Round oval butt implants placed intramuscularly, what is the risk of rotation?

I am assuming you are inquiring about teardrop, oval shaped buttock implants.???

“Flipping" or, more specifically, 180 degree clockwise or counterclockwise rotation is indeed a major problem with the old style "oval" implants...because technically, they are tear-drop shaped not true symmetric ovals. Traditional teardrop (aka "oval" or “round oval”) implants have over a 35+% risk of rotation and thus unnaturally change the buttock shape/appearance when doing so. However I had created back in 2015 and patented a new "Stanton Anatomic®️" shaped implant that avoids this issue. The benefit of this is the fact that over 95% of patients have more of an oval shaped buttock cheek not round, thus a true oval implant (i.e. Stanton Anatomic implant) creates a much more natural and harmonious buttock contour. This is especially true when the patient bends over, does squats, or pokes their butt out while striking a pose or dancing. Glad to be of help.

Gluteal implants are not placed under the muscle. The potential space under the gluteus muscles is too small. those who seem to get real implants right generally prefer intramuscular placement with implants anatomically fit within the gluteus muscle.
If properly placed intramuscular implants are unlikely to rotate. Implants placed above the muscle tend to shift and change positions because of pressure from sitting on the implants.
Do the land plants have a higher complication and failure rate.
Long-term patient satisfaction is relatively low with the majority of patients not being happy long-term.
The best chance of maintaining a patient satisfaction is to choose a plastic surgeon who specializes exclusively in gluteal implants, uses an intramuscular approach and stay with implants that are not larger than what can fit in the gluteus muscle.
Most plastic surgeons in the United States do not offer gluteal implants.
There’s a reason for this.
Best,
Mats Hagstrom MD