The rooster comb injections as you referred to them are hyaluranidase injections. There are several different brands on the market. I did a 5 week series of injections with Supartz which lasted about three months, and then a second with Synvisc(spelled that wrong) which is 3 week series of injections which lasted about two minutes (slight exaggeration)..very short lived. For me the steroid injections were more helpful. Everyone responds so differently.