Is dual plane and biplanar the same technique?

Yes, dual plane and biplanar means the same, in that the implants are partially under the muscle and partially under the breast tissue. The lower part of the muscle is released, such that only the upper pole of the breast implant is covered by muscle. You may here it referred to as dual plane (biplanar) 1, 2 or 3 depending on the amount of muscles released.

These are very similar. Essentially, the pectoral muscle only covers the upper breast yet offers advantages.An exam and consultation with a plastic surgeon is recommended to discuss your options and expectations.

Thanks for your question.  As you suspected, the difference is most likely purely semantics.  Dual plane and biplanar are 2 terms for the same type of breast augmentation procedure.  It probably just depends on where your surgeon was trained as to which term they use regularly.  If you continue to have questions, please ask your plastic surgeon, or schedule a consult with a board certified plastic surgeon in you area.Best wishes!Dr. Brown