Subfascial Implant Placement Risks?

Your question is a very good one. The subfascial technique is something I have been doing for 6 years and more than 400 cases. It is still uncommon in the U.S. but widely used in South America, Canada, and other countries.
The fascia is a thin but tough layer on the surface of the muscle, so it can be used for support of the implant but it isn't thick enough to add "padding". There are some variations that help with this while still correcting the distortion that occurs with muscle activity. If you like, I can send you a copy of my article on the subject.
Capsular contracture occurs in the same percentage of cases as under the muscle in my experience, and problems of malposition such as bottoming out are actually less common because one of the causes of that is the muscle pushing the implants down when they are under. I have had no cases of symmastia with the subfascial technique.
Please contact me if you would like a copy of the article or have any other questions.

I am doing subfascial breast
augmentation in most cases since 1999.Subfascial breast augmentation
actually leads to optimal results especially in women more than AA and B
cup size and when we select the most suitable size of implant under a
meticulous hemostasis and creating the right size pocket under the fascia with a long and thin cautery no-touching  the breast tissue.We are able to work with two types of implants
cohesive I and II Mentor,USA (no finacial benefits) according to breast
elasticity and the breast tissue amount .We have
achieved a very good  and long lasting results and our capsular
contracture rate is very low.This type of breast implant placement does
not create any bottoming out and or any distortion.In terms of the results i
do believe that create the most natural appearance of the new breast either when someone
touch the breast or the way the breast look under the bra.