The most common reason implants fail is from capsular contracture, which causes folds or wrinkles in the implant. These folds rub together and weaken the impant, and it can eventually leak or deflate. Thos accounts for over 95% of patients I see who have had rupture.
When I staffed a major trauma center, I saw many patients with breast implants who suffered chest trauma from airbag deployment or seatbelt injuries after car wrecks, and their implants were almost always OK. I also have placed implants in individuals who are very active in sports, where falls, diving saves of a volleyball, etc are common. So far no ruptures !
Trauma in your case probably contributed to implant rupture, but my experience leads me to believe that the implants are pretty durable.