The answer: Implants do not need to be replaced every 10 years.
Rupture could be to blame for the symptoms you have, but you could also have a problem with your breast such as cysts or infection, and the only way to find out is to see a board certified surgeon and possibly get an MRI to evaluate your current implants. Implants do not need to be replaced just because of age, but they do need to be replaced when something is wrong.
The most common reason is capsular contracture, which affects 15-45% of patients. For many patients it’s not severe enough to warrant surgery, but for a small percentage, capsular contracture can distort the breast and cause pain. Rupture is another common reason to replace implants, with a published risk of about 1% for every year you have the implants.
Anecdotally it seems to be slightly less, although many patients have undetected rupture since rupture of silicone implants can’t always be detected by physical exam. That’s the reason the FDA recommends an MRI every few years after implants. Ruptured gel doesn’t usually cause complications right away, but over time, scarring, inflammation, and distortion of the breast can occur. Rupture of saline implants leads to deflation of the breast and is immediately detected in most patients.