Vanguard TKA With KneeAlign 2 and Without KneeAlign 2

Randomized Controlled Study Comparing Vanguard With KneeAlign2 Navigational System Versus Vanguard Conventional

Purpose of this study is to determine the effectiveness of the KneeAlign 2 system in terms of precise implant alignment by demonstrating that KneeAlign 2 provides better tibial alignment compared to conventional instruments

Purpose of this study is to determine the effectiveness of the KneeAlign 2 system in terms of precise implant alignment by demonstrating that KneeAlign 2 provides better tibial alignment compared to conventional instruments.

Inclusion Criteria:

• Knee (either unilateral or bilateral) Osteoarthritis (varus deformity only)
• Subjects willing to return for follow-up evaluations

Exclusion Criteria:

• Knee degenerative diseases other than Knee Osteoarthritis (such as necrosis / Rheumatoid Arthritis)
• Severe OA deformation (FTA: >185 degrees or <175 degrees)
• Active Infection (or within 6 weeks after infection)
• Sepsis
• Osteomyelitis
• Any type of implant is inserted in the affected side of lower extremity
• Hip disease on the affected side
• Uncooperative patient or patient with neurologic disorders who are incapable of following directions
• diagnosed Osteoporosis or Osteomalacia
• Metabolic disorders which may impair bone formation
• Distant foci of infections which may spread to the implant site
• Rapid joint destruction, marked bone loss or bone resorption apparent on roentgenogram
• Vascular insufficiency, muscular atrophy or neuromuscular disease.