Randomized clinical trial comparing minimal invasive operating technique to conventional operating technique for placement of total knee prosthesis.

Clinical evaluations, patient questionnaires, X-rays and CT scans were done to compare these two techniques.

Study executed with 3 centers and 69 patients.

Inclusion Criteria:

• patient requiring Total Knee Arthroplasty (TKA)
• patients with Osteo arthritis
• intact collateral ligaments and patella tendon
• patients willing and able to comply with the post-operative schedule

Exclusion Criteria:

• patients who require a revision TKA
• patients with TKA contralateral knee within 6 months with bad outcomes
• patients who need a TKA on contralateral side within 2 years
• intraoperative resurfacing of patella
• intraoperative eversion of patella
• patients who had prior procedure of involved knee such as high tibial osteotomy, cruciate ligament recontruction, knee fusion or patellectomy
• BMI > 30
• patients with fixed flexion contracture> 15 degrees
• patients with deformity greater than 20 degrees of varus or 15 degrees of valgus
• Patient with Mediolateral stability > 10 degrees patient with active or suspected malignancy
• patient with Rheumatoid arthritis
• patient with systemic disease that would effect subject's wellfare or overall outcome of the study
• patient with other severe concurrent joint involvement which can effect their outcome
• patients with an immobile hip
• patient with a history of Pulmonary embolism or Deep venous thrombosis