Breast Lift for Upper Breast Roundness?

I have a very differrent opinion about your question.
You asked quite specifically if you can have an implant without increasing size. The answer to that is "no."
An implant augments your breasts, plain and simple. Any implant small enough to not noticeably augment your breasts will not be enough to add upper pole fill.
If you do not want to be larger, you should not have an implant.
As for whether a lift will give you substnatial upper pole fullness, I believe it depends upon the type of breast you have now. If you have young, firm, and glandular breasts, that simply are droopy because of the way they developed in puberty, then perhaps a lift can establish lasting upper pole fullness.
But if your breasts skin is at all sretched or inelastic, such as occurs after weight loss, age, or pregnancy, then your lower pole breast skin will slowly stretch with time, allowing the upper pole fullness established with the lift to dissipate.
I just attended a lecture by one of the world's authorities on breast lifting this past weekend, and she quite specifically pointed out that significat increases in upper pole fullness are rarely achieved with a breast lift.

Hi there-
It sounds like your goal is to have breasts which have a more youthful shape, with fulness in the upper pole, but that are not significantly larger than their current size...
This can be achieved in most women, but requires a very sophisticated approach, the success of which is highly dependent on the level of experience a surgeon has doing these complicated procedures.
I do think that you will be most happy with an implant, but probably also will need a reduction of your breast tissue- which is what makes the procedure more complicated...
It is very important for you to find a surgeon with a great deal of experience doing breast surgery- ask to see photos of other patients and maybe even to speak to a few.

Yes, implants are often used to augment upper pole fullness during breast lift surgery. Usually, a large implant is not necessary and make a nice difference. The other option is auto-augmentation, by using the tissue that is normally removed during a lift to augment the upper portion of the breast. Good luck with your surgery.

There are mastopexy techniques which manipulate your breast tissue to add volume to the upper pole of the breast but these techniques do not create long lasting upper pole fullness like an implant does.
A small implant at the time of the lift can give reliable fullness to the upper pole of the breast without altering the breast size dramatically. The breast will be larger as you are adding volume but it is distributed differently. If you do not currently fill your B cup breast, you may find you can wear the same cup size but you fill it out.
Be clear on your discussion with your surgeon as "roundness" implies a visible implant whereas "upper pole fullness" is still in the realm of natural.

Good luck with your decision.

Occasionally a breast lift will create upper breast fullness but this is not consistent and has a tendency to drop after surgery.
In order to achieve cosistent upper breast fullness, an implant is the most reliable method. If you do not want to change your cup size, this can sometimes be accomplished by a simultaneous reduction of the lower redundant portions of the breast while and the volume and upper breast fullness created by placment of a small implant