapy after the 1st 3. (the knee replacements were from a fall onto a cement slab onto both of my knees. 7 years later they are doing these replacements).

10 years later ~ Sept. 2016, I just had left thumb arthoplasty. My hand and forearm was in a soft cast. I'm out in the yard and I fall. Into the fall I'm thinking how I want to land. I don't want my arm to hit the ground and mess up the surgery. I don't want to fall on my knees. My left knee hit the ground first then my surgery arm hit. My left femur broke completely across the bone. Ambulance is called. I'm told after xrays that I cannot move the leg at all because it's like a shattered glass and if I move it the shattering will keep going up the leg. 

2 months after that femur surgery of which they inserted a rod into it. (I was able to walk on it the next day), I'm in therapy for my leg and again the pain in my knee on the inside of leg where the collateral ligament is had so much pain. After I had 5 doctors look at my leg (no one was able to see the problem because of all the metal in my legs), I'm left with the 5th doctor physically examining my knee and knocking it back and forth and said... "your knee is lose". The knee was already 10 years old so I'm saying replace it. I said I know the ligament is torn or not attached because my knee kept twisting i place for about 11 months during all of these frustrating appointments. It would twist and then lock up. The pain was unbelievable. Finally a very good sports doctor did my surgery. He said there was a lot of wear on the prosthetic of the two ends twisting in place. Also he said that the ligament was NOT doing me any good. So.... all this time and I finally find out that I was right and the doctors don't listen to us and made me go through a lot of suffering because they could not figure this out. 

The biggest issue I have about this is, in the first place, the surgeon at the beginning who put the rod in my femur, he knew I had a fake knee. He was the one that told me taking xrays or MRI's or ultrasounds aren't going to show a problem when there is already metal in the way. My comment is.... Ok, with that knowledge then when  you were putting the rod in my femur why didn't you take the extra time to inspect the surrounding area, since this was an accident injury, and MAKE SURE that I didn't injure the ligaments that hold it in place. I kept telling the emergency room doctors that my knee hit the ground first. So there was an impact spot close to the break. The break for my femur was only 2 inches above the knee. It's at the bottom of my femur, not the middle or not the top of the leg. 

In October 2017, I finally get a second full knee replacement. This one is a "CONFINED KNEE REPLACEMENT" meaning the shanks are longer and the knee has a tendon/ligament like connector that runs up the center holding the knee in place better. All is well and I was in therapy for 2 months then my insurance changed. I had to cancel all future appointments because now I'm paying more then I can for my coverage and the coverage does not like physical therapy. Since then I have fallen a few more times. The last time was pretty hard and I KNOW I have now loosened the right knee because it's tried to twist on me while walking.

I'm afraid to move these days. I'm almost 63 years old. I am retired because of all these physical issues. I am walking worse then my father and he's almost 93! I am not using a walker but I'm close to it. I am a serious vegetable garden grower. I'm trying to get back into it for this season but I can hardly walk. I have had 17 hand surgeries (both hands totaled up) and have wrist issues too. So using my hands and wrists are very difficult but of course I'm having to use them. So getting on the floor is very very difficult and getting up almost impossible. I've had feet issues and nerve pain. Including issues with A-Fib and Fibermyalgia. The nerve pain throughout is challenging also. I also have osteopenia. So when does the osteoperosis kick in? 

My question is how many knee replacements can a person have? I tend to fall alot from being unbalanced in my walking. I have not had my knee looked at to see if it now needs to be replaced. My insurance changes to Medicare on June 1st because of my disability benefit that allows me to go on it before I'm 65. That's when I can get to a doctor. If I need that knee replacement and then I fall again... what's next? I don't think they can give me a larger knee. 

Whew! That was a lot of typing. 

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