Overview Study of TG-C in Patients With Grade 3 Degenerative Joint Disease of the Knee Status: Completed Trial end date: 2014-10-01 Target enrollment: Participant gender: Summary The purpose of this study is to see if we can safely regenerate cartilage without invasive surgery using a biologic product called TissueGene-C. Phase: Phase 2 Details Lead Sponsor: Kolon TissueGene, Inc.TissueGene, Inc.