You may find these publications of interest.
Outcome of reconstruction of cutaneous limb defects in dogs using hygroscopic "self-inflating" tissue expanders.
De Lorenzi M, Swan MC, Easter C, Chanoit GPA
J Small Anim Pract. 2018 Feb;59(2):98-105. doi: 10.1111/jsap.12766. Epub 2017 Nov 2.
WHAT IS TISSUE EXPANSION
Tissue expansion is commonly used in human reconstructive surgery to grow extra skin through controlled mechanical overstretch.
WHAT IS EXPANIDERM
Expaniderm is the first in a new class of implantable soft tissue expanders, offering control, reliability and convenience.