This is a prospective, double blind randomized controlled trial. In this study we will
investigate the influence of hyaluronic acid injection to knee after knee arthroscopy, when
known or discovered cartilage damage greater than International Cartilage Research Society
score (ICRS) grade 2 is found. The indication for arthroscopy is not necessarily the
cartilage damage. A set of 3 consecutive injections will be administered and follow up of
physical examination and questionaries will be done.
Our null hypothesis is that the administration of hyaluronic acid will show decrease pain and
quicker rehabilitation and return to normal activity in patients with grade 2 and higher
cartilage damage that had gone through knee arthroscopy.