Is it a good idea to get subglandular implant of 375cc high profile silicone with the asymmetry of my right breast? (Photo)

The modest asymmetry in the photograph is fairly commonly seen. A straightforward approach to breast augmentation is indicated. I would recommend you consider silicone gel implants in a sub glandular position. Determination of profile is based on your aesthetic goals in the dimensions of your chest.

There is no one right answer, but from your pictures, it appears that you could get a nice result with a dual plane submuscular implant, which over time would have a lower chance of capsular contracture. If the asymmetry is of significant concern it could be improved with a periorareolar incision on the lower side which would improve the asymmetry if not completely correct it.

You have asymmetrical volume, shape and
position.Implants alone will not solve
your problem.I recommend a new
technique called Breast Augmentation with Mini Ultimate Breast Lift™.Using only a circumareola incision it is
possible to reshape your breast tissue creating upper pole fullness, elevate
them higher on the chest wall and more medial to increase your cleavage.Aligning the areola, breast tissue and
implant over the bony prominence of the chest wall maximizes anterior
projection with a minimal size implant.Small round textured silicone gel implants placed retro-pectoral look
and feel more natural, are more stable, less likely to ripple or have
complications needing revision.Implant
profile is irrelevant in the retro-pectoral position since the muscle
compresses it.Unfortunately, you have
not told us your bra size but is you are 32 or 34 each 100 cc’s of implant
corresponds to 1 cup size change.If you
are 36 or 38 each 200 cc’s of implant corresponds to 1 cup size change.From this, you can compute the volume
required to achieve your desired goal.Best Wishes,Gary Horndeski, M.D.

rippling and bottoming out are worse with implants above the muscle, not below the muscle.  Also your asymmetry is pretty minimal and no woman has two identical breasts.  

It is hard to appreciate the exact amount of asymmetry that you have based on your pictures because your arms are at different angles.  This tends to distort the breasts.  Volume-wise, you appear to have close to the same volume so I doubt that you would need different volume implants.  I think that you would be fine with placing the implants below the chest muscle.  I think this would give you the best result in the long run.  If one nipple/areola is noticeably lower than the other then this could be corrected with a peri-areolar (aka, donut) breast lift on the lower side.  Still, at the end of the day, a little bit of asymmetry is normal and natural looking.

There are many different choices to augment your breast depending on what you want to achieve. If you are wanting a more round look then the way proposed might be effective. I prefer to place most implants under the muscle for future mammography, decreased ripple formation , and try to decrease scar tissue from forming around implants. It appears you have 1st degree ptosis-droopiness and a simple augmentation will fill out your breast…subgladular or submuscular. I do like smooth wall implants as they have more predictable feel and results in my hands. The size looks like a very nice match for your body and will give you a very pleasant shape.

With all your concerns best to obtain a few IN PERSON second opinions. My guess is sub muscular placement is OK. But you still need to address the asymmetry seen in the posted photo...

From your pictures only, I recommend a dual plane silicone gel augmentation. There are many ways to achieve excellent augmentation results, but a dual plane position provides more implant coverage, less risk of capsular contracture,  and better breast tissue vasculature than a pure sub glandular location. I find the dual plane position also allows more options should you ever need a revision in the future.  Your slight asymmetry can be addressed using this approach.

Thank you for the question and pictures.  In my practice, I would likely offer you a sub muscular (dual plane) breast augmentation; the use of different size (sometimes even different profiles) breast implants would likely help improve breast symmetry. Ultimately, careful communication of your goals (in my practice I prefer the use of goal pictures and direct examination/communication in front of a full-length mirror) will be critical.
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 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. I have found that the use of words such as  “natural” or "C or D cup” 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.  The use of computer imaging may be very helpful during the communication process.
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, and the attached link (dedicated to breast augmentation surgery concerns), helps.

I prefer to place implants under the muscle for more soft tissue coverage but to size your properly, it should be hard to determine the right implant for you without an exam in person.