Breast Implant Damage After Car Accident

Thanks for the question.
It is difficult to answer without examining you and seeing the issues you're concerned about.
After trauma there are several issues regarding implants:
First - Are the implants intact or has the trauma caused a leak? With saline implants this can be relatively obvious as deflation occurs almost immediately. With silicone implants this can be harder to detect.
Second - Has the envelope (including the capsule or scar tissue) around the implant ruptured or torn? This can cause asymmetry in implant positioning. Signs (in addition to the asymmetry) can include a tearing or popping sensation at the time of trauma or bruising around the breast.
Third - Has there been bleeding around the implant? This can result in a hard breast as a hematoma forms around the breast.
You should see a board certified plastic surgeon to evaluate your implants.
I hope this helps.

There are several things that may have happened. For example, the scar tissue around your right breast implant may have released, making your breast drop. The implant may have ruptured as well. Either way, you should see your surgeon. If you say that your left breast hasn't changed at all, then it's probably not capsular contracture. Either way see your surgeon, not the assistant!

From your photo, it looks like you may have a history of mild to moderate capsular contractures (scar tissue) on both sides. This shows up as firmness of the breasts, visible definition of the roundness of the implant, and oftentimes a higher, less saggy looking breast. Some patients like mild contractures when they are symmetric. Trauma to the chest can potentially "tear" part of the capsule (scar tissue), which subsequently releases it, so the breast then feels much softer and looks potentially lower or more ptotic (saggy). This is usually associated with mild transient bruising  and swelling  on the affected side and discomfort at the time of the injury which resolves. In addition, the implant can rupture. If the device is silicone, the best way to diagnose a rupture would be MRI. With saline, you usually see a size decrease. Regardless, the visible asymmetry in your central cleavage area, which shows in clothes, likely will need to be corrected with surgery if you don't see improvements with conservative treatment such as massage over a few months.