a system includes an implantable polymer for increasing the dimensions of layers of tissue . in one embodiment , the implantable polymer is delivered transorally using a scope and injection needle . the system allows for visualization and injection of polymer into the lower esophageal sphincter . methods of treating gastroesophageal reflux disease include insertion of the distal portion of the injection needle into the esophageal tissue and injection of a polymer liquid to enlarge tissue dimensions . the polymer can be injected at several sites to distribute localized pressures and attain better distribution of the tissue bulking effect .