new to site, have been having pain in my hip for the past year, originally diagnosed with bursitis of the hip, received three injections in the hip area s with no relief, then saw a different doctor, had a mri and was diagnosed with facet arthritis of L5-S1 joint last month, have had 1 injection and no pain for about 1 month, however it is starting to return. The doctor said something about inserting an aspen spacer. Has anyone ever heard of this? I'm not able to find any information on this. Thanks for any information.