What does The term grossly intact mean concerning my saline breast implants?

My saline implants are only 15 months old. I just got results back from an breast ultrasoundscreening and the radiologist wrote on the report that my implants are grossly intact . I have no idea what that means. Could you please explain, and do you know if this is something that the doctor will fix for free and what may have caused it? I am so shocked my last implants lasted 15 years before one ruptured. I cannot believe I'm already having problems at only 15 months post op .