Najafali Daniel, Liu Farrah C, Raman Karanvir, Maheta Bhagvat, Saldana Golddy Milagros, Heldman Lucas, Cevallos Priscila, Nazerali Rahim
Aesthet Surg J Open Forum. 2023 Feb 20;5:ojad018. doi: 10.1093/asjof/ojad018. eCollection 2023.
The use of breast tissue expanders (TEs) in breast reconstruction is accompanied by undesired changes to the chest wall and lateral plane. Breast TEs are designed to create a naturally formed breast pocket by capitalizing on the ductile response of skin tissue; however, in practice, the use of expanders is accompanied by undesired changes to the chest wall and lateral plane.
The authors of this study compared 3 comparably sized and commercially available breast TEs to assess the mechanical profile and functionality of each design.
Authors compared MENTOR Artoura PLUS Smooth (Irvine, CA), Allergan 133 Smooth (Irvine, CA), and Sientra AlloX2 Smooth (Santa Barbara, CA) filled to 100% of their label volume. The mechanical profile of TEs was assessed via vertical compression. Dimensions were recorded at baseline and percent changes were calculated at each compressive load (5-35 lbf intervals of 5 lbf).
Base width and projection were recorded at compressive loads of 10, 20, and 35 lbs. For percent changes of base width, MENTOR had 0.98%, 2.09%, 3.84%; Allergan 4.21%, 9.15%, 15.52%; and Sientra 4.72%, 10.19%, 19.15%. For percent changes of projection, MENTOR had -19.06%, -25.44%, -30.88%, Allergan -35.53%, -42.90%, -50.09%, and Sientra -29.64%, -37.68%, -44.69%. For percent change of height, MENTOR had 1.44%, 2.62%, 4.27%, Allergan 10.26%, 16.49%, 22.97%, and Sientra 6.99%, 11.93%, 16.90%. MENTOR's TE had the most pronounced lower pole with volume expansion.
The MENTOR TE demonstrated the least lateral deformation and projection loss across the range of compressive loads, as well as the highest force resistance compared with the other models.
在乳房重建中使用乳房组织扩张器（TEs）会伴随胸壁和外侧平面出现不良变化。乳房TEs旨在利用皮肤组织的延展性来创建自然形成的乳房腔隙；然而，在实际应用中，扩张器的使用会伴随胸壁和外侧平面出现不良变化。
本研究的作者比较了3种尺寸相当且市售的乳房TEs，以评估每种设计的力学特性和功能。
作者比较了填充至其标签容量100%的MENTOR Artoura PLUS Smooth（加利福尼亚州欧文市）、Allergan 133 Smooth（加利福尼亚州欧文市）和Sientra AlloX2 Smooth（加利福尼亚州圣巴巴拉市）。通过垂直压缩评估TEs的力学特性。在基线时记录尺寸，并在每个压缩负荷（5 - 35磅力，间隔5磅力）下计算百分比变化。
在10、20和35磅的压缩负荷下记录底部宽度和突出度。对于底部宽度的百分比变化，MENTOR分别为0.98%、2.09%、3.84%；Allergan分别为4.21%、9.15%、15.52%；Sientra分别为4.72%、10.19%、19.15%。对于突出度的百分比变化，MENTOR分别为 - 19.06%、 - 25.44%、 - 30.88%，Allergan分别为 - 35.53%、 - 42.90%、 - 50.09%，Sientra分别为 - 29.64%、 - 37.68%、 - 44.69%。对于高度的百分比变化，MENTOR分别为1.44%、2.62%、4.27%，Allergan分别为10.26%、16.49%、22.97%，Sientra分别为6.99%、11.93%、16.90%。MENTOR公司的TE在体积扩张时具有最明显的下极。
与其他型号相比，MENTOR公司的TE在整个压缩负荷范围内表现出最小的横向变形和突出度损失，以及最高的抗压力。
