biomaterials are disclosed comprised of biodegradable , biocompatible , and bioabsorbable nonwoven fabric materials for use in surgery for the guided regeneration of tissues . the non - woven fabric materials are comprised of threads embedded in a matrix , wherein both the matrix and the threads can be comprised of esters of hyaluronic acid , used singly or in combination , or esters of hyaluronic acid in combination with esters of alginic acid or other polymers .