Overview Comparison Between Four Types of Single Dose Hyaluronic Acid Injection in Patients With Knee Osteoarthritis Status: Unknown status Trial end date: 2019-12-01 Target enrollment: Participant gender: Summary Study design: Allocation: Randomized. Endpoint Classification: Comparative Study. Intervention model: Parallel Assignment. Masking: Double Blind (Subject, Assessed) Primary purpose: Comparison. Official Title: Intra-articular hyaluronic acid knee injection: randomized control trail. Primary outcome measures: - Lower extremity functional scale - Visual analogue scale - Range of motion - Kellgren and Lawrence class grade Estimated enrollment: 100 Study start date: December 2012 Estimated study completion date: June 2013 Estimated primary completion date: December 2013 Details Lead Sponsor: October 6 UniversityTreatments: Hyaluronic Acid