If I had a breast reduction with 400g removed & want old breast size back, can I get 400cc implants?

If 400 g were removed following a breast reduction and implants of about that size were placed, the volume would be in the general vicinity of breast volume previously. Do remember a few things. Inherent in a breast reduction is a breast lift. One would expect with implants for the breasts to be more elevated than they were preoperatively. In general, higher breasts look larger than breasts that are lower on the frame, especially in clothing. Also, you may wish to discuss this with your surgeon. Some of the 400 g removed could have been from tissue closer to the armpit region. A 400 mL implant may make you look like you have more prominence than previously. A good discussion with your surgeon sounds helpful in your case. The overall volumes may be in the same ballpark but the look would be expected to be quite different from your pre-breast reduction appearance.

Thank you for your question. It’s very understandable to want to restore a breast volume that once felt right for your body.
While 400 grams and 400 cc might sound interchangeable, they are not always directly equivalent. Breast tissue has a different density and composition than silicone or saline implants. On average, 1 gram of breast tissue is roughly comparable to 1 cc of implant volume, but this ratio can vary depending on the firmness of the tissue and the type of implant being used.
That said, a 425 cc implant will likely restore a similar visible volume to what was removed, though the shape and projection may be different due to surgical technique, tissue elasticity, and implant profile. Also, keep in mind that implants tend to sit higher and rounder than natural breast tissue, especially in breasts that have previously undergone reduction.
To match your former breast size and silhouette as closely as possible, your surgeon will assess not just volume, but also skin laxity, nipple position, and the relationship between implant and chest wall. A 3D simulation or sizing session with implant sizers can give you a clearer sense of how different volumes will look on your frame.
Consulting with a board-certified plastic surgeon experienced in secondary breast procedures would be the best next step toward making a confident, personalized choice.
Warm regards,Op. Dr. Güray YeşiladalıBoard-Certified Plastic Surgeon

Thank you for your question. Unfortunately, without any photos I cannot determine what size implant can be placed. There is no one to one ration of fat removed to implant cc volume. You need to see a board-certified plastic surgeon to examine you and discuss options with you.