Dual plane augmentation (partly under the muscle, partly under the breast tissue) is a very common method of breast augmentation. In most plastic surgery offices this term is often interchangeable with 'sub muscular' term. Very rarely is an implant truly in a purely sub muscular plane only. The benefit of this approach, as mentioned by the other surgeons, is that it the muscle which overlies the upper part of the implant gives a more natural slope to the breast shape, hides rippling in the upper part, and is thought to lower the risk of capsular contracture. However, on the other hand it is associated with more pain, longer recovery, and an unnatural implant movement when the pectoral muscles contract. This technique, like the other breast augmentation techniques, has its pros and cons. Make sure you discuss them with your plastic surgeon so that you may be able to make a truly informed decision before you agree to the surgery. Sincerely, Martin Jugenburg, MD