 SANTA BARBARA, Calif., Aug. 25, 2021 GLOBE NEWSWIRE -- Sientra, Inc. NASDAQ: SIEN Sientra or the Company, a medical aesthetics company uniquely focused on plastic surgery, today announced that a recent independent study out of Stanford Universitys School of Medicine, published in PRS Global Open, has confirmed that the Sientra AlloX2 dual port tissue expander enables efficient management of seroma and early targeted intervention in prepectoral breast reconstruction. 