520cc Mentor saline implant compared to a 560cc Mentor saline implant: how big of a difference would it make? (Photos)

Thank you for the question and pictures.   A 40 cc difference in breast implant volume MAY create a noticeable difference in outcome,  depending mainly on the patient's specific anatomic starting point and personal goals.


My very general advice in this regard:  utilize breast implants only as big as necessary to "make you happy" long-term,  without having the most common regret ( "I wish I was bigger"). Again, generally speaking, smaller breast implants tend to "wear" better over the longer term.


My best advice: more communication.


It is definitely worth spending more time (prior to the date of surgery) with your plastic surgeon to discuss further.  As you know, it will be important for many reasons, that you feel comfortable that you and your plastic surgeon are on the "same page" prior to proceeding.


Generally speaking, the best online advice I can give to ladies who are considering breast augmentation surgery ( regarding breast implant size/profile selection) is:


1. Concentrate on choosing your plastic surgeon carefully. Concentrate on appropriate training, certification, and the ability of the plastic surgeon to achieve the results you are looking for. Ask to see lots of examples of his/her the morning yes thank you work.
2. Have a full discussion and communication regarding your desired goals with your plastic surgeon. This communication will be critical in determining breast implant size/type/profile will most likely help achieve your goals. 
In my practice, the use of photographs of “goal” pictures (and breasts that are too big or too small) is very helpful. For example, I have found that the use of words such as “natural” or "full C or small D cup" or "too large" etc means different things to different people and therefore prove unhelpful.
Also, as you know, cup size varies depending on him who makes the bra; therefore, discussing desired cup size may also be inaccurate. Again, the use of computer imaging has been very helpful during the communication process, in our practice.


3. Once you feel you have communicated your goals clearly, allow your plastic surgeon to use his/her years of experience/judgment to choose the breast implant size/profile that will best meet your goals. Again, in my practice, this decision is usually made during surgery, after the use of temporary intraoperative sizers.
I hope this helps. Best wishes for an outcome that you will be very pleased with.

the difference of 40cc is slightly more than 1 oz.  Assuming that both choices  are the round saline implant and not the teardrop shaped saline implant, the 40cc would likely give you a slightly larger upper pole fullness.  (very slight)  Saline implants are an older technology.  Is your PS board certified? Is he/she  recommending saline due to price considerations? Ask about warranties and rupture rates.Some surgeons will "overfill" a saline implant, so I think you need to have a frank discussion with your surgeon on why they are recommending saline, and what your expectations are for outcome  on how your breasts will look when you are not wearing a bra.