Tailgate Latch problems of the 2005 Ford F-150

On June 4, 2005 at about 6:30 pm I had loaded up some scrap aluminum (from a small shed we had took apart) into the bed of my truck. After finishing loading the scraps, I went to shut the tailgate which struck a thin 1- 1 1/2 inch wide piece of scrap hanging off the end of the bed part of the truck about 1-2 inches and the tailgate came off it's hinges falling onto my right knee. I have had to go to the er 2 times this weekend. Saturday night I had x-rays that have shown that the impact of the tailgate falling on my knee fractured my knee cap, I have a tomato hematoma in my knee, and tore a ligament in my knee. Sunday June 5th I had to have the fluid drained off my knee. Today (Monday June 6) I went to see my doctor and was given a date to have an mri done for this coming Thursday and also set up an appointment to see an orthopedic doctor. This was a bad experience, but it could have been alot worse if it had involved a child because those tailgates are very heavy and can cause some serious damage. I took my truck into the dealership today to have them make sure the hinges are not flawed or the hinges are in proper working order and this is a design flaw. The dealership I purchased this vehicle was north point Ford in north little rock ar. The phone number to this dealership is 501-945-1200.