From the Department of Plastic Surgery, Loma Linda University Medical Center.
Plast Reconstr Surg. 2019 Jul;144(1S Utilizing a Spectrum of Cohesive Implants in Aesthetic and Reconstructive Breast Surgery):7S-12S. doi: 10.1097/PRS.0000000000005959.
Silicone gel implants vary in terms of gel cohesivity and form stability. Various degrees of gel cohesivity are obtained by varying the density of crosslinking between silicone polymers. Less cohesive gels are less crosslinked, are more elastic, and have a softer feel while more cohesive gels more crosslinked, are less elastic, and have a firmer feel. When a highly cohesive gel is able to maintain its intended distribution within an implant, the gel is referred to as being form stable. Thus, a form-stable implant is able to retain its designed shape and dimensions in any position. Gel cohesivity and form stability influence breast shape, softness/firmness, and in vivo implant performance and an understanding of these parameters is critical to implant selection.
硅凝胶植入物在凝胶内聚性和形态稳定性方面存在差异。通过改变硅聚合物之间的交联密度，可以获得不同程度的凝胶内聚性。内聚性较低的凝胶交联程度较低，弹性较大，手感较软；而内聚性较高的凝胶交联程度较高，弹性较小，手感较硬。当高内聚性的凝胶能够保持其在植入物内的预期分布时，凝胶被称为形态稳定。因此，形态稳定的植入物能够在任何位置保持其设计的形状和尺寸。凝胶内聚性和形态稳定性会影响乳房的形状、柔软度/硬度以及体内植入物的性能，对这些参数的理解对于植入物的选择至关重要。
